DS26334G+

DEMO KIT AVAILABLE 19-5753; Rev 3/11 DS26334 3.3V, 16-Channel, E1/T1/J1 Short- and Long-Haul Line Interface Unit GENERAL DESCRIPTION FEATURES The DS26334 is a 16-channel short/long-haul line interface unit (LIU) that supports E1/T1/J1 from a single 3.3V power supply. A single bill of material can support E1/T1/J1 that requires no external termination. Redundancy is supported through nonintrusive monitoring, optimal high-impedance modes and configurable 1:1 or 1+1 backup enhancements. An on-chip synthesizer generates the E1/T1/J1 clock rates by a single master clock input of various frequencies. Two clock output references are also offered. The device is offered in a 256-pin TE-CSBGA, the smallest package available for a 16-channel LIU. APPLICATIONS T1 Digital Cross-Connects ATM and Frame Relay Equipment Wireless Base Stations ISDN Primary Rate Interface E1/T1/J1 Multiplexer and Channel Banks E1/T1/J1 LAN/WAN Routers           FUNCTIONAL DIAGRAM JTAG MODE SOFTWARE CONTROL AND JTAG LOSS RTIP RECEIVER RPOS RNEG RCLK TRANSMITTER TPOS TNEG TCLK RRING TTIP TRING 1         16 16 E1, T1, or J1 Short/Long-Haul Line Interface Units Independent E1, T1 or J1 Selections Fully Internal Impedance Match Requires No External Resistors Software-Selectable Transmit and ReceiveSide Impedance Match Crystal-Less Jitter Attenuator Selectable Single-Rail and Dual-Rail Mode and AMI or HDB3/B8ZS Line Encoding and Decoding Detection and Generation of AIS Digital/Analog Loss of Signal Detection as per T1.231, G.775 and ETS 300 233 External Master Clock Can Be Multiple of 2.048MHz or 1.544MHz for T1/J1 or E1 Operation; This Clock Will Be Internally Adapted for T1 or E1 Usage Receiver Signal Level Indicator from -2.5dB to -38dB in T1 Mode and -3dB to -43dB in E1 Mode in 2.5dB Increments Two Built-In BERT Testers for Diagnostics 8-Bit Parallel Interface Support for Intel or Motorola Mode or a 4-Wire Serial Interface Transmit Short-Circuit Protection G.772 Nonintrusive Monitoring Receive Monitor Mode Handles Combinations of 14dB to 30dB of Resistive Attenuation Along with 12dB to 30dB of Cable Attenuation Specification Compliance to the Latest T1 and E1 Standards Single 3.3V Supply with 5V Tolerant I/O JTAG Boundary Scan as Per IEEE 1149.1 ORDERING INFORMATION PART DS26334G DS26334G+ DS26334GN DS26334GN+ TEMP RANGE PIN-PACKAGE 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C 256 TE-CSBGA 256 TE-CSBGA 256 TE-CSBGA 256 TE-CSBGA +Denotes a lead(Pb)-free/RoHS compliant package. Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. 1 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit TABLE OF CONTENTS 1 STANDARDS COMPLIANCE ........................................................................................................ 6 1.1 TELECOM SPECIFICATIONS COMPLIANCE ....................................................................................... 6 2 DETAILED DESCRIPTION ............................................................................................................ 7 3 BLOCK DIAGRAMS ...................................................................................................................... 8 4 5 PIN DESCRIPTION ...................................................................................................................... 10 FUNCTIONAL DESCRIPTION ..................................................................................................... 17 5.1 PORT OPERATION ...................................................................................................................... 17 5.1.1 5.1.2 5.1.3 5.2 5.3 5.4 POWER-UP AND RESET .............................................................................................................. 19 MASTER CLOCK ......................................................................................................................... 19 TRANSMITTER ............................................................................................................................ 20 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 5.4.7 5.4.8 5.5 General Description ....................................................................................................................... 34 Configuration and Monitoring ......................................................................................................... 35 Receive Pattern Detection.............................................................................................................. 36 Transmit Pattern Generation .......................................................................................................... 38 REGISTER MAPS AND DEFINITION .......................................................................................... 39 6.1 REGISTER DESCRIPTION ............................................................................................................. 48 6.1.1 6.1.2 6.1.3 6.1.4 7 Analog Loopback ........................................................................................................................... 32 Digital Loopback ............................................................................................................................ 33 Remote Loopback .......................................................................................................................... 33 BERT........................................................................................................................................ 34 5.9.1 5.9.2 5.9.3 5.9.4 6 Receiver Impedance Matching Calibration ..................................................................................... 27 Receiver Monitor Mode .................................................................................................................. 27 Peak Detector and Slicer ............................................................................................................... 28 Receive Level Indicator .................................................................................................................. 28 Clock and Data Recovery............................................................................................................... 28 Loss of Signal ................................................................................................................................ 28 AIS ................................................................................................................................................ 29 Receive Dual-Rail Mode ................................................................................................................ 30 Receive Single-Rail Mode .............................................................................................................. 30 Bipolar Violation and Excessive Zero Detector ............................................................................... 30 JITTER ATTENUATOR .................................................................................................................. 31 G.772 MONITOR ........................................................................................................................ 32 LOOPBACKS ............................................................................................................................... 32 5.8.1 5.8.2 5.8.3 5.9 Transmit Line Templates................................................................................................................ 22 LIU Transmit Front-End.................................................................................................................. 25 Transmit Dual-Rail Mode ............................................................................................................... 26 Transmit Single-Rail Mode ............................................................................................................. 26 Zero Suppression—B8ZS or HDB3 ................................................................................................ 26 Transmit Power-Down.................................................................................................................... 26 Transmit All Ones .......................................................................................................................... 27 Driver Fail Monitor.......................................................................................................................... 27 RECEIVER .................................................................................................................................. 27 5.5.1 5.5.2 5.5.3 5.5.4 5.5.5 5.5.6 5.5.7 5.5.8 5.5.9 5.5.10 5.6 5.7 5.8 Serial Port Operation ..................................................................................................................... 17 Parallel Port Operation ................................................................................................................... 18 Interrupt Handling .......................................................................................................................... 18 Primary Register Bank ................................................................................................................... 48 Secondary Register Bank............................................................................................................... 63 Individual LIU Register Bank .......................................................................................................... 66 BERT Registers ............................................................................................................................. 85 JTAG BOUNDARY SCAN ARCHITECTURE AND TEST ACCESS PORT.................................. 92 7.1 TAP CONTROLLER STATE MACHINE ............................................................................................ 93 7.1.1 7.1.2 Test-Logic-Reset ........................................................................................................................... 93 Run-Test-Idle ................................................................................................................................. 93 2 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 7.1.3 7.1.4 7.1.5 7.1.6 7.1.7 7.1.8 7.1.9 7.1.10 7.1.11 7.1.12 7.1.13 7.1.14 7.1.15 7.1.16 7.2 INSTRUCTION REGISTER ............................................................................................................. 96 7.2.1 7.2.2 7.2.3 7.2.4 7.2.5 7.2.6 7.3 Select-DR-Scan ............................................................................................................................. 93 Capture-DR ................................................................................................................................... 93 Shift-DR ......................................................................................................................................... 93 Exit1-DR ........................................................................................................................................ 93 Pause-DR ...................................................................................................................................... 93 Exit2-DR ........................................................................................................................................ 93 Update-DR..................................................................................................................................... 93 Select-IR-Scan............................................................................................................................... 94 Capture-IR ..................................................................................................................................... 94 Shift-IR .......................................................................................................................................... 94 Exit1-IR.......................................................................................................................................... 94 Pause-IR ....................................................................................................................................... 94 Exit2-IR.......................................................................................................................................... 94 Update-IR ...................................................................................................................................... 94 EXTEST ........................................................................................................................................ 96 HIGHZ ........................................................................................................................................... 96 CLAMP .......................................................................................................................................... 96 SAMPLE/PRELOAD ...................................................................................................................... 96 IDCODE ........................................................................................................................................ 96 BYPASS ........................................................................................................................................ 96 TEST REGISTERS ....................................................................................................................... 97 7.3.1 7.3.2 7.3.3 Boundary Scan Register ................................................................................................................ 97 Bypass Register............................................................................................................................. 97 Identification Register .................................................................................................................... 97 8 DC ELECTRICAL CHARACTERIZATION ................................................................................... 98 8.1 DC PIN LOGIC LEVELS................................................................................................................ 98 8.2 SUPPLY CURRENT AND OUTPUT VOLTAGE ................................................................................... 98 9 AC TIMING CHARACTERISTICS ................................................................................................ 99 9.1 LINE INTERFACE CHARACTERISTICS ............................................................................................ 99 9.2 PARALLEL HOST INTERFACE TIMING CHARACTERISTICS...............................................................100 9.3 SERIAL PORT ............................................................................................................................112 9.4 SYSTEM TIMING ........................................................................................................................113 9.5 JTAG TIMING............................................................................................................................115 10 PIN CONFIGURATION................................................................................................................116 11 12 PACKAGE INFORMATION .........................................................................................................117 THERMAL INFORMATION .........................................................................................................118 13 DATA SHEET REVISION HISTORY ...........................................................................................120 3 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit LIST OF FIGURES Figure 3-1. Block Diagram ..................................................................................................................................... 8 Figure 3-2. Receive Logic Detail ............................................................................................................................ 9 Figure 3-3. Transmit Logic Detail ........................................................................................................................... 9 Figure 5-1. Serial Port Operation for Write Access ............................................................................................... 17 Figure 5-2. Serial Port Operation for Read Access with CLKE = 0 ........................................................................ 17 Figure 5-3. Serial Port Operation for Read Access with CLKE = 1 ........................................................................ 18 Figure 5-4. Interrupt Handling Flow Diagram ........................................................................................................ 19 Figure 5-5. Prescaler PLL and Clock Generator ................................................................................................... 20 Figure 5-6. T1 Transmit Pulse Templates............................................................................................................. 23 Figure 5-7. E1 Transmit Pulse Templates............................................................................................................. 24 Figure 5-8. LIU Front-End .................................................................................................................................... 25 Figure 5-9. Jitter Attenuation ................................................................................................................................ 31 Figure 5-10. Analog Loopback ............................................................................................................................. 32 Figure 5-11. Digital Loopback .............................................................................................................................. 33 Figure 5-12. Remote Loopback ............................................................................................................................ 33 Figure 5-13. PRBS Synchronization State Diagram .............................................................................................. 36 Figure 5-14. Repetitive Pattern Synchronization State Diagram ............................................................................ 37 Figure 7-1. JTAG Functional Block Diagram......................................................................................................... 92 Figure 7-2. TAP Controller State Diagram ............................................................................................................ 95 Figure 9-1. Intel Nonmuxed Read Cycle ............................................................................................................. 101 Figure 9-2. Intel Mux Read Cycle ....................................................................................................................... 102 Figure 9-3. Intel Nonmux Write Cycle ................................................................................................................. 104 Figure 9-4. Intel Mux Write Cycle ....................................................................................................................... 105 Figure 9-5. Motorola Nonmux Read Cycle.......................................................................................................... 107 Figure 9-6. Motorola Mux Read Cycle ................................................................................................................ 108 Figure 9-7. Motorola Nonmux Write Cycle .......................................................................................................... 110 Figure 9-8. Motorola Mux Write Cycle ................................................................................................................ 111 Figure 9-9. Serial Bus Timing Write Operation.................................................................................................... 112 Figure 9-10. Serial Bus Timing Read Operation with CLKE = 0 .......................................................................... 112 Figure 9-11. Serial Bus Timing Read Operation with CLKE = 1 .......................................................................... 112 Figure 9-12. Transmitter Systems Timing ........................................................................................................... 113 Figure 9-13. Receiver Systems Timing ............................................................................................................... 114 Figure 9-14. JTAG Timing .................................................................................................................................. 115 Figure 10-1. 256-Ball TE-CSBGA....................................................................................................................... 116 4 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit LIST OF TABLES Table 4-1. Pin Descriptions .................................................................................................................................. 10 Table 5-1. Parallel Port Mode Selection and Pin Functions................................................................................... 18 Table 5-2. Telecommunications Specification Compliance for DS26334 Transmitters........................................... 21 Table 5-3. Registers Related to Control of DS26334 Transmitters ........................................................................ 21 Table 5-4. Template Selections for Short-Haul Mode............................................................................................ 22 Table 5-5. Template Selections for Long-Haul Mode ............................................................................................ 22 Table 5-6. LIU Front-End Values .......................................................................................................................... 26 Table 5-7. Loss Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications .......................................... 28 Table 5-8. AIS Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications ............................................ 29 Table 5-9. AIS Detection and Reset Criteria for DS26334..................................................................................... 29 Table 5-10. Registers Related to AIS Detection.................................................................................................... 30 Table 5-11. BPV, Code Violation, and Excessive Zero Error Reporting................................................................. 30 Table 5-12. Pseudorandom Pattern Generation ................................................................................................... 35 Table 5-13. Repetitive Pattern Generation............................................................................................................ 35 Table 6-1. Primary Register Set ........................................................................................................................... 40 Table 6-2. Secondary Register Set....................................................................................................................... 41 Table 6-3. Individual LIU Register Set .................................................................................................................. 42 Table 6-4. BERT Register Set .............................................................................................................................. 43 Table 6-5. Primary Register Set Bit Map .............................................................................................................. 44 Table 6-6. Secondary Register Set Bit Map .......................................................................................................... 45 Table 6-7. Individual LIU Register Set Bit Map ..................................................................................................... 46 Table 6-8. BERT Register Bit Map ....................................................................................................................... 47 Table 6-9. G.772 Monitoring Control (LIU 1) ......................................................................................................... 54 Table 6-10. G.772 Monitoring Control (LIU 9) ....................................................................................................... 54 Table 6-11. TST Template Select Transmitter Register (LIUs 1–8) ....................................................................... 59 Table 6-12. TST Template Select Transmitter Register (LIUs 9–16) ..................................................................... 59 Table 6-13. Template Selection............................................................................................................................ 60 Table 6-14. Address Pointer Bank Selection ........................................................................................................ 63 Table 6-15. DS26334 MCLK Selections ............................................................................................................... 69 Table 6-16. Receiver Sensitivity/Monitor Mode Gain Selection ............................................................................. 75 Table 6-17. Receiver Signal Level ........................................................................................................................ 76 Table 6-18. Bit Error Rate Transceiver Select for Channels 1–8 ........................................................................... 80 Table 6-19. Bit Error Rate Transceiver Select for Channels 9–16 ......................................................................... 80 Table 6-20. PLL Clock Select ............................................................................................................................... 83 Table 6-21. Clock A Select................................................................................................................................... 83 Table 7-1. Instruction Codes for IEEE 1149.1 Architecture ................................................................................... 96 Table 7-2. ID Code Structure ............................................................................................................................... 97 Table 7-3. Device ID Codes ................................................................................................................................. 97 Table 8-1. Recommended DC Operating Conditions ............................................................................................ 98 Table 8-2. Pin Capacitance .................................................................................................................................. 98 Table 8-3. DC Characteristics .............................................................................................................................. 98 Table 9-1. Transmitter Characteristics.................................................................................................................. 99 Table 9-2. Receiver Characteristics...................................................................................................................... 99 Table 9-3. Intel Read Mode Characteristics ........................................................................................................ 100 Table 9-4. Intel Write Cycle Characteristics ........................................................................................................ 103 Table 9-5. Motorola Read Cycle Characteristics ................................................................................................. 106 Table 9-6. Motorola Write Cycle Characteristics ................................................................................................. 109 Table 9-7. Serial Port Timing Characteristics...................................................................................................... 112 Table 9-8. Transmitter System Timing................................................................................................................ 113 Table 9-9. Receiver System Timing.................................................................................................................... 114 Table 9-10. JTAG Timing Characteristics ........................................................................................................... 115 Table 12-1. Thermal Characteristics................................................................................................................... 118 Table 12-2. Package Power Dissipation (for Thermal Considerations) ................................................................ 118 Table 12-3. Per-Channel Power-Down Savings (for Thermal Considerations)..................................................... 119 5 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 1 STANDARDS COMPLIANCE 1.1 Telecom Specifications Compliance The DS26334 LIU meets all the relevant latest Telecommunications Specifications. The following provides the T1 and E1 Specifications and relevant sections that are applicable to the DS26334. • T1-Related Telecommunications Specifications • ANSI T1.102: Digital Hierarchy Electrical Interface • ANSI T1.231: Digital Hierarchy- Layer 1 in Service Performance Monitoring • ANSI T1.403: Network and Customer Installation Interface- DS1 Electrical Interface • G.736: Characteristics of a synchronous digital multiplex equipment operating at 2048kbps • G.823: The control of jitter and wander within digital networks which are based on the 2048kbps hierarchy • Pub 62411: High Capacity Terrestrial Digital Service • ITU-T G.772: Protected monitoring points provided on digital transmission systems • E1-Related Telecommunications Specifications • ITU-T G.703: Physical/Electrical Characteristics of G.703 Hierarchical Digital Interfaces • ITU-T G.736: Characteristics of Synchronous Digital Multiplex Equipment operating at 2048kbps • ITU-T G.742: Second Order Digital Multiplex Equipment Operating at 8448kbps • ITU-T G.772: Protected monitoring points provided on digital transmission systems • ITU-T G.775: Loss of signal (LOS) and alarm indication signal (AIS) defect detection and clearance criteria • ETS 300 166: Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2048kbps-based plesiosynchronous or synchronous digital hierarchies • ETS 300 233: Integrated Services Digital Network (ISDN) • G.736: Characteristics of a synchronous digital multiplex equipment operating at 2048kbps • G.823: The control of jitter and wander within digital networks which are based on the 2048kbps hierarchy • Pub 62411: High Capacity Terrestrial Digital Service 6 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 2 DETAILED DESCRIPTION The DS26334 is a single-chip, 16-channel, long-haul and short-haul line interface unit for T1 (1.544Mbps) and E1 (2.048Mbps) applications. Sixteen independent receivers and transmitters are provided in a single TE-CSBGA package. The LIUs can be individually selected for T1, J1, or E1 operation. The LIU requires a single master reference clock. This clock can be either 1.544MHz or 2.048MHz or multiples thereof, and either frequency can be internally adapted for T1, J1, or E1 mode. Internal impedance matching provided for both transmit and receive paths reduces external component count. The transmit waveforms are compliant to G.703 and T1.102 specification. The DS26324 provides software-selectable internal transmit termination for 100Ω T1 twisted pair, 110Ω J1 twisted pair, 120Ω E1 twisted pair, and 75Ω E1 coaxial applications. The transmitters have fast highimpedance capability and can be individually powered down. The receivers can function with up to a receive signal attenuation of 36dB for T1 mode, or 43dB for E1 mode. A monitor gain setting also can be enabled to provide 14dB, 20dB, 26dB, and 32dB of resistive gain. The DS26334 can be configured as a 14-channel LIU with Channel 1 and 9 used for nonintrusive monitoring in accordance with G.772. The receivers and transmitters can be programmed into single or dual-rail mode. AMI or HDB3/B8ZS encoding and decoding is selectable in single-rail mode. A 128-bit crystal-less on-board jitter attenuator for each LIU can be placed in receive or transmit directions. The jitter attenuator meets the ETS CTR12/13 ITU-T G.736, G.742, G.823, and AT&T Pub 62411 specifications. The DS26334 detects and generates AIS in accordance with T1.231, G.775, and ETS 300 233. Loss of signal is detected in accordance with T1.231, G.775, and ETS 300 233. The DS26334 can perform digital, analog, remote, and dual loopbacks on individual LIUs. JTAG boundary scan is provided for the digital pins. The DS26334 can be configured using 8-bit multiplexed or nonmultiplexed Intel or Motorola ports. A 4-pin serial port selection is also available for configuration and monitoring of the device. The analog AMI/HDB3 waveform of the E1 line or the AMI/B8ZS waveform of the T1 line is transformer coupled into the RTIP and RRING pins of the DS26334. The user can terminate the receive line using only internal termination that requires no external resistors. Or, the user has the option to use partially internal impedance matching using a common 120Ω external resistor for E1, T1, and J1, and matching the line impedance internally to obtain 75Ω, 100Ω, 110Ω, or 120Ω termination values. Note that fully internal impedance match requires a 1:1 transformer on the receive line. Partially internal impedance matching supports either a 1:1 or a 1:2 transformer on the receive line. If a 1:2 transformer is used, the external termination resistor should be 30Ω. For long-haul applications, a 1:1 transformer on the receive line is preferred. The DS26334 drives the E1 or T1 line from the TTIP and TRING pins by a 1:2 coupling transformer. The device recovers clock and data from the analog signal and passes it through a selectable jitter attenuator outputting the received line clock at RCLK and data at RPOS and RNEG. The DS26334 receivers can recover data and clock for up to 36dB of attenuation of the transmitted signals in T1 mode and 43dB for E1 mode. Receiver 1 can monitor the performance of receivers 2 to 8 or transmitters 2 to 8. Receiver 9 can monitor the performance of receivers 10 to 16 or transmitters 10 to 16. The DS26334 contains 16 identical transmitters. Digital transmit data is input at TPOS/TNEG with reference to TCLK. The data at these pins can be single-rail or dual-rail. This data is processed by waveshaping circuitry and the line driver to output at TTIP and TRING in accordance with ANSI T1.102 for T1/J1 or G.703 for E1 mask. 7 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 3 BLOCK DIAGRAMS Figure 3-1. Block Diagram TYPICAL OF ALL 16 CHANNELS T1CLK E1CLK DS26334 MUX VCO/PLL LOS RPOS/RDAT TTIP Remote Loopback RNEG/CV TPOS/TDAT Wave Shaping CSU Filters Line Drivers TRING Jitter Attenuator Unframed All Ones Insertion RCLK Receive Logic Local Loopback Remote Loopback (Dual Mode) Clock/Data Recovery Peak Detector Analog Loopback RTIP Filter Optional Termination RRING TCLK Transmit Logic TNEG OE Reset T1CLK E1CLK 16 Control and Interrupt Port Interface Master Clock Adapter JTAG PORT 8 of 121 MCLK TDI TDO TCLK TMS TRSTB INTB CSB 8 D0 to D7/ AD0 to AD7 A0 to A4 A5/BSWB ASB/ALE/SCLK MOTEL RDY/ACKB/SDO RDB/RWB CLKE WRB/DSB/SDI RSTB 5 MODESEL Reset 16 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit LOS EZDE Figure 3-2. Receive Logic Detail RCLK RCLK Excessive Zero Detect T1.231 IAISEL POS AISEL NEG EN RPOS NRZ Data All Ones Insert (AIS) RNEG/CV ENCV BPV/CV/EXZ MCLK LASCS SRMS AIS Detector G.775, ETSI 300233, T1.231 ENCODE CVDEB CODE LCS ENCODE B8ZS/HDB3/AMI Decoder (G.703, T1.102) BPVs, Code Violatiions (T1.231, O.161) MUX BEIR ENCODE SRMS LCS CODE Figure 3-3. Transmit Logic Detail B8ZS/HDB3/AMI Coder (G.703, T1.102) To Remote Loopback BPV Insert MUX TPOS/ TDATA TNEG/ BPV TCLK 9 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 4 PIN DESCRIPTION Table 4-1. Pin Descriptions NAME PIN TYPE FUNCTION ANALOG TRANSMIT AND RECEIVE TTIP1 TTIP2 TTIP3 TTIP4 TTIP5 TTIP6 TTIP7 TTIP8 TTIP9 TTIP10 TTIP11 TTIP12 TTIP13 TTIP14 TTIP15 TTIP16 TRING1 TRING2 TRING3 TRING4 TRING5 TRING6 TRING7 TRING8 TRING9 TRING10 TRING11 TRING12 TRING13 TRING14 TRING15 TRING16 RTIP1 RTIP2 RTIP3 RTIP4 RTIP5 RTIP6 RTIP7 RTIP8 RTIP9 RTIP10 RTIP11 RTIP12 RTIP13 RTIP14 RTIP15 RTIP16 E1 F1 K1 L1 T5 T6 T10 T11 M16 L16 G16 F16 A12 A11 A7 A6 E2 F2 K2 L2 R5 R6 R10 R11 M15 L15 G15 F15 B12 B11 B7 B6 A1 C1 H1 N1 T1 T3 T8 T13 T16 P16 J16 D16 A16 A14 A9 A4 Analog output Transmit Bipolar Tip for Channels 1–16. These pins are differential line driver tip outputs. These pins can be high impedance if pin OE is low. When “1” is set in the Output Enable Register OE bit, the associated TTIPn pin will be enabled when the OE pin is high. The differential outputs of TTIPn and TRINGn can provide internal matched impedance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω. If the TCLK input for a given LIU is held low for 64 MCLKs, that LIU’s transmitter is powered down and the TTIP/TRING outputs are high impedance. Analog output Transmit Bipolar Ring for Channels 1–16. These pins are differential line driver ring outputs. These pins can be high impedance if pin OE is low. When “1” is set in the Output Enable Register OE bit, the associated TRINGn pin will be enabled when the OE pin is high. The differential outputs of TTIPn and TRINGn can provide internal matched impedance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω. If the TCLK input for a given LIU is held low for 64 MCLKs, that LIU’s transmitter is powered down and the TTIP/TRING outputs are high impedance. Analog input Receive Bipolar Tip for Channels 1–16. Receive analog input for differential receiver. Data and clock are recovered and output at RPOS/RNEG and RCLK pins, respectively. The differential inputs of RTIPn and RRINGn can provide internal impedance matching with external resistance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω. 10 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit NAME PIN TYPE FUNCTION RESREF R9 Analog input Resistor Reference. If fully internal receive impedance match is selected, a 16kΩ ±1% resistor to GND is needed. If not used, tie pin low. RRING1 RRING2 RRING3 RRING4 RRING5 RRING6 RRING7 RRING8 RRING9 RRING10 RRING11 RRING12 RRING13 RRING14 RRING15 RRING16 A2 C2 H2 N2 R1 R3 R8 R13 T15 P15 J15 D15 B16 B14 B9 B4 Analog input Receive Bipolar Ring for Channels 1–16. Receive analog input for differential receiver. Data and clock are recovered and output at RPOS/RNEG and RCLK pins, respectively. The differential inputs of RTIPn and RRINGn can provide internal impedance matching with external resistance for E1 75Ω, E1 120Ω, T1 100Ω, or J1 110Ω. DIGITAL Tx/Rx TPOS1/TDATA1 TPOS2/TDATA2 TPOS3/TDATA3 TPOS4/TDATA4 TPOS5/TDATA5 TPOS6/TDATA6 TPOS7/TDATA7 TPOS8/TDATA8 TPOS9/TDATA9 TPOS10/TDATA10 TPOS11/TDATA11 TPOS12/TDATA12 TPOS13/TDATA13 TPOS14/TDATA14 TPOS15/TDATA15 TPOS16/TDATA16 TNEG1 TNEG2 TNEG3 TNEG4 TNEG5 TNEG6 TNEG7 TNEG8 TNEG9 TNEG10 TNEG11 TNEG12 TNEG13 TNEG14 TNEG15 TNEG16 F6 G7 J6 K6 L9 N5 P12 M11 L11 J11 G11 C14 F9 E7 N12 D5 C3 J14 J5 G10 M6 P6 P7 K9 L12 J12 H11 E13 G8 F7 C6 C5 Transmit Positive Data Input for Channels 1–6. When DS26334 is configured in dual-rail mode, the data input to TPOSn is output as a positive pulse on the line (tip and ring). I Transmit Data Input for Channels 1–16. When the device is configured in single-rail mode NRZ data is input to TDATAn. The data is sampled on the falling edge of TCLKn and encoded HDB3/B8ZS or AMI before being output to the line. Transmit Negative Data for Channels 1–16. When DS26334 is configured in dual-rail mode. The data input to TNEGn is output as a negative mark on the line. TPOS and TNEG in dual-rail mode result in positive and negative pulses sent on the line: I TPOSn 0 0 1 1 11 of 121 TNEGn 0 1 0 1 OUTPUT PULSE Space Negative mark Positive mark Space DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit NAME PIN TCLK1 TCLK2 TCLK3 TCLK4 TCLK5 TCLK6 TCLK7 TCLK8 TCLK9 TCLK10 TCLK11 TCLK12 TCLK13 TCLK14 TCLK15 TCLK16 RPOS1/RDATA1 RPOS2/RDATA2 RPOS3/RDATA3 RPOS4/RDATA4 RPOS5/RDATA5 RPOS6/RDATA6 RPOS7/RDATA7 RPOS8/RDATA8 RPOS9/RDATA9 RPOS10/RDATA10 RPOS11/RDATA11 RPOS12/RDATA12 RPOS13/RDATA13 RPOS14/RDATA14 RPOS15/RDATA15 RPOS16/RDATA16 RNEG1/CV1 RNEG2/CV2 RNEG3/CV3 RNEG4/CV4 RNEG5/CV5 RNEG6/CV6 RNEG7/CV7 RNEG8/CV8 RNEG9/CV9 RNEG10/CV10 RNEG11/CV11 RNEG12/CV12 RNEG13/CV13 RNEG14/CV14 RNEG15/CV15 RNEG16/CV16 F5 G4 G9 H6 M7 L8 L10 P9 K11 K12 F14 E12 C11 D12 N7 D11 F4 F3 L3 L4 K8 M9 P8 M12 M14 K13 G12 E14 C12 C10 C8 E5 E3 G5 K4 M3 L7 M10 P11 K10 M13 L14 F13 F11 E10 C9 C7 J3 TYPE FUNCTION Transmit Clock for Channels 1–16. The transmit clock has to be 1.544MHz for T1 or 2.048MHz for E1 mode. TCLKn is the clock used to sample the data TPOS/TNEG or TDAT on the falling edge. The expected TCLK can be inverted. I If TCLKn is ‘high’ for 16 or more MCLKs, then transmit all ones (TAOs) is sent to the line side of the corresponding transmit channel. When TCLKn starts clocking again, normal operation will begin again for the corresponding transmit channel. If TCLKn is ‘low’ for 64 or more MCLKs, then the corresponding transmit channel on the line side will power-down and be put into high impedance. When TCLKn starts clocking again the corresponding transmit channel will power-up and come out of high impedance. O, tri-state Receive Positive Data Output for Channels 1–16. In dual-rail mode the NRZ data output indicates a positive pulse on RTIP/RRING. Upon detecting an LOS, AIS can be inserted if the AISEL bit in the GC (0Fh) register is set; otherwise, the pins will be active. AIS insertion can also be controlled on an individual LIU basis by the IAISEL (05h) register. If a given receiver is in power-down mode, the associated RPOS pin is high impedance. Receive Data Output for Channels 1–16. In single-rail mode, NRZ data is sent out on this pin. If a given receiver is in power-down mode, the associated RPOS pin is high impedance. Note: During an LOS condition, the RPOS/RDATA outputs remain active. O, tri-state Receive Negative Data Output for Channels 1–16. In dual-rail mode the NRZ data output indicates a negative pulse on RTIP/RRING. Upon detecting a LOS, AIS can be inserted if AISEL bit in the GC register is set; otherwise, the pins will be active. AIS insertion can also be controlled on an individual LIU basis by IAISEL register. If a given receiver is in power-down mode, the associated RNEG pin is high impedance. Code Violation for Channels 1–16. In single-rail mode, bipolar violation, code violation, and excessive zeros are reported on CVn. If HDB3 or B8ZS is not selected, this pin indicates only BPVs. If a given receiver is in power-down mode, the associated CV pin is high impedance. 12 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit NAME PIN RCLK1 RCLK2 RCLK3 RCLK4 RCLK5 RCLK6 RCLK7 RCLK8 RCLK9 RCLK10 RCLK11 RCLK12 RCLK13 RCLK14 RCLK15 RCLK16 D3 G6 K3 K5 P5 M8 P10 P13 L13 K14 G13 F12 E8 E9 F8 E6 MCLK H12 LOS1 LOS2 LOS3 LOS4 LOS5 LOS6 LOS7 LOS8 LOS9 LOS10 LOS11 LOS12 LOS13 LOS14 LOS15/TECLK LOS16/CLKA D2 G2 J2 M2 R2 T2 R4 R7 R14 N15 K15 H15 B10 B8 E11 F10 TYPE FUNCTION O, tri-state Receive Clock for Channels 1–16. The receive data (RPOS/RNEG) is clocked out on the rising edge of RCLK. If a given receiver is in power-down mode the RCLK is high impedance. Upon an LOS being detected, the RCLK is switched from the recovered clock to MCLK. RCLK can be inverted by the RCLKI register. I Master Clock. This is an independent free-running clock that can be a multiple of 2.048MHz ±50ppm for E1 mode or 1.544MHz ±50ppm for T1 mode. The clock selection is available by MC bits MPS0, MPS1, FREQS, and PLLE. A multiple of 2.048MHz can be internal adapted to 1.544MHz and a multiple of 1.544MHz can be internal adapted to 2.048MHz. Loss-of-Signal Output. This output goes high when there is no transition on the received signal over a specified interval. The output will go low when there is sufficient ones density in the received signal. The LOS criteria for assertion and desertion criteria are described in Section 5.5.6. The LOS outputs can be configured to comply with T1.231, ITU-T G.775, or ETS 300 233. O T1/E1 Clock (TECLK) (Ball E11 only). This output becomes a T1 or E1 programmable clock output when enabled by register MC. For T1 or E1 frequency selection, see the CCR register. Clock A (CLKA) (Ball F10 only). This output becomes a programmable clock output when enabled by register MC. For frequency options, see the CCR register. MODESEL A3 I MOTEL B3 I CSB P14 I HOST SELECTION Mode Selection. This pin is used to select the control mode of the DS26334: Low → Serial Host Mode High → Parallel Host Mode Motorola Intel Select. When this pin is low, Motorola mode is selected. When this pin is high Intel mode is selected. Chip Select Bar. This signal must be low during all accesses to the registers. 13 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit NAME PIN TYPE FUNCTION Shift Clock. In the serial host mode, this pin is the serial clock. Data on SDI is clocked on the rising edge of SCLK. The data is clocked on SDO on the rising edge of SCLK if CLKE is high. If CLKE is low the data on SDO is clocked on the falling edge of SCLK. SCLK/ALE/ASB N14 I Address Latch Enable. In parallel Intel multiplexed mode, the address lines are latched on the falling edge of ALE. Address Strobe Bar. In parallel Motorola multiplexed mode, the address is sampled on the falling edge of ASB. Note: Tie ALE/ASB pin high if using nonmuxed mode. Read Bar. In Intel host mode, this pin must be low for read operation. RDB/RWB H14 I Read Write Bar. In Motorola mode, this pin is low for write operation and high for read operation. Serial Data Input. In the serial host mode, this pin is the serial input SDI; it is sampled on the rising edge of SCLK. SDI/WRB/DSB G14 I Write Bar. In Intel host mode, this pin is active low during write operation. The data or address (multiplexed mode) is sampled on the rising edge of WRB. Data Strobe Bar. In the parallel Motorola mode, this pin is active low. During a write operation the data or address is sampled on the rising edge of DSB. During a read operation the data or address is driven on the rising edge of DSB. In the nonmultiplexed Motorola mode the address bus (A[5:0]) is latched on the falling edge of DSB. Serial Data Out. In serial host mode, the SDO data is output on this pin. If a serial write is in progress this pin is high impedance. During a read SDO is high impedance when the SDI is in command/address mode. If CLKE is low SDO is output on the rising edge of SCLK, if CLKE is high on the falling edge. SD0/RDYB/ACKB C13 O Ready Bar Output. A high on this pin reports to the host that the cycle is not complete and wait states must be inserted. A low means the cycle is complete. Acknowledge Bar. In Motorola parallel mode, a low on this pin indicates that the read data is available for the Host or that the written data cycle is complete. INTB D7 O, open drain Interrupt Bar (Active Low). This signal is tri-state when RSTB pin is low. This interrupt signal is driven low when an event is detected on any of the enabled interrupt sources in any of the register banks. When there are no active and enabled interrupt sources, the pin can be programmed to either drive high or as open drain. The reset default is open drain when there are no active enabled interrupt sources. All interrupt sources are disabled when RSTB = 0 and they must be programmed to be enabled. 14 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit NAME PIN D7/AD7 D6/AD6 D5/AD5 D4/AD4 D3/AD3 D2/AD2 D1/AD1 D0/AD0 N3 P3 M4 L5 K7 P4 M5 L6 TYPE FUNCTION Data Bus 7–0. In nonmultiplexed host mode, these pins are the bidirectional data bus. I/O, tri-state Address/Data Bus 7–0. In multiplexed host mode, these pins are the bidirectional address/data bus. Note: AD7 and AD6 do not carry address information. In serial host mode, these pins should be grounded. Address 5. In the host nonmultiplexed mode, this is the most significant bit of the address bus. A5/BSWP E4 I Bit Swap. In serial host mode, this bit defines the serial data position to be MSB first when low and LSB first when high. In multiplexed host mode, this pin should be grounded. A4 A3 A2 A1 A0 OE C4 H5 G3 H3 N10 R12 Address Bus 4–0. These five pins are address pins in the parallel host mode. I In serial host mode and multiplexed host mode, these pins should be grounded. I Output Enable. If this pin is pulled low all the transmitters outputs (TTIP and TRING) are high impedance. If pulled high all the transmitters are enabled when the associated output enable OE bit is set. If TST.RHPMC is set, the OE pin is granted control of the receiver internal termination. When OE is low, receiver internal termination will be high impedance. When OE is high, receiver termination will be enabled. The receiver can still monitor incoming signals even when termination is in high impedance. Clock Edge. If CLKE is high, SDO is clocked out on falling edge of SCLK and if low SDO is on rising edge of SCLK. CLKE/MUX T14 I TRSTB E15 I, pullup TMS B13 I, pullup TCK D14 I TDO A15 O, high-Z TDI B15 I, pullup Multiplexed/Nonmultiplexed Select Pin. When in parallel port mode, this pin is used to select multiplexed address and data operation or separate address and data. When mux is a high multiplexed address and data is used and when mux is low nonmultiplexed is used. JTAG JTAG Test Port Reset. This pin if low will reset the JTAG port. If not used it can be left unconnected. JTAG Test Mode Select. This pin is clocked on the rising edge of TCK and is used to control the JTAG selection between scan and Test Machine control. JTAG Test Clock. The data TDI and TMS are clocked on rising edge of TCK and TDO is clocked out on the falling edge of TCK. JTAG Test Data Out. This is the serial output of the JTAG port. The data is clocked out on the falling edge of TCK. Test Data Input. This pin input is the serial data of the JTAG Test. The data on TDI is clocked on the rising edge of TCK. This pin can be left unconnected. 15 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit NAME PIN TYPE FUNCTION RESET RSTB DVDD DVSS VDDT1 VDDT2 VDDT3 VDDT4 VDDT5 VDDT6 VDDT7 VDDT8 VDDT9 VDDT10 VDDT11 VDDT12 VDDT13 VDDT14 VDDT15 VDDT16 GNDT1 GNDT2 GNDT3 GNDT4 GNDT5 GNDT6 GNDT7 GNDT8 GNDT9 GNDT10 GNDT11 GNDT12 GNDT13 GNDT14 GNDT15 GNDT16 AVDD AVSS B5 H8, J9 H9, J8 D1 G1 J1 M1 T4 T7 T9 T12 N16 K16 H16 E16 A13 A10 A8 A5 D4 H4 J4 N4 N6 N8 N9 N11 N13 J13 H13 D13 D10 D9 D8 D6 B1, C16, P1, R16, H7, J10 B2, C15, P2, R15, H10, J7 I, pullup Reset Bar. This is the asynchronous reset input bar. It is internally pulled high. A 1µs low on this pin will reset the DS26334 registers to default value. POWER SUPPLIES I 3.3V Digital Power Supply I Digital Ground I, high-Z 3.3V Power Supply for the Transmitter. All VDDT pins must be connected to VDDT, which has to be 3.3V. I Analog Ground for Transmitters I 3.3V Analog Core Power Supply. Decouple each pin separately. I Analog Core Ground 16 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5 FUNCTIONAL DESCRIPTION 5.1 5.1.1 Port Operation Serial Port Operation Setting MODESEL = ‘low’ enables the serial bus interface on the DS26334. Port read/write timing is unrelated to the system transmit and receive timing, allowing asynchronous reads or writes by the host. See Section 9.3 for the AC timing of the serial port. All serial port accesses are LSB first when BSWP pin is high and MSB first when BSWP is low. Figure 5-1 to Figure 5-3 show operation with LSB first. This port is compatible with the SPI interface defined for Motorola Processors. An example of this is the MMC2107 from Motorola. Reading or writing to the internal registers requires writing one address/command byte prior to transferring register data. The first bit written (LSB) of the address/command byte specifies whether the access is a read (1) or a write (0). The next 6 bits identify the register address (A1 to A6) (A7 is ignored). All data transfers are initiated by driving the CSB input low. When CLKE is low, SDO data is output on the rising edge of SCLK and when CLKE is high, data is output on the falling edge of SCLK. Data is held until the next falling or rising edge. All data transfers are terminated if CSB input transitions high. Port control logic is disabled and SDO is tri-stated when CSB is high. SDI is always sampled on the rising edge of SCLK. Figure 5-1. Serial Port Operation for Write Access 2 3 4 5 6 7 A1 A2 A3 A4 A5 A 6 SCLK 1 9 8 10 11 12 13 14 15 D4 D5 D6 16 CSB SDI 0 (lsb) x DO (adrs msb) (lsb) D1 D2 D3 D7 (msb) WRITE ACCESS ENABLED SDO Figure 5-2. Serial Port Operation for Read Access with CLKE = 0 SCLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CSB SDI A1 0 (lsb) SDO A2 A3 A4 A5 A6 X (msb) D0 Read Access Enabled (lsb) 17 of 121 D1 D2 D3 D4 D5 D6 D7 (msb) DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Figure 5-3. Serial Port Operation for Read Access with CLKE = 1 1 SCLK 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CSB SDI 0 SDO A1 A2 A3 A4 A5 X A6 (msb) (lsb) D0 D1 D2 (lsb) 5.1.2 D3 D4 D5 D6 D7 (msb) Parallel Port Operation When using the parallel interface on the DS26334 the user has the option for either multiplexed bus operation or nonmultiplexed bus operation. The ALE pin is pulled high in nonmultiplexed bus operation. The DS26334 can operate with either Intel or Motorola bus-timing configurations selected by MOTEL pin. This pin being high selects the Intel mode. The parallel port is only operational if MODESEL pin is pulled high. The following Table lists all the pins and their functions in the parallel port mode. See the timing diagrams in Section 9 for more details. Table 5-1. Parallel Port Mode Selection and Pin Functions MODESEL, MOTEL, MUX 100 110 101 111 5.1.3 PARALLEL HOST INTERFACE Nonmultiplexed Motorola Nonmultiplexed Intel Multiplexed Motorola Multiplexed Intel ADDRESS, DATA, AND CONTROL CSB, ACKB, DSB, RWB, ASB, A[5:0], D[7:0], INTB CSB, RDYB, WRB, RDB, ALE, A [5:0], D[7:0], INTB CSB, ACKB, DSB, RWB, ASB, AD[7:0], INTB CSB, RDYB, WRB, RDB, ALE, AD[7:0], INTB Interrupt Handling There are four sets of events that can potentially trigger an Interrupt. The interrupt functions as follows: • • • When status changes on an interruptible event, INTB pin will go low if the event is enabled through the corresponding Interrupt Enable Register. The INTB has to be pulled high externally with a 10kΩ resister for wired-OR operation. If a wired-OR operation is not required, the INTB pin can be configured to be high when not active by setting register GISC.INTM. When an Interrupt occurs the Host Processor has to read the Interrupt Status register to determine the source of the Interrupt. The read will also clear the Interrupt Status register and this will clear the output INTB pin. The Interrupt Status register can also be configured as clear on write as per register GISC.CWE. When set to clear on write, and interrupt status register bit (and the interrupt it generates) will only be cleared on writing a ‘1’ to it’s bit location in the interrupt status register. This makes is possible to clear interrupts on some bits in a register without clearing them on all bits. Subsequently the host processor can read the corresponding Status Register to check the real-time status of the event. 18 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Figure 5-4. Interrupt Handling Flow Diagram Interrupt Allowed No Interrupt Conditon Exist? Yes Read Interrupt Status Register Read Corresponding Status Register (Optional) Service the Interrupt 5.2 Power-Up and Reset Internal power-on-reset circuitry generates a reset during power-up. All registers are reset to the default values. Writing to the Software Reset Register (SWR) generates at least 1µs reset cycle, which has the same effect as the power-up reset. The DS26334 can be reset by a low going pulse on the RSTB pin (see Table 4-1). A reset can also be performed in software by writing any value to the SWR register. 5.3 Master Clock The DS26334 requires 2.048MHz ±50ppm or 1.544MHz ±50ppm or multiple thereof. The receiver uses the MCLK as a reference for clock recovery, jitter attenuation and generating RCLK during LOS. The AIS transmission uses MCLK for transmit all ones condition. See register MC to set desired incoming frequency. When the PLLE bit is set, the master clock adapter will generate both 2.048MHz (E1) and 1.544MHz (T1) clocks. If the PLLE bit is clear, both internal reference clocks will track MCLK. MCLK or RCLK can also be used to output CLKA on the LOS16 pin. Register CCR is used to select the clock generated for CLKA and the TECLK. Any RCLK can also be selected as an input to the clock generator using this same register. For a detailed description of selections available see Figure 5-5. 19 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Figure 5-5. Prescaler PLL and Clock Generator PCLKS2..0 RLCK1..8 CLKA3..0 PLLE RLOS16 PCLKI1..0 T1CLK MPS1..0 MCLK CLKAE FREQS CLK GEN Pre Scaler PLL LOS16 CLKA E1CLK TECLK LOS15 PLLE TECLKS TECLKE RLCK9..16 RLOS15 PCLKS2..0 5.4 Transmitter NRZ data arrives on TPOS and TNEG on the transmit system side. The TPOS and TNEG data is sampled on the falling edge of TCLK. The data is encoded with HDB3 or B8ZS or AMI encoding when single-rail mode is selected (only TPOS as the data source). When in single-rail mode only, BPV errors can be inserted for test purposes by register BEIR. Preencoded data is expected when dual-rail mode is selected. The encoded data passes through a jitter attenuator if it is enabled for the transmit path. A digital sequencer and DAC are used to generate transmit waveforms compliant with T1.102 and G.703 pulse masks. The line driver supports internal impedance matching for 75Ω, 100Ω, 110Ω, and 120Ω modes. The DS26334 drivers have short and open circuit driver fail monitor detection. There is an OE pin that can high impedance the transmitter outputs for protection switching when low. The individual transmitters are by default in high impedance. The OE register is used to enable the transmitters individually when the OE pin is high. The DS26334 has to have the transmitter’s enabled by setting the register and then pulling the OE pin high. The registers that control the transmitter operation are shown in Table 5-2. 20 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 5-2. Telecommunications Specification Compliance for DS26334 Transmitters TRANSMITTER FUNCTION TELECOMMUNICATIONS COMPLIANCE AMI Coding, B8ZS Substitution, DS1 Electrical Interface T1 Telecom Pulse Mask compliance T1 Telecom Pulse Mask compliance Transmit Electrical Characteristics for E1 Transmission and Return Loss Compliance ANSI T1.102 ANSI T1.403 ANSI T1.102 ITU-T G.703 Table 5-3. Registers Related to Control of DS26334 Transmitters REGISTER Transmit All Ones Enable Driver Fault Monitor Status Driver Fault Monitor Interrupt Enable Driver Fault Monitor Interrupt Status Automatic Transmit All Ones Select NAME TAOE DFMS DFMIE DFMIS ATAOS Global Configuration GC Template Select Transmitter TST Template Select TS Output Enable Configuration OE Master Clock Selection MC Single-Rail Mode Select SRMS Line Code Selection Transmit Power-Down Enable Individual Jitter Attenuator Enable Individual Jitter Attenuator Position Select Individual Jitter Attenuator FIFO Depth Select Individual Jitter Attenuator FIFO Limit Trip Individual Short-Circuit Protection Disable Short-Haul/Long-Haul Select LCS TPDE IJAE IJAPS IJAFDS IJAFLT ISCPD SHLHS Bit Error Rate Tester Control BTCR Transmit Clock Invert TCLKI BPV Error Insertion BEIR FUNCTION Transmit all ones enable. Driver fault status. Driver fault status interrupt mask. Driver fault status interrupt mask. Transmit all ones enabled automatically on LOS. Global control of jitter attenuator, line coding and short circuit protection. The transmitter that the Template Select Transmitter Register applies to. The TS2 to TS0 bits for selection of the templates for transmitter and TIMPOFF and TIMPRIM bits to control transmit impedance match. These register bits can be used to enable the transmitter outputs. Selects the MCLK frequency used for transmit and receive. This register can be used to select between single-rail and dual-rail mode. The individual transceiver line codes can be selected to overwrite the global setting. Individual transmitters can be powered down. Enables the jitter attenuator. Selects whether jitter attenuator is in transmit or receive path Selects depth of jitter attenuator FIFO. Indicates jitter attenuator FIFO within 4 bits of its useful limit. This register allows the individual transmitters to have short-circuit protection disable. This selects between short-haul and long-haul templates. This register allows mapping of the internal BERTs into an individual transmit path. Inverts TCLK input. Inserts a bipolar error in the transmit path when in singlerail mode. 21 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.4.1 Transmit Line Templates The DS26334 transmitters can be selected individually to meet the pulse masks for E1 and T1/J1 mode. The T1/J1 pulse mask is shown in the Transmit Pulse Template and can be configured on an individual LIU basis. The transmit template is selected via the TS[2:0] bits in the TS register. Transmit impedance matching is selected using the TIMPOFF and the TIMPRM bits of the same register. When transmit impedance matching is enabled TIMPRM will select between 75Ω and 120Ω impedance if an E1 template is selected, and between 100Ω and 110Ω impedance if a T1/J1 template is selected. In E1 mode, if 75Ω is selected via the TIMPRM bit, the output pulse amplitude will be 2.37V, if 120Ω is selected via the TIMPRIM bit, the output pulse amplitude will be 3.0V. The E1 pulse template is shown in Figure 5-7 and the T1 pulse template is shown in Figure 5-6. Table 5-4. Template Selections for Short-Haul Mode TS2, TS1, TS0 000 001 010 011 100 101 110 111 APPLICATION E1 Reserved DSX-1 (0–133ft) DSX-1 (133–266ft) DSX-1 (266–399ft) DSX-1 (399–533ft) DSX-1 (533–655ft) Table 5-5. Template Selections for Long-Haul Mode TS2, TS1, TS0 000 001 010 011 100 101 110 APPLICATION E1 Reserved 0dB CSU -7.5dB CSU -15dB CSU -22dB CSU 22 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Figure 5-6. T1 Transmit Pulse Templates 1 .2 1 .1 1 .0 0 .9 0 .8 NORMALIZEDAMPLITUDE 0 .7 0 .6 0 .5 0 .4 0 .3 0 .2 0 .1 0 -0 .1 T 1 .1 0 2 / 8 7 , T 1 .4 0 3 , C B 1 1 9 (O c t. 7 9 ), & I.4 3 1 T e m p la te -0 .2 -0 .3 -0 .4 -0 .5 -5 0 0 -4 0 0 -3 0 0 -2 0 0 -1 0 0 0 D S X - 1 T e m p la te (p e r A N S I T 1 .1 0 2 - 1 9 9 3 ) M A X IM U M C U R V E UI T im e Am p. - 0 .7 7 - 0 .3 9 - 0 .2 7 - 0 .2 7 - 0 .1 2 0 .0 0 0 .2 7 0 .3 5 0 .9 3 1 .1 6 -5 0 0 -2 5 5 -1 7 5 -1 7 5 -7 5 0 175 225 600 750 0 .0 5 0 .0 5 0 .8 0 1 .1 5 1 .1 5 1 .0 5 1 .0 5 - 0 .0 7 0 .0 5 0 .0 5 M IN IM U M C U R V E UI T im e Am p. - 0 .7 7 - 0 .2 3 - 0 .2 3 - 0 .1 5 0 .0 0 0 .1 5 0 .2 3 0 .2 3 0 .4 6 0 .6 6 0 .9 3 1 .1 6 -5 0 0 -1 5 0 -1 5 0 -1 0 0 0 100 150 150 300 430 600 750 - 0 .0 5 - 0 .0 5 0 .5 0 0 .9 5 0 .9 5 0 .9 0 0 .5 0 - 0 .4 5 - 0 .4 5 - 0 .2 0 - 0 .0 5 - 0 .0 5 100 200 T IM E (n s ) 300 400 500 600 D S 1 T e m p l a t e ( p e r A N S I T 1 .4 0 3 - 1 9 9 5 ) M A X IM U M C U R V E UI T im e Am p. - 0 .7 7 - 0 .3 9 - 0 .2 7 - 0 .2 7 - 0 .1 2 0 .0 0 0 .2 7 0 .3 4 0 .7 7 1 .1 6 23 of 121 -5 0 0 -2 5 5 -1 7 5 -1 7 5 -7 5 0 175 225 600 750 0 .0 5 0 .0 5 0 .8 0 1 .2 0 1 .2 0 1 .0 5 1 .0 5 - 0 .0 5 0 .0 5 0 .0 5 M IN IM U M C U R V E UI T im e Am p. - 0 .7 7 - 0 .2 3 - 0 .2 3 - 0 .1 5 0 .0 0 0 .1 5 0 .2 3 0 .2 3 0 .4 6 0 .6 1 0 .9 3 1 .1 6 -5 0 0 -1 5 0 -1 5 0 -1 0 0 0 100 150 150 300 430 600 750 - 0 .0 5 - 0 .0 5 0 .5 0 0 .9 5 0 .9 5 0 .9 0 0 .5 0 - 0 .4 5 - 0 .4 5 - 0 .2 6 - 0 .0 5 - 0 .0 5 700 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Figure 5-7. E1 Transmit Pulse Templates 1.2 1.1 269ns SCALED AMPLITUDE (in 75 ohm systems, 1.0 on the scale = 2.37Vpeak in 120 ohm systems, 1.0 on the scale = 3.00Vpeak) 1.0 0.9 0.8 0.7 G.703 Template 194ns 0.6 0.5 219ns 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -250 -200 -150 -100 0 -50 TIME (ns) 24 of 121 50 100 150 200 250 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.4.2 LIU Transmit Front-End It is recommended that the LIU for the transmitter be configured as described in Figure 5-8 and in Table 5-6. Figure 5-8. LIU Front-End 3.3V TFt 1:2 Dt VDDTn C1 TTIP Dt C2 Tx Line Ct Dt GNDTn TRING Dt (One Channel) 3.3V AVDDn C3 RTIP C4 C5 A75 A100 A110 AVSSn RRING Dt optional Rt Dt Rt Dt termination 3.3V TVS1 25 of 121 Dt TFr 1:1 or 1:2 Rx Line DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 5-6. LIU Front-End Values MODE COMPONENT Tx Capacitance Ct Tx Protection Dt Rx Transformer RTR 1:1 TFr Tx Transformer 1:2 TFt Rx Transformer RTR 1:2 Tx Transformer 1:2 Tx Decoupling (TVDDn) Tx Decoupling (TVDDn) Rx Decoupling (AVDD) Rx Decoupling (AVDD) Rx Termination Rx Termination RTR 1:1 Rx Termination RTR 1:2 Voltage Protection 1 1 TFr TFt C1 C2 C3 C4 C51 Rt1 Rt1 TVS1 75Ω COAX, 120Ω TWISTED PAIR, 100/110Ω TWISTED PAIR 560pF typical. Adjust for board parasitics for optimal return loss. International Rectifier 11DQ04 or 10BQ060, Motorola MBR0540T1 Pulse TX1475 (recommended for both short/long-haul modes), Halo TG83-S005NU (recommended for short-haul only) Pulse T1124 (0°C to +70°C), Pulse T1114 (-40°C to 85°C) Common decoupling for all 16 channels = 68µF. Recommended decoupling per channel = 0.1µF. Common decoupling for all 16 channels = 68µF. Decouple all six pins separately with a 0.1µF capacitor. Rx capacitance for all 16 channels = 0.1µF. Need two resistors = 60.4Ω ±1%. Need two resistors = 15.0Ω ±1%. SGS-Thomson SMLVT 3V3 (3.3V Transient Suppressor) Only use if necessary for application. 5.4.3 Transmit Dual-Rail Mode Transmit dual-rail mode consists of the TPOS, TNEG, and TCLK pins on the system side. NRZ data is sampled on the falling edge of TCLK as shown in Figure 9-12. B8ZS or HDB3 encoding is not available in transmit dual-rail mode. The data that appears on the TPOS and TNEG pins is output on TTIP and TRING without any modification. The Single-Rail Mode Select Register (SRMS) is used for selection of dual-rail or single-rail mode. The data that arrives at the TPOS and TNEG can be overwritten in the maintenance mode by setting the BERT Control Register (BTCR). 5.4.4 Transmit Single-Rail Mode Transmit single-rail mode consists of the TPOS and TCLK pins on the system side (TNEG is not used.). NRZ data is sampled on the falling edge of TCLK as shown in Figure 9-12. The zero substitution B8ZS or HDB3 encoding is allowed. The TPOS data is encoded in AMI or B8ZS/HDB3 format on the TTIP and TRING pins after pulse shaping. The Single-Rail Mode Select Register (SRMS) is used for selection of dual-rail or single-rail mode. The data that arrives at the TPOS can be overwritten in the maintenance mode by setting in Bit Error Rate Tester Control Register (BTCR). 5.4.5 Zero Suppression—B8ZS or HDB3 B8ZS coding is available when the device is in T1 mode (selected by TS2, TS1 and TS0 bits in the TS register). B8ZS/HDB3 coding are enabled by default in single-rail mode. Setting the LCS bit in the LCS Register disables B8ZS/HDB3. Note that if the individual LIU is configured in E1 mode then HDB3 code substitution will be selected. B8ZS substitution is defined in ANSI T1.102 and HDB3 in ITU-T G.703 standards. 5.4.6 Transmit Power-Down The transmitter will be powered down if the relevant bits in the TPDE are set. The TTIP/TRING outputs will be high impedance when TPDE is set. 26 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.4.7 Transmit All Ones When Transmit All Ones is invoked, continuous ones are transmitted using MCLK as the timing reference. Data input at TPOS and TNEG is ignored. Transmit All Ones can be sent by setting bits in the TAOE Register. Also, Transmit All Ones will be enabled if bits in ATAOS are set and the corresponding receiver goes into LOS state in status register LOSS. 5.4.8 Driver Fail Monitor The Driver Fail Monitor is connected to the TTIP and TRING pins. It will detect a short or open circuit on the secondary side of the transmit transformer. The drive current will be limited to 50mA if a short circuit is detected. The DFMS status registers and the corresponding interrupt and enable registers can be used to monitor the driver failure. 5.5 Receiver The DS26334’s 16 receivers are all identical. A 1:2 or 1:1 transformer can be used on the receive side (selected by the RTR bit), but only a 1:1 transformer can be used if fully internal impedance match is enabled. Fully internal receive impedance match does not require the use of any external resistor on the receive line. If partially internal impedance matching is selected, the DS26334 will need only an external 120Ω resistor (30Ω for a 1:2 transformer) for E1, T1, and J1. The receive impedance match settings are controlled by the transmit template/impedance selection. See Figure 5-8 and Table 5-6 for external component values. Partially internal impedance matching is enabled via the TS.RIMPON bit. Fully internal impedance matching is enabled by setting GC.RIMPMS and TS.RIMPON. The peak detector and data slicer process the received signal. The output of the data slicer goes to clock and data recovery. A 2.048/1.544 PLL is internally multiplied by 16 via another internal PLL and fed to the clock recovery system derives E1 or T1 clock. The clock recovery system uses the clock from the PLL circuit to form a 16 times oversampler, which is used to recover the clock and data. This oversampling technique offers outstanding performance to meet jitter tolerance specifications. B8ZS/HDB3/AMI decoding is available when single-rail mode is selected. The selection of single-rail or dual rail is done by settings in the SRMS register. The receiver is capable of recovering signals up to 36dB worth of attenuation for T1 mode, and up to 43dB for E1 mode. The receiver contains functionality to provide resistive gain up to 32dB for monitor mode. Three receive termination modes are available: 1) External Impedance Matching. Internal impedance matching is disabled, external resistor should match line impedance. 2) Partially Internal Impedance Matching. Internal impedance matching is enabled, in parallel with an external termination resistor (one value for all terminations). 3) Fully Internal Impedance Matching. Internal impedance matching is enabled, no external termination necessary. This mode requires a 1:1 receive-side transformer. 5.5.1 Receiver Impedance Matching Calibration In fully internal impedance matching mode, calibration of the internal resistors is necessary to match the line impedance accurately. Calibration must be done upon power-up of the device. The resistance of the internal resistors does vary across temperature. Therefore, it may be necessary to recalibrate if the ambient temperature changes more than 30°C. The user may conclude that it is necessary to recalibrate on a periodic basis if he expects such temperature swings. Calibration is not necessary for partially internal impedance match mode. 5.5.2 Receiver Monitor Mode The receive equalizer is equipped with monitor mode function that allows for resistive gain up to 32dB, along with cable attenuation of 6dB to 24dB as shown in the RSMM1–4 registers. 27 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.5.3 Peak Detector and Slicer The slicer determines the polarity and presence of the received data. The output of the slicer is sent to the clock and data recovery circuitry for extraction of data and clock. The slicer has a built-in peak detector for determination of the slicing threshold. 5.5.4 Receive Level Indicator The DS26334 will report the signal strength at RTIP and RRING in increments described in Table 6-17 via register bits CnRL3–CnRL0 located in the RSL1–4 registers. 5.5.5 Clock and Data Recovery The resultant E1 or T1 clock derived from the 2.048/1.544 PLL is internally multiplied by 16 via another internal PLL and fed to the clock recovery system. The clock recovery system uses the clock from the PLL circuit to form a 16 times oversampler, which is used to recover the clock and data. This oversampling technique offers outstanding performance to meet jitter tolerance specifications. 5.5.6 Loss of Signal The DS26334 uses both the digital and analog loss-detection method in compliance with the latest ANSI T1.231 for T1/J1 and ITU-T G.775 or ETS 300 233 for E1 mode of operation. LOS is detected if the receiver level falls bellow a threshold analog voltage for certain duration. Alternatively, this can be termed as having received “zeros” for certain duration. The signal level and timing duration are defined in accordance with the ANSI T1.231, ITU-T G.775, or ETS 300 233 specifications. For short-haul mode, the loss detection thresholds are based on cable loss of 18dB for both T1 and E1 modes. For long-haul mode, the LOS detection threshold is based on cable loss of 38dB for T1 mode and 45dB for E1 mode. RCLK is replaced by MCLK when the receiver detects a loss of signal. If the AISEL bit is set in the GC register or the IAISEL bit is set, the RPOS/RNEG data is replaced by AIS. The loss state is exited when the receiver detects a certain number of ones density at a higher signal level than the loss detection level. The loss detection signal level and loss reset signal level are defined with a hysteresis to prevent the receiver from bouncing between “LOS” and “no LOS” states. Table 5-7 outlines the specifications governing the loss function. Table 5-7. Loss Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications CRITERIA Loss Detection Criteria T1.231 No pulses are detected for 175 ±75 bits. STANDARD ITU-T G.775 No pulses are detected for duration of 10 to 255 bit periods. ETS 300 233 No pulses are detected for a duration of 2048 bit periods or 1ms. Loss is terminated if a duration of 12.5% ones are detected over duration of 175 ±75 bits. Loss Reset Criteria Loss is not terminated if 8 consecutive zeros are found if B8ZS encoding is used. If B8ZS is not used loss is not terminated if 100 consecutive pulses are zero. The incoming signal has transitions for duration of 10 to 255 bit periods. 28 of 121 Loss reset criteria is not defined. DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.5.6.1 ANSI T1.231 for T1 and J1 Modes For short-haul mode, loss is detected if the received signal level is less than 200mV for duration of 192 bit periods. LOS is reset if the all of the following criteria are met: • 24 or more ones are detected in 192-bit period with a detection threshold of 300mV measured at RTIP and RRING. • During the 192 bits less than 100 consecutive zeros are detected. • 8 consecutive zeros are not detected if B8ZS is set. For long-haul mode, loss is detected if the received signal level is less than 30mV for duration of 192 bit periods. LOS is reset if the all of the following criteria are met: • 24 or more ones are detected in 192-bit period with a detection threshold of 40mV measured at RTIP and RRING. During the 192 bits less than 100 consecutive zeros are detected. 8 consecutive zeros are not detected if B8ZS is set. • • 5.5.6.2 ITU-T G.775 for E1 Modes For short-haul mode, LOS is detected if the received signal level is less than 200mV for a continuous duration of 192 bit periods. LOS is reset if the receive signal level is greater than 300mV for a duration of 192 bit periods. For long-haul mode, LOS is detected if the received signal level is less than 12mV for a continuous duration of 192 bit periods. LOS is reset if the receive signal level is greater than 20mV for a duration of 192 bit periods. 5.5.6.3 ETS 300 233 for E1 Modes For short-haul mode, LOS is detected if the received signal level is less than 200mV for a continuous duration of 2048 (1ms) bit periods. LOS is reset if the receive signal level is greater than 300mV for a duration of 192 bit periods. For long-haul mode, LOS is detected if the received signal level is less than 12mV for a continuous duration of 192 bit periods. LOS is reset if the receive signal level is greater than 20mV for a duration of 192 bit periods. 5.5.7 AIS Table 5-8 outlines the DS26334 AIS related specifications. Table 5-9 states the AIS functionality in the DS26334. The registers related to the AIS detection are shown in Table 5-10. Table 5-8. AIS Criteria ANSI T1.231, ITU-T G.775, and ETS 300 233 Specifications CRITERIA ITU-T G.775 for E1 STANDARD ETS 300 233 for E1 AIS Detection Criteria 2 or fewer zeros in each of 2 consecutive 512-bit stream received. Fewer than 3 zeros detected in 512 bit period. AIS Clearance Criteria 3 or more zeros in each of 2 consecutive 512-bit streams received. 3 or more zeros in 512 bits received. ANSI T1.231 for T1 Fewer than 9 zeros detected in a 8192-bit period (a ones density of 99.9% over a period of 5.3ms) are received. 9 or more zeros detected in a 8192-bit period are received. Table 5-9. AIS Detection and Reset Criteria for DS26334 CRITERIA AIS Detection Criteria AIS Clearance Criteria ITU-T G.775 for E1 2 or fewer zeros in each of 2 consecutive 512-bit streams received. 3 or more zeros in each of 2 consecutive 512-bit streams received. STANDARD ETS 300 233 for E1 ANSI T1.231 for T1 Fewer than 3 zeros detected in 512-bit period. Fewer than 9 zeros contained in 8192 bits. 3 or more zeros in 512 bits received. 9 or more bits received in a 8192-bit stream. 29 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 5-10. Registers Related to AIS Detection REGISTER NAME LOS/AIS Criteria Selection Alarm Indication Signal Status AIS Interrupt Enable AIS Interrupt Status 5.5.8 LASCS AIS AISIE AISI FUNCTIONALITY Section criteria for AIS (T1.231, G.775, ETS 300 233 for E1). Set when AIS is detected. If reset, interrupt due to AIS is not generated. Latched if there is a change in AIS and the interrupt is enabled. Receive Dual-Rail Mode Receive dual-rail mode consists of the RPOS, RNEG, and RCLK pins on the system side. In receive dual-rail mode, B8ZS and HDB3 decoding is not available. The data that appears on the RTIP and RRING pins is output on RPOS and RNEG without any modification. The Single-Rail Mode Select Register (SRMS) is used for selection of dual-rail or single-rail mode. The bipolar violation (and B8ZS/HDB3) detectors detect violations in dual-rail and single-rail modes, but in dual-rail mode the violations will only be reported to the Line Violation Detect Status (LVDS) registers. 5.5.9 Receive Single-Rail Mode Receive single-rail mode consists of the RPOS, RCLK, and CV pins on the system side. B8ZS or HDB3 decoding is available. The Single-Rail Mode Select Register (SRMS) is used for selection of dual-rail or single-rail mode. 5.5.10 Bipolar Violation and Excessive Zero Detector The DS26334 detects HDB3 code violations, BPVs, and excessive zero errors. The reporting of the errors is done through the RNEGn/CVn pin in single-rail mode and the LVDS registers in both single- and dual-rail modes. Code violations are only detected in E1 mode with HDB3 encoding. The code violation detection declares an error when a bipolar violation of the same polarity as the last bipolar violation is received. Excessive zeros are detected if eight consecutive zeros are detected with B8ZS enabled and four consecutive zeros are detected with HDB3 enabled. Excessive zero detection is enabled via the Excessive Zero Detect Enable Register (EZDE) and when HDB3/B8ZS encoding/decoding is selected via the Line Code Selection Register (LCS). The bits in the LCS, EZDE, and CVDEB registers determine the combinations that are reported. Table 5-11 outlines the functionality. Table 5-11. BPV, Code Violation, and Excessive Zero Error Reporting CONDITIONS LCS 0 0 0 0 1 EZDE 0 0 1 1 X ERRORS DETECTED CVDEB 0 1 0 1 X BPV (T1)/Code Violation (E1) BPV Excessive Zeros and BPV (T1)/Code Violation (E1) Excessive Zeros and BPV BPV 30 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.6 Jitter Attenuator The DS26334 contains an on-board jitter attenuator that can be set to a depth of either 32 or 128 bits via the JADS bit in register GC. It can also be controlled on an individual LIU basis by settings in the IJAFDS register. The 128-bit mode is used in applications where large excursions of wander are expected. The 32-bit mode is used in delay sensitive applications. The characteristics of the attenuation are shown in Figure 5-9. The jitter attenuator can be placed in either the receive path or the transmit path or none by appropriately setting the JAPS and the JAE bits in register GC. These selections can be changed on an individual LIU basis by settings in the IJAPS and IJAE. In order for the jitter attenuator to operate properly, a 2.048MHz clock or multiple thereof, or 1.544MHz clock or multiple thereof, must be applied at MCLK. ITU-T specification G.703 requires an accuracy of ±50ppm for both T1 and E1 applications. AT&T Pub 62411 and ANSI specs require an accuracy of ±32ppm for T1 interfaces. On-board circuitry adjusts either the recovered clock from the clock/data recovery block or the clock applied at the TCLK pin to create a smooth jitter-free clock, which is used to clock data out of the jitter attenuator FIFO. It is acceptable to provide a jittery clock at the TCLK pin if the jitter attenuator is placed on the transmit side. If the incoming jitter exceeds either 120UIP-P (buffer depth is 128 bits) or 28UIP-P (buffer depth is 32 bits), the DS26334 will divide the internal nominal 32.768MHz (E1) or 24.704MHz (T1) clock by either 15 or 17 instead of the normal 16 to keep the buffer from overflowing. When the device divides by either 15 or 17, it also sets the jitter attenuator limit trip (IJAFLT) bits in the IJAFLT register described. Figure 5-9. Jitter Attenuation ITU G.7XX Prohibited Area TBR12 Prohibited Area -20dB C ve ur A E1 T1 -40dB TR 62411 (Dec. 90) Prohibited Area Cu rve JITTER ATTENUATION (dB) 0dB B -60dB 1 10 100 1K FREQUENCY (Hz) 31 of 121 10K 100K DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.7 G.772 Monitor In this application, only 14 transceivers are functional and two transceivers are used for nonintrusive monitoring of input and output of the other 14 channels. Channel 9 is used for 10 to 16 channels and Channel 1 is used for 2 to 8 channels. G.772 monitoring is configured by the BERT and G.772 Monitoring Control Register (BGMC) (see Table 6-9). While monitoring, Channel 1 can be configured in remote loopback and the monitored signal can be output on TTIP1 and TRING1. While monitoring, Channel 9 can be configured in remote loopback and the monitored signal can be output on TTIP9 and TRING9. 5.8 Loopbacks The DS26334 provides four loopbacks for diagnostic purposes: analog loopback, digital loopback, remote loopback, and dual loopback. Dual loopback is accomplished by turning on digital loopback and remote loopback at the same time. 5.8.1 Analog Loopback The analog output of the transmitter TTIP and TRING is looped back to RTIP and RRING of the receiver. Data at RTIP and RRING is ignored in analog loopback. This is shown in Figure 5-10. Figure 5-10. Analog Loopback TCLK TPOS TNEG RCLK RPOS RNEG H D B 3 / B 8 Z S E n c o d e r H D B 3 / B 8 Z S D e c o d e r O p tio n a l J itt e r A tte n u a to r T r a n s m it D ig it a l O p t io n a l J it te r A tte n u a to r R e c e iv e D ig i ta l 32 of 121 T ra n s m it A n a lo g R e c e iv e A n a lo g Line Driver Rtip Rring DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.8.2 Digital Loopback The transmit system data TPOS, TNEG, and TCLK will be looped back to output on RCLK, RPOS, and RNEG. The data input at TPOS and TNEG is output on TTIP and TRING. All ones can also be output when selected by the Transmit All Ones Enable Register (TAOE). Signals at RTIP and RRING will be ignored. This loopback is conceptually shown in Figure 5-11. Figure 5-11. Digital Loopback TCLK TPOS TNEG RCLK RPOS RNEG 5.8.3 TTIPTPOS H D B 3 / B 8 Z S E n c o d e r O p tio n a l J itt e r A tte n u a to r H D B 3 / B 8 Z S D e c o d e r O p t io n a l J it te r A tte n u a to r T r a n s m it D ig it a l R e c e iv e D ig i ta l T ra n s m it A n a lo g Line Driver TRING TNEG RTIP R e c e iv e A n a lo g RRING Remote Loopback The inputs at RTIP and RRING are looped back to TTIP and TRING. The inputs at TCLK, TPOS, and TNEG are ignored during a remote loopback. This loopback is conceptually shown in Figure 5-12. Note: Remote loopback does not take precedence over transmit power-down and requires TCLK to operate. The transmitters will use the recovered RCLK in remote loopback. TCLK is still required because if it is removed the transmitters will power-down (TCLK held low) or transmit all ones (TCLK held high). Figure 5-12. Remote Loopback TCLK TPOS TNEG RCLK RPOS RNEG TTIP TPOS H D B 3 / B 8 Z S E n c o d e r O p tio n a l J itt e r A tte n u a to r H D B 3 / B 8 Z S D e c o d e r O p t io n a l J it te r A tte n u a to r T r a n s m it D ig it a l R e c e iv e D ig i ta l 33 of 121 T ra n s m it A n a lo g Line Driver TRING TNEG RTIP R e c e iv e A n a lo g RRING DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.9 BERT There are two bit error-rate testers available on the DS26334. One BERT can be mapped into LIUs 1–8 and the other into LIUs 9–16 via the BTCR registers. The two BERTs operate independently of each other. Each BERT transmitter, by default, replaces data from TPOS and TNEG; each BERT receiver, by default, samples recovered data from RTIP and RRING. The BERT can be enabled to replace data received on RTIP and RRING via the BERTDIR bit in the BERT and G.772 Monitoring Control Register (BGMC). In this mode, the SRMS bit determines whether data comes out singlerail or dual-rail. BERT data can be sourced using the recovered clock, MCLK, or TCLK. In this mode of operation, the BERT receiver samples data on TPOS and TNEG on the falling edge of TCLK. This function is useful for testing the digital side of the LIU. If TCLK is selected as a source for this mode, the input TCLK will control the BERT transmitter and receiver. If the recovered clock or MCLK is selected, the RCLK output needs to drive the TCLK input in order for the BERT receiver to sync to the data. 5.9.1 General Description The BERT is a software-programmable test pattern generator and monitor capable of meeting most error performance requirements for digital transmission equipment. It will generate and synchronize to pseudorandom n y patterns with a generation polynomial of the form x + x + 1, where n and y can take on values from 1 to 32 and repetitive patterns of any length up to 32 bits. The transmit direction generates the programmable test pattern, and inserts the test pattern payload into the data stream. The receive direction extracts the test pattern payload from the receive data stream, and monitors the test pattern payload for the programmable test pattern. 5.9.1.1 • • • • • BERT Features n y Programmable PRBS Pattern. The pseudorandom bit sequence (PRBS) polynomial (x + x + 1) and n seed are programmable (length n = 1 to 32, tap y = 1 to n – 1, and seed = 0 to 2 – 1). Programmable Repetitive Pattern. The repetitive pattern length and pattern are programmable (the n length n = 1 to 32 and pattern = 0 to 2 – 1). 24-Bit Error Count and 32-Bit Bit Count Registers Programmable Bit-Error Insertion. Errors can be inserted individually, on a pin transition, or at a specific rate. The rate 1/10n is programmable (n = 1 to 7). -3 Pattern Synchronization at a 10 BER. Pattern synchronization is achieved even in the presence of a -3 random bit error rate (BER) of 10 . 34 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.9.2 Configuration and Monitoring Set BTCR.BERTE = 1 to enable the BERT. The following tables show how to configure the on-board BERT to send and receive common patterns. Table 5-12. Pseudorandom Pattern Generation PATTERN TYPE 9 2 -1 O.153 (511 type) 11 2 -1 O.152 and O.153 (2047 type) 215-1 O.151 PTF[4:0] (hex) 04 BPCR REGISTER PLF[4:0] PTS (hex) 08 0 QRSS BERT. PCR BERT. SPR2 BERT. SPR1 0 0x0408 0xFFFF 0xFFFF BERT.CR TPIC, RPIC 0 08 0A 0 0 0x080A 0xFFFF 0xFFFF 0 0D 0E 0 0 0x0D0E 0xFFFF 0xFFFF 1 20 10 13 0 0 0x1013 0xFFFF 0xFFFF 0 20 02 13 0 1 0x0253 0xFFFF 0xFFFF 0 23 11 16 0 0 0x1116 0xFFFF 0xFFFF 1 2 -1 O.153 2 -1 O.151 QRSS 2 -1 O.151 Table 5-13. Repetitive Pattern Generation PATTERN TYPE All Ones BPCR REGISTER PTF[4:0] PLF[4:0] PTS (hex) (hex) NA 00 1 QRSS BERT. PCR BERT. SPR2 BERT. SPR1 0 0x0020 0xFFFF 0xFFFF All Zeros NA 00 1 0 0x0020 0xFFFF 0xFFFE Alternating Ones and Zeros NA 01 1 0 0x0021 0xFFFF 0xFFFE Double Alternating and Zeros NA 03 1 0 0x0023 0xFFFF 0xFFFC 3 in 24 NA 17 1 0 0x0037 0xFF20 0x0022 1 in 16 NA 0F 1 0 0x002F 0xFFFF 0x0001 1 in 8 NA 07 1 0 0x0027 0xFFFF 0xFF01 1 in 4 NA 03 1 0 0x0023 0xFFFF 0xFFF1 After configuring these bits, the pattern must be loaded into the BERT. This is accomplished via a zero-to-one transition on BCR.TNPL and BCR.RNPL Monitoring the BERT requires reading the BSR register, which contains the Bit Error Count (BEC) bit and the Out of Synchronization (OOS) bit. The BEC bit will be one when the bit error counter is one or more. The OOS will be one when the receive pattern generator is not synchronized to the incoming pattern, which will occur when it receives a minimum 6 bit errors within a 64-bit window. The Receive BERT Bit Count Register (RBCR) and the Receive BERT Bit Error Count Register (RBECR) will be updated upon the reception of a Performance Monitor Update signal (e.g., BCR.LPMU). This signal will update the registers with the values of the counters since the last update and will reset the counters. 35 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.9.3 Receive Pattern Detection The Receive BERT receives only the payload data and synchronizes the receive pattern generator to the incoming pattern. The receive pattern generator is a 32-bit shift register that shifts data from the least significant bit (LSB) or bit 1 to the most significant bit (MSB) or bit 32. The input to bit 1 is the feedback. For a PRBS pattern (generating n y polynomial x + x + 1), the feedback is an XOR of bit n and bit y. For a repetitive pattern (length n), the feedback is bit n. The values for n and y are individually programmable (1 to 32). The output of the receive pattern generator is the feedback. If QRSS is enabled, the feedback is an XOR of bits 17 and 20, and the output will be forced to one if the next 14 bits are all zeros. QRSS is programmable (on or off). For PRBS and QRSS patterns, the feedback will be forced to one if bits 1 through 31 are all zeros. Depending on the type of pattern programmed, pattern detection performs either PRBS synchronization or repetitive pattern synchronization. 5.9.3.1 Receive PRBS Synchronization PRBS synchronization synchronizes the receive pattern generator to the incoming PRBS or QRSS pattern. The receive pattern generator is synchronized by loading 32 data stream bits into the receive pattern generator, and then checking the next 32 data stream bits. Synchronization is achieved if all 32 bits match the incoming pattern. If at least six incoming bits in the current 64-bit window do not match the receive pattern generator, automatic pattern re-synchronization is initiated. Automatic pattern re-synchronization can be disabled. See Figure 5-13 for the PRBS synchronization diagram. Figure 5-13. PRBS Synchronization State Diagram Sync th wi sw ith its ou 4b f6 t er ror s 6o 32 bit ors err 1 bit error Verify Load 32 bits loaded 36 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.9.3.2 Receive Repetitive Pattern Synchronization Repetitive pattern synchronization synchronizes the receive pattern generator to the incoming repetitive pattern. The receive pattern generator is synchronized by searching each incoming data stream bit position for the repetitive pattern, and then checking the next 32 data stream bits. Synchronization is achieved if all 32 bits match the incoming pattern. If at least six incoming bits in the current 64-bit window do not match the receive PRBS pattern generator, automatic pattern re-synchronization is initiated. Automatic pattern re-synchronization can be disabled. See Figure 5-14 for the repetitive pattern synchronization state diagram. Figure 5-14. Repetitive Pattern Synchronization State Diagram Sync th wi sw ith its ou 4b f6 t er ror s 6o 32 bit ors err 1 bit error Verify Match Pattern Matches 5.9.3.3 Receive Pattern Monitoring Receive pattern monitoring monitors the incoming data stream for both an OOS condition and bit errors and counts the incoming bits. An Out Of Synchronization (OOS) condition is declared when the synchronization state machine is not in the “Sync” state. An OOS condition is terminated when the synchronization state machine is in the “Sync” state. Bit errors are determined by comparing the incoming data stream bit to the receive pattern generator output. If they do not match, a bit error is declared, and the bit error and bit counts are incremented. If they match, only the bit count is incremented. The bit count and bit error count are not incremented when an OOS condition exists. 37 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 5.9.4 Transmit Pattern Generation Pattern generation generates the outgoing test pattern, and passes it onto error insertion. The transmit pattern generator is a 32-bit shift register that shifts data from the least significant bit (LSB) or bit 1 to the most significant n y bit (MSB) or bit 32. The input to bit 1 is the feedback. For a PRBS pattern (generating polynomial x + x + 1), the feedback is an XOR of bit n and bit y. For a repetitive pattern (length n), the feedback is bit n. The values for n and y are individually programmable (1 to 32). The output of the receive pattern generator is the feedback. If QRSS is enabled, the feedback is an XOR of bits 17 and 20, and the output will be forced to one if the next 14 bits are all zeros. QRSS is programmable (on or off). For PRBS and QRSS patterns, the feedback will be forced to one if bits 1 through 31 are all zeros. When a new pattern is loaded, the pattern generator is loaded with a seed/pattern value n before pattern generation starts. The seed/pattern value is programmable (0 – 2 – 1). 5.9.4.1 Transmit Error Insertion Error insertion inserts errors into the outgoing pattern data stream. Errors are inserted one at a time or at a rate of one out of every 10n bits. The value of n is programmable (1 to 7 or off). Single bit error insertion can be initiated from the microprocessor interface, or by the manual error insertion input (TMEI). The method of single error insertion is programmable (register or input). If pattern inversion is enabled, the data stream is inverted before the overhead/stuff bits are inserted. Pattern inversion is programmable (on or off). 38 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 6 REGISTER MAPS AND DEFINITION Six address bits are used to control the settings of the registers. In the parallel nonmultiplexed mode address [5:0] is used. In multiplexed mode AD[5:0] is used and A[6:1] is used in the serial mode. The register space contains two independent sets of registers. The lower set of registers (LIUs 1–8) is located from address 00 hex to 1F hex and contains controls for LIUs 1–8. The upper set of registers (LIUs 9–16) is a duplicate of the lower set, located from address 20 hex to 3F hex that controls LIUs 9–16. Each of these sets of registers consists of four banks: Primary, Secondary, Individual LIU, and BERT. The ADDP register for the lower set of registers (LIUs 1–8) is located at address 1F hex. This register is used as a pointer to access the 4 banks of registers in the lower (LIUs 1–8) register set. Similarly, the ADDP register for the upper set of registers (LIUs 9–16) is located at address 3F hex. This register is used as a pointer to access the four banks of registers in the upper (LIUs 9–16) register set. Setting an ADDP register to AA hex will access the secondary bank of registers, 01 hex will access the Individual LIU bank of registers, 02 hex will access the BERT bank of registers, and 00 hex (default on power-up) will access the Primary bank of registers. Note that bank selection for the lower set of registers (LIUs 1–8) is controlled only by the ADDP at 1F hex and that bank selection for the upper set of registers (LIUs 9–16) is controlled only by the ADDP at 3F hex. 39 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-1. Primary Register Set REGISTER Identification Analog Loopback Control Remote Loopback Control Transmit All Ones Enable Loss of Signal Status Driver Fault Monitor Status Loss of Signal Interrupt Enable Driver Fault Monitor Interrupt Enable Loss of Signal Interrupt Status Driver Fault Monitor Interrupt Status Software Reset BERT and G.772 Monitoring Control Digital Loopback Control LOS/AIS Criteria Selection Automatic Transmit All Ones Select Global Configuration Template Select Transmitter Template Select Output Enable Configuration Alarm Indication Signal Status AIS Interrupt Enable AIS Interrupt Status Reserved Address Pointer for Bank Selection NAME HEX FOR CH 1–8 ID ALBC RLBC TAOE LOSS DFMS LOSIE DFMIE LOSIS DFMIS SWR BGMC DLBC LASCS ATAOS GC TST TS OE AIS AISIE AISI 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 — 16–1E ADDP 1F ADDRESS FOR CH 1–8 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) xx000000 xx000001 xx000010 xx000011 xx000100 xx000101 xx000110 xx000111 xx001000 xx001001 xx001010 xx001011 xx001100 xx001101 xx001110 xx001111 xx010000 xx010001 xx010010 xx010011 xx010100 xx010101 xx010110– xx011110 xx011111 40 of 121 x000000 x000001 x000010 x000011 x000100 x000101 x000110 x000111 x001000 x001001 x001010 x001011 x001100 x001101 x001110 x001111 x010000 x010001 x010010 x010011 x010100 x010101 x010110– x011110 x011111 HEX FOR CH 9–16 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36–3E 3F ADDRESS FOR CH 9–16 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) Not used xx100001 xx100010 xx100011 xx100100 xx100101 xx100110 xx100111 xx101000 xx101001 xx101010 xx101011 xx101100 xx101101 xx101110 xx101111 xx110000 xx110001 xx110010 xx110011 xx110100 xx110101 xx110110– x111110 xx111111 Not used x100001 x100010 x100011 x100100 x100101 x100110 x100111 x101000 x101001 x101010 x101011 x101100 x101101 x101110 x101111 x110000 x110001 x110010 x110011 x110100 x110101 x110110– x111110 x111111 RW R RW RW RW R R RW RW R R W RW RW RW RW RW RW RW RW R RW R — RW DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-2. Secondary Register Set REGISTER Single-Rail Mode Select Line Code Selection Not Used Receive Power-Down Enable Transmit Power-Down Enable Excessive Zero Detect Enable Code Violation Detect Enable Bar Not Used Address Pointer for Bank Selection NAME HEX FOR CH 1–8 SRMS LCS — RPDE TPDE EZDE CVDEB 00 01 02 03 04 05 06 — 07–1E ADDP 1F ADDRESS FOR CHANNELS 1–8 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) xx000000 xx000001 xx000010 xx000011 xx000100 xx000101 xx000110 xx000111– xx011110 xx011111 41 of 121 x000000 x000001 x000010 x000011 x000100 x000101 x000110 x000111– x011110 x011111 HEX FOR CH 9–16 20 21 22 23 24 25 26 27–3E 3F ADDRESS FOR CHANNELS 9–16 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) xx100000 xx100001 xx100010 xx100011 xx100100 xx100101 xx100110 xx100111– xx111110 xx111111 x100000 x100001 x100010 x100011 x100100 x100101 x100110 x100111– x111110 x111111 RW RW R R RW RW R R W RW DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-3. Individual LIU Register Set REGISTER Individual Jitter Attenuator Enable Individual Jitter Attenuator Position Select Individual Jitter Attenuator FIFO Depth Select Individual Jitter Attenuator FIFO Limit Trip Individual Short-Circuit Protection Disable Individual AIS Select Master Clock Select Short-Haul/Long-Haul Select Receive Sensitivity Monitor Mode 1–4 ADDRESS FOR CHANNELS 1–8 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) ADDRESS FOR CHANNELS 9–16 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) NAME HEX FOR CH 1–8 IJAE 00 xx000000 x000000 20 xx100000 x100000 RW IJAPS 01 xx000001 x000001 21 xx100001 x100001 RW IJAFDS 02 xx000010 x000010 22 xx100010 x100010 RW IJAFLT 03 xx000011 x000011 23 xx100011 x100011 R ISCPD 04 xx000100 x000100 24 xx100100 x100100 RW IAISEL MC SHLHS RSMM1, RSMM2, RSMM3, RSMM4 05 06 07 xx000101 xx000110 xx000111 x000101 x000110 x000111 25 26 27 xx100101 Not used xx100111 x100101 Not used x100111 RW RW RW 08–0B xx001000– xx001011 x001000– x001011 28–2B xx101000– xx101011 x101000– x101011 RW xx001100– xx001111 xx010000 xx010010 xx010011 xx010100 xx010101 xx010110 xx011110 xx011111 x001100– x001111 x010000 x010010 x010011 x010100 x010101 x010110 x011110 x011111 xx101100– xx101111 xx110000 xx110010 xx110011 xx110100 Not used xx110110 Not used xx111111 x101100– x101111 x110000 x110010 x110011 x110100 Not used x110110 Not used x111111 Receive Signal Level Indicator 1–4 RSL1–4 0C–0F Bit Error Rate Tester Control Line Violation Detect Status Receive Clock Invert Transmit Clock Invert Clock Control Register RCLK Disable Upon LOS Global Interrupt Status Control Address Pointer for Bank Selection BTCR LVDS RCLKI TCLKI CCR RDULR GISC ADDP 10 12 13 14 15 16 1E 1F 42 of 121 HEX FOR CH 9–16 2C–2F 30 32 33 34 35 36 3E 3F RW R RW R RW RW RW RW RW RW DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-4. BERT Register Set REGISTER BERT Control Reserved BERT Pattern Configuration 1 BERT Pattern Configuration 2 BERT Seed/Pattern 1 BERT Seed/Pattern 2 BERT Seed/Pattern 3 BERT Seed/Pattern 4 Transmit Error Insertion Control Reserved BERT Status Reserved BERT Status Register Latched BERT Status Register Interrupt Enable Reserved Receive Bit Error Count Register 1 Receive Bit Error Count Register 2 Receive Bit Error Count Register 3 Receive Bit Count Register 1 Receive Bit Count Register 2 Receive Bit Count Register 3 Receive Bit Count Register 4 Reserved Address Pointer for Bank Selection NAME HEX FOR CH 1–8 BCR — BPCR1 BPCR2 BSPR1 BSPR2 BSPR3 BSPR4 TEICR 00 01 02 03 04 05 06 07 08 — 09–0A BSR — BSRL BSRIE 0C 0D 0E 10 — 11–13 RBECR1 RBECR2 RBECR3 RBCR1 RBCR2 RBCR3 RBCR4 14 15 16 18 19 1A 1B — 1C–1E ADDP 1F ADDRESS FOR CHANNELS 1–8 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) xx000000 xx000001 xx000010 xx000011 xx000100 xx000101 xx000110 xx000111 xx001000 xx001001– x001010 xx001100 xx001101 xx010011 xx010000 xx010001– xx010011 xx010100 xx010101 xx010110 xx011000 xx011001 xx011010 xx011011 xx011100– xx011110 xx011111 43 of 121 HEX FOR CH 9–16 x000000 x000001 x000010 x000011 x000100 x000101 x000110 x000111 x001000 20 21 22 23 24 25 26 27 28 — 29–2A x001100 x001101 x010011 x010000 X010001– x010011 x010100 x010101 x010110 x011000 x011001 x011010 x011011 x011100– x011110 x011111 2C 2D 2E 30 31–33 34 35 36 38 39 3A 3B 3C–3E 3F ADDRESS FOR CHANNELS 9–16 PARALLEL SERIAL INTERFACE INTERFACE A[7:0] (HEX) A[7:1] (HEX) xx100000 xx100001 xx100010 xx100011 xx100100 xx100101 xx100110 xx100111 xx101000 xx101001– x101010 xx101100 xx101101 xx110011 xx110000 xx110001– xx110011 xx110100 xx110101 xx110110 xx111000 xx111001 xx111010 xx111011 xx111100– xx111110 xx111111 RW x100000 x100001 x100010 x100011 x100100 x100101 x100110 x100111 x101000 RW — RW RW RW RW RW RW RW — — x101100 x101101 x110011 x110000 x110001– x110011 x110100 x110101 x110110 x111000 x111001 x111010 x111011 x111100– x111110 x111111 R — RW RW — R R R R R R R — RW DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-5. Primary Register Set Bit Map REGISTER ADDRESS FOR LIUs 1–8 R/W BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 ID ALBC RLBC TAOE LOSS DFMS LOSIE DFMIE LOSIS DFMIS SWR BGMC DLBC LASCS ATAOS GC TST TS OE AIS AISIE AISI Not Used ADDP 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16-1E 1F R RW RW RW RW RW RW RW R R W RW RW RW RW RW RW RW RW R RW R — RW ID7 ALBC8 RLBC8 TAOE8 LOSS8 DFMS8 LOSIE8 DFMIE8 LOSIS8 DFMIS8 SWRL BERTDIR DLBC8 LASCS8 ATAOS8 RIMPMS JABWS1 RIMPON OE8 AIS8 AISIE8 AISI8 — ADDP7 ID6 ALBC7 RLBC7 TAOE7 LOSS7 DFMS7 LOSIE7 DFMIE7 LOSIS7 DFMIS7 SWRL BMCKS DLBC7 LASCS7 ATAOS7 AISEL JABWS0 TIMPOFF OE7 AIS7 AISIE7 AISI7 — ADDP6 ID5 ALBC6 RLBC6 TAOE6 LOSS6 DFMS6 LOSIE6 DFMIE6 LOSIS6 DFMIS6 SWRL BTCKS DLBC6 LASCS6 ATAOS6 SCPD RHPMC — OE6 AIS6 AISIE6 AISI6 — ADDP5 ID4 ALBC5 RLBC5 TAOE5 LOSS5 DFMS5 LOSIE5 DFMIE5 LOSIS5 DFMIS5 SWRL — DLBC5 LASCS5 ATAOS5 CODE — — OE5 AIS5 AISIE5 AISI5 — ADDP4 ID3 ALBC4 RLBC4 TAOE4 LOSS4 DFMS4 LOSIE4 DFMIE4 LOSIS4 DFMIS4 SWRL GMC4 DLBC4 LASCS4 ATAOS4 JADS — TIMPRM OE4 AIS4 AISIE4 AISI4 — ADDP3 ID2 ALBC3 RLBC3 TAOE3 LOSS3 DFMS3 LOSIE3 DFMIE3 LOSIS3 DFMIS3 SWRL GMC3 DLBC3 LASCS3 ATAOS3 CRIMP TST2 TS2 OE3 AIS3 AISIE3 AISI3 — ADDP2 ID1 ALBC2 RLBC2 TAOE2 LOSS2 DFMS2 LOSIE2 DFMIE2 LOSIS2 DFMIS2 SWRL GMC2 DLBC2 LASCS2 ATAOS2 JAPS TST1 TS1 OE2 AIS2 AISIE2 AISI2 — ADDP1 ID0 ALBC1 RLBC1 TAOE1 LOSS1 DFMS1 LOSIE1 DFMIE1 LOSIS1 DFMIS1 SWRL GMC1 DLBC1 LASCS1 ATAOS1 JAE TST0 TS0 OE1 AIS1 AISIE1 AISI1 — ADDP0 REGISTER ADDRESS FOR LIUs 9–16 R/W BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 Not Used ALBC RLBC TAOE LOSS DFMS LOSIE DFMIE LOSIS DFMIS SWR BGMC DLBC LASCS ATAOS GC TST TS OE AIS AISIE AISI Not Used ADDP 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36-3E 3F R RW RW RW RW RW RW RW R R W RW RW RW RW RW RW RW RW R RW R — RW — ALBC16 RLBC16 TAOE16 LOSS16 DFMS16 LOSIE16 DFMIE16 LOSIS16 DFMIS16 SWRU BERTDIR DLBC16 LASCS16 — ALBC15 RLBC15 TAOE15 LOSS15 DFMS15 LOSIE15 DFMIE15 LOSIS15 DFMIS15 SWRU BMCKS DLBC15 LASCS15 — ALBC14 RLBC14 TAOE14 LOSS14 DFMS14 LOSIE14 DFMIE14 LOSIS14 DFMIS14 SWRU BTCKS DLBC14 LASCS14 — ALBC13 RLBC13 TAOE13 LOSS13 DFMS13 LOSIE13 DFMIE13 LOSIS13 DFMIS13 SWRU — DLBC13 LASCS13 — ALBC12 RLBC12 TAOE12 LOSS12 DFMS12 LOSIE12 DFMIE12 LOSIS12 DFMIS12 SWRU GMC4 DLBC12 LASCS12 — ALBC11 RLBC11 TAOE11 LOSS11 DFMS11 LOSIE11 DFMIE11 LOSIS11 DFMIS11 SWRU GMC3 DLBC11 LASCS11 — ALBC10 RLBC10 TAOE10 LOSS10 DFMS10 LOSIE10 DFMIE10 LOSIS10 DFMIS10 SWRU GMC2 DLBC10 LASCS10 — ALBC9 RLBC9 TAOE9 LOSS9 DFMS9 LOSIE9 DFMIE9 LOSIS9 DFMIS9 SWRU GMC1 DLBC9 LASCS9 ATAOS16 ATAOS15 ATAOS14 ATAOS13 ATAOS12 ATAOS11 ATAOS10 ATAOS9 RIMPMS — RIMPON OE16 AIS16 AISIE16 AISI16 — ADDP7 AISEL — TIMPOFF OE15 AIS15 AISIE15 AISI15 — ADDP6 SCPD — — OE14 AIS14 AISIE14 AISI14 — ADDP5 CODE — — OE13 AIS13 AISIE13 AISI13 — ADDP4 JADS — TIMPRM OE12 AIS12 AISIE12 AISI12 — ADDP3 CALEN TST2 TS2 OE11 AIS11 AISIE11 AISI11 — ADDP2 JAPS TST1 TS1 OE10 AIS10 AISIE10 AISI10 — ADDP1 JAE TST0 TS0 OE9 AIS9 AISIE9 AISI9 — ADDP0 Note: Underlined bits are read only. 44 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-6. Secondary Register Set Bit Map REGISTER ADDRESS FOR LIUs 1–8 RW BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 SRMS LCS Not Used RPDE TPDE EZDE CVDEB Not Used ADDP 00 01 02 03 04 05 06 07–1E 1F RW RW RW RW RW RW RW — RW SRMS8 LCS8 — RPDE8 TPDE8 EZDE8 CVDEB8 — ADDP7 SRMS7 LCS7 — RPDE7 TDPE7 EZDE7 CVDEB7 — ADDP6 SRMS6 LCS6 — RPDE6 TPDE6 EZDE6 CVDEB6 — ADDP5 SRMS5 LCS5 — RPDE5 TPDE5 EZDE5 CVDEB5 — ADDP4 SRMS4 LSC4 — RPDE4 TPDE4 EZDE4 CVDEB4 — ADDP3 SRMS3 LCS3 — RPDE3 TPDE3 EZDE3 CVDEB3 — ADDP2 SRMS2 LSC2 — RPDE2 TPDE2 EZDE2 CVDEB2 — ADDP1 SRMS1 LSC1 — RPDE1 TPDE1 EZDE1 CVDEB1 — ADDP0 REGISTER ADDRESS FOR LIUs 9–16 RW BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 SRMS LCS Not Used RPDE TPDE EZDE CVDEB Not Used ADDP 20 21 22 23 24 25 26 27–3E 3F RW RW RW RW RW RW RW — RW SRMS16 LCS16 — RPDE16 TPDE16 EZDE16 SRMS15 LCS15 — RPDE15 TDPE15 EZDE15 SRMS14 LCS14 — RPDE14 TPDE14 EZDE14 SRMS13 LCS13 — RPDE13 TPDE13 EZDE13 SRMS12 LSC12 — RPDE12 TPDE12 EZDE12 SRMS11 LCS11 — RPDE11 TPDE11 EZDE11 SRMS10 LSC10 — RPDE10 TPDE10 EZDE10 SRMS9 LSC9 — RPDE9 TPDE9 EZDE9 CVDEB16 CVDEB15 CVDEB14 CVDEB13 CVDEB12 CVDEB11 CVDEB10 CVDEB9 — ADDP7 — ADDP6 — ADDP5 — ADDP4 — ADDP3 — ADDP2 — ADDP1 — ADDP0 45 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-7. Individual LIU Register Set Bit Map REGISTER ADDRESS FOR LIUs 1–8 RW BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 IJAE IJAPS IJAFDS IJAFLT ISCPD IAISEL MC SHLHS RSMM1 RSMM2 RSMM3 RSMM4 RSL1 RSL2 RSL3 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E RW RW RW R RW RW RW RW RW RW RW RW R R R IJAE8 IJAPS8 IJAFDS8 IJAFLT8 ISCPD8 IAISEL8 PCLKI1 SHLHS8 RTR2 RTR4 RTR6 RTR8 C2RSL3 C4RSL3 C6RSL3 IJAE7 IJAPS7 IJAFDS7 IJAFLT7 ISCPD7 IAISEL7 PCLKI0 SHLHS7 C2RSM2 C4RSM2 C6RSM2 C8RSM2 C2RSL2 C4RSL2 C6RSL2 IJAE6 IJAPS6 IJAFDS6 IJAFLT6 ISCPD6 IAISEL6 TECLKE SHLHS6 C2RSM1 C4RSM1 C6RSM1 C8RSM1 C2RSL1 C4RSL1 C6RSL1 IJAE4 IJAPS4 IJAFDS4 IJAFLT4 ISCPD4 IAISEL4 MPS1 SHLHS4 RTR1 RTR3 RTR5 RTR7 C1RSL3 C3RSL3 C5RSL3 IJAE3 IJAPS3 IJAFDS3 IJAFLT3 ISCPD3 IAISEL3 MPS0 SHLHS3 C1RSM2 C3RSM2 C5RSM2 C7RSM2 C1RSL2 C3RSL2 C5RSL2 IJAE2 IJAPS2 IJAFDS2 IJAFLT2 ISCPD2 IAISEL2 FREQS SHLHS2 C1RSM1 C3RSM1 C5RSM1 C7RSM1 C1RSL1 C3RSL1 C5RSL1 IJAE1 IJAPS1 IJAFDS1 IJAFLT1 ISCPD1 IAISEL1 PLLE SHLHS1 C1RSM0 C3RSM0 C5RSM0 C7RSM0 C1RSL0 C3RSL0 C5RSL0 RSL4 0F R C8RSL3 C8RSL2 C8RSL1 C7RSL3 C7RSL2 C7RSL1 C7RSL0 BTCR BEIR LVDS RCLKI TCLKI CCR RDULR GISC ADDP 10 11 12 13 14 15 16 1E 1F RW RW R RW RW RW RW RW RW BTS2 BEIR8 LVDS8 RCLKI8 TCLKI8 PCLKS2 RDULR8 — ADDP7 BTS1 BEIR7 LVDS7 RCLKI7 TCLKI7 PCLKS1 RDULR7 — ADDP6 BTS0 BEIR6 LVDS6 RCLKI6 TCLKI6 PCLKS0 RDULR6 — ADDP5 IJAE5 IJAPS5 IJAFDS5 IJAFLT5 ISCPD5 IAISEL5 CLKAE SHLHS5 C2RSM0 C4RSM0 C6RSM0 C8RSM0 C2RSL0 C4RSL0 C6RSL0 C8RSL0/ CALSTAT — BEIR5 LVDS5 RCLKI5 TCLKI5 TECLKS RDULR5 — ADDP4 — BEIR4 LVDS4 RCLKI4 TCLKI4 CLKA3 RDULR4 — ADDP3 — BEIR3 LVDS3 RCLKI3 TCLKI3 CLKA2 RDULR3 — ADDP2 — BEIR2 LVDS2 RCLKI2 TCLKI2 CLKA1 RDULR2 INTM ADDP1 BERTE BEIR1 LVDS1 RCLKI1 TCLKI1 CLKA0 RDULR1 CWE ADDP0 REGISTER ADDRESS FOR LIUs 9–16 RW BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 IJAE IJAPS IJAFDS IJAFLT ISCPD IAISEL Not Used SHLHS RSMM1 RSMM2 RSMM3 RSMM4 RSL1 RSL2 RSL3 RSL4 BTCR BEIR LVDS RCLKI TCLKI Not Used RDULR Not Used ADDP 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 3E 3F RW RW RW R RW RW RW RW RW RW RW RW R R R R RW RW R RW RW RW RW RW RW IJAE16 IJAPS16 IJAFDS16 IJAFLT16 ISCPD16 IAISEL16 — SHLHS16 RTR10 RTR12 RTR14 RTR16 C10RSL3 C12RSL3 C14RSL3 C16RSL3 BTS2 BEIR16 LVDS16 RCLKI16 TCLKI16 — RDULR16 — ADDP7 IJAE15 IJAPS15 IJAFDS15 IJAFLT15 ISCPD15 IAISEL15 — SHLHS15 C10RSM2 C12RSM2 C14RSM2 C16RSM2 C10RSL2 C12RSL2 C14RSL2 C16RSL2 BTS1 BEIR15 LVDS15 RCLKI15 TCLKI15 — RDULR15 — ADDP6 IJAE14 IJAPS14 IJAFDS14 IJAFLT14 ISCPD14 IAISEL14 — SHLHS14 C10RSM1 C12RSM1 C14RSM1 C16RSM1 C10RSL1 C12RSL1 C14RSL1 C16RSL1 BTS0 BEIR14 LVDS14 RCLKI14 TCLKI14 — RDULR14 — ADDP5 IJAE13 IJAPS13 IJAFDS13 IJAFLT13 ISCPD13 IAISEL13 — SHLHS13 C10RSM0 C12RSM0 C14RSM0 C16RSM0 C10RSL0 C12RSL0 C14RSL0 C16RSL0 — BEIR13 LVDS13 RCLKI13 TCLKI13 — RDULR13 — ADDP4 IJAE12 IJAPS12 IJAFDS12 IJAFLT12 ISCPD12 IAISEL12 — SHLHS12 RTR9 RTR11 RTR13 RTR15 C9RSL3 C11RSL3 C13RSL3 C15RSL3 — BEIR12 LVDS12 RCLKI12 TCLKI12 — RDULR12 — ADDP3 IJAE11 IJAPS11 IJAFDS11 IJAFLT11 ISCPD11 IAISEL11 — SHLHS11 C9RSM2 C11RSM2 C13RSM2 C15RSM2 C9RSL2 C11RSL2 C13RSL2 C15RSL2 — BEIR11 LVDS11 RCLKI11 TCLKI11 — RDULR11 — ADDP2 IJAE10 IJAPS10 IJAFDS10 IJAFLT10 ISCPD10 IAISEL10 — SHLHS10 C9RSM1 C11RSM1 C13RSM1 C15RSM1 C9RSL1 C11RSL1 C13RSL1 C15RSL1 — BEIR10 LVDS10 RCLKI10 TCLKI10 — RDULR10 INTM ADDP1 IJAE9 IJAPS9 IJAFDS9 IJAFLT9 ISCPD9 IAISEL9 — SHLHS9 C9RSM0 C11RSM0 C13RSM0 C15RSM0 C9RSL0 C11RSL0 C13RSL0 C15RSL0 BERTE BEIR9 LVDS9 RCLKI9 TCLKI9 — RDULR9 CWE ADDP0 Note: Underlined bits are read only. 46 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-8. BERT Register Bit Map ADDRESS FOR LIUs REGISTER 1–8 9–16 RW BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 TPIC BCR 00 20 RW PMUM LPMU RNPL RPIC MPR APRD TNPL Not Used 01 21 — — — — — — — — — BPCR1 02 22 RW — QRSS PTS PLF4 PLF3 PLF2 PLF1 PLF0 BPCR2 03 23 — — — — PTF4 PTF3 PTF2 PTF1 PTF0 BSPR1 04 24 RW BSP7 BSP6 BSP5 BSP4 BSP3 BSP2 BSP1 BSP0 BSPR2 05 25 — BSP15 BSP14 BSP13 BSP12 BSP11 BSP10 BSP9 BSP8 BSPR3 06 26 RW BSP23 BSP22 BSP21 BSP20 BSP19 BSP18 BSP17 BSP16 BSPR4 07 27 — BSP31 BSP30 BSP29 BSP28 BSP27 BSP26 BSP25 BSP24 MEIMS TEICR 08 28 RW — — TEIR2 TEIR1 TEIR0 BEI TSEI Not Used 09–0B 29–2B — — — — — — — — — BSR 0C 2C R — — — — PMS — BEC OOS Not Used 0D 2D — — — — — — — — — BSRL 0E 2E R — — — — PMSL BEL BECL OOSL Not Used 0F 2F — — — — — — — — — BSRIE 10 30 RW — — — — PMSIE BEIE BECIE OOSIE Not Used 11–13 31–33 — — — — — — — — — RBECR1 14 34 R BEC7 BEC6 BEC5 BEC4 BEC3 BEC2 BEC1 BEC0 RBECR2 15 35 R BEC15 BEC14 BEC13 BEC12 BEC11 BEC10 BEC9 BEC8 RBECR3 16 36 R BEC23 BEC22 BEC21 BEC20 BEC19 BEC18 BEC17 BEC16 Not Used 17 37 — — — — — — — — — RBCR1 18 38 R BC7 BC6 BC5 BC4 BC3 BC2 BC1 BC0 RBCR2 19 39 R BC15 BC14 BC13 BC12 BC11 BC10 BC9 BC8 RBCR3 RBCR4 1A 3A R BC23 BC22 BC21 BC20 BC19 BC18 BC17 BC16 1B 3B R BC31 BC30 BC29 BC28 BC27 BC26 BC25 BC24 Not Used 1C–1E 3C–3E — — — — — — — — — ADDP 1F 3F RW ADDP7 ADDP6 ADDP5 ADDP4 ADDP3 ADDP2 ADDP1 ADDP0 Note: Underlined bits are read only. 47 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 6.1 Register Description This section contains the detailed register descriptions of each bit. Whenever the variable “n” in italics is used in any of the register descriptions, it represents 1–16. Note that in the register descriptions, there are duplicate registers for LIUs 1–8 and LIUs 9–16. There are registers in LIUs 1–8 that do not have a duplicate in the register set for LIUs 9–16. For these registers, only one address is listed. All other registers list two addresses, one for LIUs 1–8 and one for LIUs 9–16. 6.1.1 Primary Register Bank The ADDP register must be set to 00h to access this bank. ID Identification Register 00h Register Name: Register Description: Register Address: Bit # Name 7 ID7 6 ID6 5 ID5 4 ID4 3 ID3 2 ID2 1 ID1 0 ID0 Bit 7: Device CODE ID Bit 7 (ID7). This bit is “one” for long-haul operation. Bits 6 to 3: Device CODE ID Bits 6 to 3 (ID[6:3]). These bits tell the user the number of ports the device contains. Bits 2 to 0: Device CODE ID Bits 2 to 0 (ID[2:0]). These bits tell the user the revision of the part. Contact the factory for details. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 ALBC8 0 6 ALBC7 0 Register Address (LIUs 9–16): Bit # Name Default 7 ALBC16 0 ALBC Analog Loopback Control Register 01h 5 ALBC6 0 4 ALBC5 0 3 ALBC4 0 2 ALBC3 0 1 ALBC2 0 0 ALBC1 0 5 ALBC14 0 4 ALBC13 0 3 ALBC12 0 2 ALBC11 0 1 ALBC10 0 0 ALBC9 0 21h 6 ALBC15 0 Bits 7 to 0: Analog Loopback Control Bits Channel n (ALBCn). When this bit is set, LIUn is placed in analog loopback. TTIP and TRING are looped back to RTIP and RRING. The data at RTIP and RRING is ignored. The LOS detector is still in operation. The jitter attenuator is in use if enabled for the transmitter or receiver. 48 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RLBC8 0 6 RLBC7 0 Register Address (LIUs 9–16): Bit # Name Default 7 RLBC16 0 RLBC Remote Loopback Control Register 02h 5 RLBC6 0 4 RLBC5 0 3 RLBC4 0 2 RLBC3 0 1 RLBC2 0 0 RLBC1 0 5 RLBC14 0 4 RLBC13 0 3 RLBC12 0 2 RLBC11 0 1 RLBC10 0 0 RLBC9 0 22h 6 RLBC15 0 Bits 7 to 0: Remote Loopback Control Bits Channel n (RLBCn). When this bit is set, remote loopback is enabled on LIUn. The analog received signal goes through the receive digital and is looped back to the transmitter. The data at TPOS and TNEG is ignored. The jitter attenuator is in use if enabled. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 TAOE8 0 6 TAOE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 TAOE16 0 TAOE Transmit All Ones Enable Register 03h 5 TAOE6 0 4 TAOE5 0 3 TAOE4 0 2 TAOE3 0 1 TAOE2 0 0 TAOE1 0 5 TAOE14 0 4 TAOE13 0 3 TAOE12 0 2 TAOE11 0 1 TAOE10 0 0 TAOE9 0 23h 6 TAOE15 0 Bits 7 to 0: Transmit All Ones Enable Channel n (TAOEn). When this bit is set, continuous stream of all ones on TTIP and TRING are sent on Channel n. MCLK is used as a reference clock for Transmit All Ones Signal. The data arriving at TPOS and TNEG is ignored. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 LOSS8 0 6 LOSS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 LOSS16 0 LOSS Loss of Signal Status Register 04h 5 LOSS6 0 4 LOSS5 0 3 LOSS4 0 2 LOSS3 0 1 LOSS2 0 0 LOSS1 0 5 LOSS14 0 4 LOSS13 0 3 LOSS12 0 2 LOSS11 0 1 LOSS10 0 0 LOSS9 0 24h 6 LOSS15 0 Bits 7 to 0: Loss of Signal Status Channel n (LOSSn). When this bit is set, an LOS condition has been detected on LIUn. The criteria and conditions of LOS are described in Section 5.5.6. 49 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 DFMS8 0 6 DFMS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 DFMS16 0 DFMS Driver Fault Monitor Status Register 05h 5 DFMS6 0 4 DFMS5 0 3 DFMS4 0 2 DFMS3 0 1 DFMS2 0 0 DFMS1 0 5 DFMS14 0 4 DFMS13 0 3 DFMS12 0 2 DFMS11 0 1 DFMS10 0 0 DFMS9 0 25h 6 DFMS15 0 Bits 7 to 0: Driver Fault Monitor Status Channel n (DFMSn). When this bit is set, it indicates that there is a short or open circuit at the transmit driver for LIUn. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 LOSIE8 0 6 LOSIE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 LOSIE16 0 LOSIE Loss of Signal Interrupt Enable Register 06h 5 LOSIE6 0 4 LOSIE5 0 3 LOSIE4 0 2 LOSIE3 0 1 LOSIE2 0 0 LOSIE1 0 5 LOSIE14 0 4 LOSIE13 0 3 LOSIE12 0 2 LOSIE11 0 1 LOSIE10 0 0 LOSIE9 0 26h 6 LOSIE15 0 Bits 7 to 0: Loss of Signal Interrupt Enable Channel n (LOSIEn). When this bit is set, a change in LOS status for LIUn can generate an interrupt. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 DFMIE8 0 6 DFMIE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 DFMIE16 0 DFMIE Driver Fault Monitor Interrupt Enable Register 07h 5 DFMIE6 0 4 DFMIE5 0 3 DFMIE4 0 2 DFMIE3 0 1 DFMIE2 0 0 DFMIE1 0 5 DFMIE14 0 4 DFMIE13 0 3 DFMIE12 0 2 DFMIE11 0 1 DFMIE10 0 0 DFMIE9 0 27h 6 DFMIE15 0 Bits 7 to 0: Driver Fault Monitor Interrupt Enable Channel n (DFMIEn). When this bit is set, a change in DFM status can generate an interrupt. 50 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 LOSIS8 0 6 LOSIS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 LOSIS16 0 LOSIS Loss of Signal Interrupt Status Register 08h 5 LOSIS6 0 4 LOSIS5 0 3 LOSIS4 0 2 LOSIS3 0 1 LOSIS2 0 0 LOSIS1 0 5 LOSIS14 0 4 LOSIS13 0 3 LOSIS12 0 2 LOSIS11 0 1 LOSIS10 0 0 LOSIS9 0 28h 6 LOSIS15 0 Bits 7 to 0: Loss of Signal Interrupt Status Channel n (LOSISn). When this bit is set, it indicates a LOS status has transition from a “0 to 1” or “1 to 0” and was detected for LIUn. The bit for LIUn is enabled by register LOSIE (06h). This bit when latched is cleared on a read operation. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 DFMIS8 0 6 DFMIS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 DFMIS16 0 DFMIS Driver Fault Monitor Interrupt Status Register 09h 5 DFMIS6 0 4 DFMIS5 0 3 DFMIS4 0 2 DFMIS3 0 1 DFMIS2 0 0 DFMIS1 0 5 DFMIS14 0 4 DFMIS13 0 3 DFMIS12 0 2 DFMIS11 0 1 DFMIS10 0 0 DFMIS9 0 29h 6 DFMIS15 0 Bits 7 to 0: Driver Fault Status Register Channel n (DFMISn). When this bit is set, it indicates a DFM status has transitioned from “0 to 1” or “1 to 0” and was detected for LIUn. The bit for LIUn is enabled by register DFMIE (07h). This bit when latched is cleared on a read operation. 51 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 SWRL 0 SWR Software Reset Register 0Ah 6 SWRL 0 5 SWRL 0 4 SWRL 0 3 SWRL 0 2 SWRL 0 1 SWRL 0 0 SWRL 0 Bits 7 to 0: Software Reset (SWRL). Whenever any write is performed to this register, at least 1µs reset will be generated that resets the lower set of registers (LIUs 1–8). All the registers will be restored to their default values. A read operation will always read back all zeros. Register Address (LIUs 9–16): Bit # Name Default 7 SWRU 0 6 SWRU 0 2Ah 5 SWRU 0 4 SWRU 0 3 SWRU 0 2 SWRU 0 1 SWRU 0 0 SWRU 0 Bits 7 to 0: Software Reset (SWRU). Whenever any write is performed to this register, at least 1µs reset will be generated that resets the upper set of registers (LIUs 9–16). All the registers will be restored to their default values. A read operation will always read back all zeros. 52 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 BERTDIR 0 BGMC BERT and G.772 Monitoring Control Register 0Bh 6 BMCKS 0 5 BTCKS 0 4 — 0 3 GMC3 0 2 GMC2 0 1 GMC1 0 0 GMC0 0 Bit 7: BERT Direction Control Bit (BERTDIR). When this bit is set, the BERT for LIUs 1–8 will be enabled on the system side of the part (BERT data will come out on RPOS/RNEG and be expected on TPOS/TNEG) for whichever LIU the BERT is enabled. Bit 6: BERT MCLK Selection (BMCKS). When the BERT is enabled on the system side (BERTDIR = 1), setting this bit will select MCLK as the BERT clock unless BTCKS is set. If neither BMCKS nor BTCKS is set, the BERT will use the recovered clock. Bit 5: BERT TCLK Selection (BTCKS). When the BERT is enabled on the system side (BERTDIR = 1), setting this bit selects TCLK as the BERT clock, regardless of the state of the BMCKS bit. If neither BMCKS nor BTCKS is set, the BERT will use the recovered clock. Bits 3 to 0: G.772 Monitoring Control (GMC[3:0]). These bits are used to select transmitter or receiver for nonintrusive monitoring. Receiver 1 is used to monitor Channels 2 to 8 of one receiver from RTIP2– RTIP8/RRING2–RRING8 or of one transmitter from TTIP2–TTIP8/TRING2–TRING8. See Table 6-9. Register Address (LIUs 9–16): Bit # Name Default 7 BERTDIR 0 6 BMCKS 0 2Bh 5 BTCKS 0 4 — 0 3 GMC3 0 2 GMC2 0 1 GMC1 0 0 GMC0 0 Bit 7: BERT Direction Control Bit (BERTDIR). When this bit is set, the BERT for LIUs 9–16 will be enabled on the system side of the part (BERT data will come out on RPOS/RNEG and be expected on TPOS/TNEG) for whichever LIU the BERT is enabled. Bit 6: BERT MCLK Selection (BMCKS). When the BERT is enabled on the system side (BERTDIR = 1), setting this bit will select MCLK as the BERT clock unless BTCKS is set. If neither BMCKS nor BTCKS is set, the BERT will use the recovered clock. If the clock used as the BERT clock is MCLK or the recovered clock, TCLK must be frequency locked to the BERT clock in order for the BERT to sync. Bit 5: BERT TCLK Selection (BTCKS). When the BERT is enabled on the system side (BERTDIR = 1), setting this bit selects TCLK as the BERT clock, regardless of the state of the BMCKS bit. If neither BMCKS nor BTCKS is set, the BERT will use the recovered clock. Bits 3 to 0: G.772 Monitoring Control (GMC). These bits are used to select transmitter or receiver for nonintrusive monitoring. Receiver 9 is used to monitor Channels 10 to 16 of one receiver from RTIP10– RTIP16/RRING10–RRING16 or of one transmitter from TTIP10–TTIP16/TRING10–TRING16. See Table 6-10. 53 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-9. G.772 Monitoring Control (LIU 1) GMC3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 GMC2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 GMC1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 GMC0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 SELECTION No Monitoring Receiver 2 Receiver 3 Receiver 4 Receiver 5 Receiver 6 Receiver 7 Receiver 8 No Monitoring Transmitter 2 Transmitter 3 Transmitter 4 Transmitter 5 Transmitter 6 Transmitter 7 Transmitter 8 Table 6-10. G.772 Monitoring Control (LIU 9) GMC3 GMC2 GMC1 GMC0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 SELECTION No Monitoring Receiver 10 Receiver 11 Receiver 12 Receiver 13 Receiver 14 Receiver 15 Receiver 16 No Monitoring Transmitter 10 Transmitter 11 Transmitter 12 Transmitter 13 Transmitter 14 Transmitter 15 Transmitter 16 54 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 DLBC8 0 6 DLBC7 0 Register Address (LIUs 9–16): Bit # Name Default 7 DLBC16 0 DLBC Digital Loopback Control Register 0Ch 5 DLBC6 0 4 DLBC5 0 3 DLBC4 0 2 DLBC3 0 1 DLBC2 0 0 DLBC1 0 5 DLBC14 0 4 DLBC13 0 3 DLBC12 0 2 DLBC11 0 1 DLBC10 0 0 DLBC9 0 2Ch 6 DLBC15 0 Bits 7 to 0: Digital Loopback Control Channel n (DLBCn). When this bit is set the LIUn is placed in digital loopback. The data at TPOS/TNEG is encoded and looped back to the decoder and output on RPOS/RNEG. The Jitter Attenuator can optionally be included in the transmit or receive paths. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 LASCS8 0 6 LASCS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 LASCS16 0 LASCS LOS/AIS Criteria Selection Register 0Dh 5 LASCS6 0 4 LASCS5 0 3 LASCS4 0 2 LASCS3 0 1 LASCS2 0 0 LASCS1 0 5 LASCS14 0 4 LASCS13 0 3 LASCS12 0 2 LASCS11 0 1 LASCS10 0 0 LASCS9 0 2Dh 6 LASCS15 0 Bits 7 to 0: LOS/AIS Criteria Selection Channel n (LASCSn). This bit is used for LOS/AIS selection criteria for LIUn. In E1 mode, if set it uses ETS 300 233 mode selections. If reset it uses G.775 criteria. In T1/J1 mode T1.231 criteria is selected. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 ATAOS8 0 6 ATAOS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 ATAOS16 0 ATAOS Automatic Transmit All Ones Select Register 0Eh 5 ATAOS6 0 4 ATAOS5 0 3 ATAOS4 0 2 ATAOS3 0 1 ATAOS2 0 0 ATAOS1 0 5 ATAOS14 0 4 ATAOS13 0 3 ATAOS12 0 2 ATAOS11 0 1 ATAOS10 0 0 ATAOS9 0 2Eh 6 ATAOS15 0 Bits 7 to 0: Automatic Transmit All Ones Select Channel n (ATAOSn). When this bit is set all ones signal is sent if an LOS is detected for LIUn. “All Ones Signal” uses MCLK as the reference clock. 55 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RIMPMS 0 6 AISEL 0 GC Global Configuration Register 0Fh 5 SCPD 0 4 CODE 0 3 JADS 0 2 CRIMP 0 1 JAPS 0 0 JAE 0 Note: CRIMP controls all 16 LIUs. All other bits are for LIUs 1–8 only. Bit 7: Receive Impedance Mode Select (RIMPMS). When this bit is set, fully internal impedance match mode is selected, so RTIP and RRING require no external resistor. If this bit is set, the receiver line transformer must be a 1:1 turns ratio and the RTR bit set. When reset, external termination mode is selected and an external resistor is required to terminate the receive line. This external resistor will be adjusted internally to the correct termination value if partially internal impedance matching is turned on (TS.RIMPON = 1). Bit 6: AIS Enable During Loss (AISEL). When this bit is set, an AIS is sent to the system side upon detecting LOS for each channel. The individual LIU register IAISEL settings will be ignored when this bit is set. When reset, the IAISEL register will have control. Bit 5: Short Circuit Protection Disable (SCPD). If this bit is set the short-circuit protection is disabled for all the transmitters. The individual LIU register ISCPD settings will be ignored when this bit is set. When reset, the ISCPD register will have control. Bit 4: Code (CODE). If this bit is set AMI encoder/decoder is selected. The LCS register settings will be ignored when this bit is set. If reset, the LCS register will have control. Bit 3: Jitter Attenuator Depth Select (JADS). If this bit is set the jitter attenuator FIFO depth is 128 bits. The settings in the IJAFDS register will be ignored if this register is set. If reset the IJAFDS register will have control. Bit 2: Calibrate Receive Internal Termination (CRIMP). A low-to-high transition on this bit initiates a calibration cycle for the receive internal termination. This requires a 16kΩ ±1% resistor on the RESREF pin. Bit 2 of the GC register at address 0x2F must also be set to enable calibration. While this bit is set, RSL4.4 (0x0F in individual bank) will indicate the status of the calibration cycle. Bit 1: Jitter Attenuator Position Select (JAPS). When the JAPS bit is set high, the jitter attenuator will be in the receive path and when default or set low in the Transmit path. These settings can be changed for an individual LIU by settings in the IJAPS register. Note that when bit JAE is set, the settings in the IJAPS register will be ignored. Bit 0: Jitter Attenuator Enable (JAE). When this bit is set the jitter attenuator is enabled. The settings in the IJAE register will be ignored if this register is set. If reset, the IJAE register will have control. 56 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Address (LIUs 9–16): Bit # Name Default 7 RIMPMS 0 6 AISEL 0 2Fh 5 SCPD 0 4 CODE 0 3 JADS 0 2 CALEN 0 1 JAPS 0 0 JAE 0 Note: CALEN controls all 16 LIUs. All other bits are for LIUs 9–16 only. Bit 7: Receive Impedance Mode Select (RIMPMS). When this bit is set, the fully internal receive impedance matching mode is selected, so RTIP and RRING require no external resistor. If this bit is set, the receiver line transformer must be a 1:1 turns ratio and the RTR bit set. When reset and TS.RIMPON = 1, partially internal receive impedance matching mode is selected and an external resistor is required to terminate the receive line. This external resistor will be adjusted internally to the correct termination value. Bit 6: AIS Enable During Loss (AISEL). When this bit is set, an AIS is sent to the system side upon detecting LOS for each channel. The individual LIU register IAISEL settings will be ignored when this bit is set. When reset, the IAISEL register will have control. Bit 5: Short Circuit Protection Disable (SCPD). If this bit is set the short-circuit protection is disabled for all the transmitters. The individual LIU register ISCPD settings will be ignored when this bit is set. When reset, the ISCPD register will have control. Bit 4: Code (CODE). If this bit is set AMI encoder/decoder is selected. The LCS register settings will be ignored when this bit is set. If reset, the LCS register will have control. Bit 3: Jitter Attenuator Depth Select (JADS). If this bit is set the jitter attenuator FIFO depth is 128 bits. The settings in the IJAFDS register will be ignored if this register is set. If reset the IJAFDS register will have control. Bit 2: Calibrate Receive Impedance Match (CALEN). This bit must be set to enable calibration of the receive termination. If this bit is set and a 16kΩ resistor is on the RESREF pin, then a low-to-high transition on the CRIMP bit will initiate a calibration cycle for the receive internal termination. The user should wait at least 5µs before setting the CRIMP bit. Bit 1: Jitter Attenuator Position Select (JAPS). When the JAPS bit is set, the jitter attenuator will be in the receive path for each channel. The individual LIU register IJAPS settings will be ignored when this bit is set. When reset, the IJAPS register will have control. Bit 0: Jitter Attenuator Enable (JAE). When this bit is set the jitter attenuator is enabled. The settings in the IJAE register will be ignored if this register is set. If reset, the IJAE register will have control. 57 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 JABWS1 0 TST Template Select Transmitter Register 10h 6 JABWS0 0 5 RHPMC 0 4 3 — — 0 0 2 TST2 0 1 TST1 0 0 TST0 0 Bits 7 and 6: Jitter Attenuator Bandwidth Selection [1:0] (JABWS[1:0]). In E1 mode, JABWS[1:0] is used to control the bandwidth of the jitter attenuator according to the following table: JABWS 00 01 10 11 BANDWIDTH (Hz) 0.625 1.25 2.5 5 Bit 5: Receive Hitless Protection Mode Control (RHPMC). When this bit is set, the receive impedance match on/off selection will be controlled by the OE pin. If OE is high, receive impedance match is on. If OE is low, receive impedance match is off (Internal impedance to RTIP and RRING is high impedance). When this bit is reset, the RIMPON register bit will control receive impedance match. Bits 2 to 0: TST Template Select Transceiver [2:0] (TST[2:0]). TST[2:0] is used to select the transceiver that the Transmit Template Select Register (0x11) will configure for LIUs 1–8. See Table 6-11. Register Address (LIUs 9–16): Bit # Name Default 7 JABWS1 0 30h 6 JABWS0 0 5 RHPMC 0 4 3 — — 0 0 2 TST2 0 1 TST1 0 0 TST0 0 Bits 7 and 6: Jitter Attenuator Bandwidth Selection [1:0] (JABWS[1:0]). In E1 mode, JABWS[1:0] is used to control the bandwidth of the jitter attenuator according to the following table: JABWS 00 01 10 11 BANDWIDTH (Hz) 0.625 1.25 2.5 5 Bit 5: Receive Hitless Protection Mode Control (RHPMC). When this bit is set, the receive impedance match on/off selection will be controlled by the OE pin. If OE is high, receive impedance match is on. If OE is low, receive impedance match is off (internal impedance to RTIP and RRING is high impedance). When this bit is reset, the RIMPON register bit will control receive impedance match. Bits 2 to 0: TST Template Select Transceiver [2:0] (TST[2:0]). TST[2:0] is used to select the transceiver that the Transmit Template Select Register (0x11) will configure for LIUs 9–16. See Table 6-12. 58 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-11. TST Template Select Transmitter Register (LIUs 1–8) TST[2:0] 000 001 010 011 CHANNEL 1 2 3 4 TST[2:0] 100 101 110 111 CHANNEL 5 6 7 8 Table 6-12. TST Template Select Transmitter Register (LIUs 9–16) TST[2:0] 000 001 010 011 CHANNEL 9 10 11 12 TST[2:0] 100 101 110 111 59 of 121 CHANNEL 13 14 15 16 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Register Address (LIUs 9–16): Bit # Name Default 7 RIMPON 0 TS Template Select Register 11h 31h 6 TIMPOFF 0 5 4 — — 0 0 3 TIMPRM 0 2 TS2 0 1 TS1 0 0 TS0 0 Note: This register configures each LIU individually. This register configures the LIU selected by TST.TST[2:0]. Bit 7: Receive Impedance Match On (RIMPON). If this bit is set, internal receive impedance matching is turned on. Otherwise, the receiver is in high impedance. Note that the OE pin can have control instead of this bit when the TST.RHPMC bit is set. Bit 6: Transmit Impedance Termination Off (TIMPOFF). If this bit is set all the internal transmit terminating impedance is turned off. Bit 3: Transmit Impedance Receive Match (TIMPRM). This bit selects the internal transmit termination impedance and receive impedance match for E1 mode and T1/J1 mode. 0 = 75Ω for E1 mode or 100Ω for T1 mode. 1 = 120Ω for E1 mode or 110Ω for J1 mode. Bits 2 to 0: Template Selection [2:0] (TS[2:0]). Bits TS[2:0] are used to select E1 or T1/J1 mode, the template, and the settings for various cable lengths. The impedance termination for the transmitter and impedance match for the receiver are specified by bit TIMPRM. Short-haul or long-haul operation is selected by the SHLHS bit in the individual registers SHLHS (07). See Table 6-13 for bit selection of TS[2:0]. Table 6-13. Template Selection TS[2:0] 011 100 101 110 111 000 001 and 010 011 100 101 110 TEMPLATE SELECTION IMPEDANCE CABLE LOSS LINE LENGTH (ft) (dB) (Ω) 0–133 ABAM 0.6 100/110 133–266 ABAM 1.2 100/110 266–399 ABAM 1.8 100/110 399–533 ABAM 2.4 100/110 533–655 ABAM 3.0 100/110 G.703 coaxial and twisted pair cable 75/120 — — Reserved — 0db CSU 100/110 — -7.5dB CSU 100/110 — -15dB CSU 100/110 — -22.5dB CSU 100/110 60 of 121 OPERATION MODE T1/J1 Short Haul T1 Short Haul T1 Short Haul T1 Short Haul T1 Short Haul E1 Short/Long Haul Short/Long Haul T1/J1 Long Haul T1/J1 Long Haul T1/J1 Long Haul T1/J1 Long Haul DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 OE8 0 6 OE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 OE16 0 OE Output Enable Configuration Register 12h 5 OE6 0 4 OE5 0 3 OE4 0 2 OE3 0 1 OE2 0 0 OE1 0 5 OE14 0 4 OE13 0 3 OE12 0 2 OE11 0 1 OE10 0 0 OE9 0 32h 6 OE15 0 Bits 7 to 0: Output Enable Channel n (OEn). When this bit is reset, the transmitter output for LIUn is high impedance. When this bit is set, the transmitter output for LIUn is enabled. Note that the OE pin will override this setting when low. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 AIS8 0 6 AIS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 AIS16 0 AIS Alarm Indication Signal Status Register 13h 6 AIS15 0 5 AIS6 0 4 AIS5 0 3 AIS4 0 2 AIS3 0 1 AIS2 0 0 AIS1 0 5 AIS14 0 4 AIS13 0 3 AIS12 0 2 AIS11 0 1 AIS10 0 0 AIS9 0 33h Bits 7 to 0: Alarm Indication Signal Channel n (AISn). This bit will be set when AIS is detected for LIUn. The criteria for AIS selection is detailed in Section 5.5.7. The selection of the AIS criteria is done by settings in the LASCS (0D) register. 61 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 AISIE8 0 6 AISIE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 AISIE16 0 AISIE AIS Interrupt Enable Register 14h 5 AISIE6 0 4 AISIE5 0 3 AISIE4 0 2 AISIE3 0 1 AISIE2 0 0 AISIE1 0 5 AISIE14 0 4 AISIE13 0 3 AISIE12 0 2 AISIE11 0 1 AISIE10 0 0 AISIE9 0 34h 6 AISIE15 0 Bits 7 to 0: AIS Interrupt Mask Channel n (AISIEn). When this bit is set, interrupts can be generated for LIUn if AIS status transitions. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 AISI8 0 6 AISI7 0 Register Address (LIUs 9–16): Bit # Name Default 7 AISI16 0 AISI AIS Interrupt Status Register 15h 6 AISI15 0 5 AISI6 0 4 AISI5 0 3 AISI4 0 2 AISI3 0 1 AISI2 0 0 AISI1 0 5 AISI14 0 4 AISI13 0 3 AISI12 0 2 AISI11 0 1 AISI10 0 0 AISI9 0 35h Bits 7 to 0: AIS Interrupt Status Channel n (AISIn). This bit is set when AIS ransitions from a “0 to 1” or “1 to 0” and interrupts are enabled by the AISIE(14) register for LIUn. If set, this bit is cleared on a read operation or when the interrupt enable register is disabled. 62 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Register Address (LIUs 9–16): Bit # Name Default 7 ADDP7 0 ADDP Address Pointer for Bank Selection Register 1Fh 3Fh 6 ADDP6 0 5 ADDP5 0 4 ADDP4 0 3 ADDP3 0 2 ADDP2 0 1 ADDP1 0 0 ADDP0 0 Bits 7 to 0: Address Pointer (ADDP). This pointer is used to switch between pointing to the primary registers, the secondary registers, individual registers, and BERT registers. See Table 6-14 for bank selection. The register space contains control for Channels 1 to 8 from address 00 hex to 1F hex and a duplicate set of registers for control of Channels 9 to 16 from address 20 hex to 3F hex. The ADDP at address 1F hex select the banks for the set of registers for LIUs 1–8. The ADDP register at address 3F select the banks for the set of registers for LIUs 9– 16. Table 6-14. Address Pointer for Bank Selection ADDP[7:0] (HEX) 00 AA 01 02 6.1.2 BANK NAME Primary Bank Secondary Bank Individual LIU Bank BERT Bank Secondary Register Bank The ADDP register must be set to AAh in order to access this bank. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 SRMS8 0 6 SRMS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 SRMS16 0 SRMS Single-Rail Mode Select Register 00h 5 SRMS6 0 4 SRMS5 0 3 SRMS4 0 2 SRMS3 0 1 SRMS2 0 0 SRMS1 0 5 SRMS14 0 4 SRMS13 0 3 SRMS12 0 2 SRMS11 0 1 SRMS10 0 0 SRMS9 0 20h 6 SRMS15 0 Bits 7 to 0: Single-Rail Mode Select Channel n (SRMSn). When this bit is set single-rail mode is selected for the system transmit and receive n. If this bit is reset, dual-rail is selected. 63 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 LCS8 0 6 LCS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 LCS16 0 LCS Line Code Selection Register 01h 5 LCS6 0 4 LCS5 0 3 LCS4 0 2 LCS3 0 1 LCS2 0 0 LCS1 0 5 LCS14 0 4 LCS13 0 3 LCS12 0 2 LCS11 0 1 LCS10 0 0 LCS9 0 21h 6 LCS15 0 Bits 7 to 0: Line Code Select Channel n (LCSn). When this bit is set AMI encoding/decoding is selected for LIUn. If reset, B8ZS or HDB3 encoding/decoding is selected for LIUn. Note that if the GC.CODE register bit is set it will ignore this register. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RPDE8 0 6 RPDE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 RPDE16 0 RPDE Receive Power-Down Enable Register 03h 5 RPDE6 0 4 RPDE5 0 3 RPDE4 0 2 RPDE3 0 1 RPDE2 0 0 RPDE1 0 5 RPDE14 0 4 RPDE13 0 3 RPDE12 0 2 RPDE11 0 1 RPDE10 0 0 RPDE9 0 23h 6 RPDE15 0 Bits 7 to 0: Receive Power-Down Enable Channel n (RPDEn). When this bit is set the receiver for LIUn is powered down. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 TPDE8 0 6 TPDE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 TPDE16 0 TPDE Transmit Power-Down Enable Register 04h 5 TPDE6 0 4 TPDE5 0 3 TPDE4 0 2 TPDE3 0 1 TPDE2 0 0 TPDE1 0 5 TPDE14 0 4 TPDE13 0 3 TPDE12 0 2 TPDE11 0 1 TPDE10 0 0 TPDE9 0 24h 6 TPDE15 0 Bits 7 to 0: Transmit Power-Down Enable Channel n (TPDEn). When this bit is set the transmitter for LIUn is powered down. 64 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 EZDE8 0 6 EZDE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 EZDE16 0 EZDE Excessive Zero Detect Enable Register 05h 5 EZDE6 0 4 EZDE5 0 3 EZDE4 0 2 EZDE3 0 1 EZDE2 0 0 EZDE1 0 5 EZDE14 0 4 EZDE13 0 3 EZDE12 0 2 EZDE11 0 1 EZDE10 0 0 EZDE9 0 25h 6 EZDE15 0 Bits 7 to 0: Excessive Zero Detect Enable Channel n (EZDEn). When this bit is reset excessive zero detection is disabled for LIUn. When this bit is set excessive zero detect enable is enabled. Excessive zero detection is only relevant when HDB3 or B8ZS decoding is enabled (LCS register). Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 CVDEB8 0 6 CVDEB7 0 Register Address (LIUs 9–16): Bit # Name Default 7 CVDEB16 0 CVDEB Code Violation Detect Enable Bar Register 06h 5 CVDEB6 0 4 CVDEB5 0 3 CVDEB4 0 2 CVDEB3 0 1 CVDEB2 0 0 CVDEB1 0 5 CVDEB14 0 4 CVDEB13 0 3 CVDEB12 0 2 CVDEB11 0 1 CVDEB10 0 0 CVDEB9 0 26h 6 CVDEB15 0 Bits 7 to 0: Code Violation Detect Enable Bar Channel n (CVDEBn). If this bit is set, code violation detection is disabled for the LIUn. If this bit is reset, code violation detection is enabled. Code violation detection is only relevant when HDB3 decoding is enabled (LCS register). 65 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit 6.1.3 Individual LIU Register Bank The ADDP register must be set to 01h to access this bank. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 IJAE8 0 6 IJAE7 0 Register Address (LIUs 9–16): Bit # Name Default 7 IJAE16 0 IJAE Individual Jitter Attenuator Enable Register 00h 5 IJAE6 0 4 IJAE5 0 3 IJAE4 0 2 IJAE3 0 1 IJAE2 0 0 IJAE1 0 5 IJAE14 0 4 IJAE13 0 3 IJAE12 0 2 IJAE11 0 1 IJAE10 0 0 IJAE9 0 20h 6 IJAE15 0 Bits 7 to 0: Individual Jitter Attenuator Enable Channel n (IJAEn). When this bit is set, the LIU jitter attenuator n is enabled. Note that if the GC.JAE register bit is set, this register will be ignored. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 IJAPS8 0 6 IJAPS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 IJAPS16 0 IJAPS Individual Jitter Attenuator Position Select Register 01h 5 IJAPS6 0 4 IJAPS5 0 3 IJAPS4 0 2 IJAPS3 0 1 IJAPS2 0 0 IJAPS1 0 5 IJAPS14 0 4 IJAPS13 0 3 IJAPS12 0 2 IJAPS11 0 1 IJAPS10 0 0 IJAPS9 0 21h 6 IJAPS15 0 Bits 7 to 0: Individual Jitter Attenuator Position Select Channel n (IJAPSn). When this bit is set high, the jitter attenuator is in the receive path n; when this bit is default or set low the jitter attenuator is in the transmit path n. Note that if the GC.JAE register bit is set, this register will be ignored. 66 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 IJAFDS8 0 6 IJAFDS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 IJAFDS16 0 IJAFDS Individual Jitter Attenuator FIFO Depth Select Register 02h 5 IJAFDS6 0 4 IJAFDS5 0 3 IJAFDS4 0 2 IJAFDS3 0 1 IJAFDS2 0 0 IJAFDS1 0 5 IJAFDS14 0 4 IJAFDS13 0 3 IJAFDS12 0 2 IJAFDS11 0 1 IJAFDS10 0 0 IJAFDS9 0 22h 6 IJAFDS15 0 Bits 7 to 0: Individual Jitter Attenuator FIFO Depth Select n (IJAFDSn). When this bit is set for LIUn the jitter attenuator FIFO depth will be 128 bits. When reset the jitter attenuator FIFO depth will be 32 bits. Note that if the GC.IJAFDS register bit is set, this register will be ignored. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 IJAFLT8 0 6 IJAFLT7 0 Register Address (LIUs 9–16): Bit # Name Default 7 IJAFLT16 0 IJAFLT Individual Jitter Attenuator FIFO Limit Trip Register 03h 5 IJAFLT6 0 4 IJAFLT5 0 3 IJAFLT4 0 2 IJAFLT3 0 1 IJAFLT2 0 0 IJAFLT1 0 5 IJAFLT14 0 4 IJAFLT13 0 3 IJAFLT12 0 2 IJAFLT11 0 1 IJAFLT10 0 0 IJAFLT9 0 23h 6 IJAFLT15 0 Bits 7 to 0: Individual Jitter Attenuator FIFO Limit Trip n (IJAFLTn). Set when the jitter attenuator FIFO reaches to within 4 bits of its useful limit for transmitter n. This bit will be cleared when read. Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 ISCPD8 0 6 ISCPD7 0 Register Address (LIUs 9–16): Bit # Name Default 7 ISCPD16 0 ISCPD Individual Short-Circuit Protection Disable Register 04h 5 ISCPD6 0 4 ISCPD5 0 3 ISCPD4 0 2 ISCPD3 0 1 ISCPD2 0 0 ISCPD1 0 5 ISCPD14 0 4 ISCPD13 0 3 ISCPD12 0 2 ISCPD11 0 1 ISCPD10 0 0 ISCPD9 0 24h 6 ISCPD15 0 Bits 7 to 0: Individual Short-Circuit Protection Disable n. (ISCPDn). When this bit is set the short-circuit protection is disabled for the individual transmitter n. Note that if the GC.SCPD register bit is set, the settings in this register will be ignored. 67 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 IAISEL8 0 6 IAISEL7 0 Register Address (LIUs 9–16): Bit # Name Default 7 IAISEL16 0 IAISEL Individual AIS Select Register 05h 5 IAISEL6 0 4 IAISEL5 0 3 IAISEL4 0 2 IAISEL3 0 1 IAISEL2 0 0 IAISEL1 0 5 IAISEL14 0 4 IAISEL13 0 3 IAISEL12 0 2 IAISEL11 0 1 IAISEL10 0 0 IAISEL9 0 25h 6 IAISEL15 0 Bits 7 to 0: Individual AIS Enable During Loss n (IAISELn). When this bit is set, individual AIS enable during loss is enabled for the individual receiver n, and AIS is sent to the system side upon detection of an LOS. Note that if the GC.AISEL register bit is set, the settings in this register will be ignored. 68 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit MC Master Clock Select Register 06h Register Name: Register Description: Register Address: Bit # Name Default 7 PCLKI1 0 6 PCLKI0 0 5 TECLKE 0 4 CLKAE 0 3 MPS1 0 2 MPS0 0 1 FREQS 0 0 PLLE 0 Bits 7 and 6: PLL Clock Input [1:0] (PCLKI[1:0]). These bits select the input into to the PLL. 00: MCLK is used. 01: RCLK1 to 8 is used based on the selection in register CCR. 10: RCLK9 to 16 is used based on the selection in register CCR. 11: Reserved. Bit 5: T1/E1 Clock Enable (TECLKE). When this bit is set the TECLK output is enabled. If not set TECLK will be disabled and the TECLK output is a LOS output. TECLK requires PLLE to be set for correct functionality. Bit 4: Clock A Enable (CLKAE). When this bit is set the CLKA output is enabled. If not set CLKA will be disabled and the CLKA output is a LOS output. CLKA requires PLLE to be set for correct functionality. Bits 3 and 2: Master Period Select [1:0] (MPS[1:0]). These bits MPS[1:0] selects the external MCLK frequency for the DS26334. See Table 6-15 for details. This register when written to will also controller functionality of Channels 9 to 16. Bit 1: Frequency Select (FREQS). In conjunction with MPS[1:0] selects the external MCLK frequency for the DS26334. If this bit is set the external Master clock can be 1.544MHz or multiple thereof. If not set the external master clock can be 2.048MHz or multiple thereof. See Table 6-15 for details. This register when written to will also controller functionality of Channels 9 to 16. Bit 0: Phase Lock Loop Enable (PLLE). When this bit is set the phase lock loop is enabled. If not set MCLK will be the applied input clock. Table 6-15. DS26334 MCLK Selections PLLE MPS1, MPS0 0 0 1 1 1 1 1 1 1 1 xx xx 00 01 10 11 00 01 10 11 MCLK, MHz ±50ppm 1.544 2.048 1.544 3.088 6.176 12.352 2.048 4.096 8.192 16.384 FREQS MODE x x 1 1 1 1 0 0 0 0 T1 E1 T1/J1 or E1 T1/J1 or E1 T1/J1 or E1 T1/J1 or E1 T1/J1 or E1 T1/J1 or E1 T1/J1 or E1 T1/J1 or E1 69 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 SHLHS8 0 6 SHLHS7 0 Register Address (LIUs 9–16): Bit # Name Default 7 SHLHS16 0 SHLHS Short-Haul/Long-Haul Select Register 07h 5 SHLHS6 0 4 SHLHS5 0 3 SHLHS4 0 2 SHLHS3 0 1 SHLHS2 0 0 SHLHS1 0 5 SHLHS14 0 4 SHLHS13 0 3 SHLHS12 0 2 SHLHS11 0 1 SHLHS10 0 0 SHLHS9 0 27h 6 SHLHS15 0 Bits 7 to 0: Short-Haul/Long-Haul Select n. (SHLHSn). When this bit is set, the long-haul mode is enabled for the individual transmitter n. 70 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RTR2 0 RSMM1 Receive Sensitivity Monitor Mode 1 Register 08h 6 C2RSM2 0 5 C2RSM1 0 4 C2RSM0 0 3 RTR1 0 2 C1RSM2 0 1 C1RSM1 0 0 C1RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 2 (RTR2). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS2). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 6 to 4: Channel 2 Receive Sensitivity/Monitor Select [2:0] (C2RSM[2:0]). Bits C2RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 1 (RTR1). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS1). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 1 Receive Sensitivity/Monitor Select [2:0] (C1RSM[2:0]). Bits C1RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Register Address (LIUs 9–16): Bit # Name Default 7 RTR10 0 28h 6 C10RSM2 0 5 C10RSM1 0 4 C10RSM0 0 3 RTR9 0 2 C9RSM2 0 1 C9RSM1 0 0 C9RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 10 (RTR10). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS10). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 6 to 4: Channel 10 Receive Sensitivity/Monitor Select [2:0] (C10RSM[2:0]). Bits C10RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 9 (RTR9). If this bit is set the Turns Ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS9). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 9 Receive Sensitivity/Monitor Select [2:0] (C9RSM[2:0]). Bits C9RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. 71 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RTR4 0 RSMM2 Receive Sensitivity Monitor Mode 2 Register 09h 6 C4RSM2 0 5 C4RSM1 0 4 C4RSM0 0 3 RTR3 0 2 C3RSM2 0 1 C3RSM1 0 0 C3RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 4 (RTR4). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS4). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bit 6 to 4: Channel 4 Receive Sensitivity/Monitor Select [2:0] (C4RSM[2:0]). Bits C4RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 3 (RTR3). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS3). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bit 2 to 0: Channel 3 Receive Sensitivity/Monitor Select [2:0] (C3RSM[2:0]). Bits C3RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Register Address (LIUs 9–16): Bit # Name Default 7 RTR12 0 29h 6 C12RSM2 0 5 C12RSM1 0 4 C12RSM0 0 3 RTR11 0 2 C11RSM2 0 1 C11RSM1 0 0 C11RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 12 (RTR12). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS12). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 6 to 4: Channel 12 Receive Sensitivity/Monitor Select [2:0] (C12RSM[2:0]). Bits C12RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 11 (RTR11). If this bit is set the rurns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS11). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 11 Receive Sensitivity/Monitor Select [2:0] (C11RSM[2:0]). Bits C11RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. 72 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RTR6 0 RSMM3 Receive Sensitivity Monitor Mode 3 Register 0Ah 6 C6RSM2 0 5 C6RSM1 0 4 C6RSM0 0 3 RTR5 0 2 C5RSM2 0 1 C5RSM1 0 0 C5RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 6 (RTR6). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS6). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 6 to 4: Channel 6 Receive Sensitivity/Monitor Select [2:0] (C6RSM[2:0]). Bits C6RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 5 (RTR5). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS5). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 5 Receive Sensitivity/Monitor Select [2:0] (C5RSM[2:0]). Bits C5RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Register Address (LIUs 9–16): Bit # Name Default 7 RTR14 0 2Ah 6 C14RSM2 0 5 C14RSM1 0 4 C14RSM0 0 3 RTR13 0 2 C13RSM2 0 1 C13RSM1 0 0 C13RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 14 (RTR14). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS14). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 6 to 4: Channel 14 Receive Sensitivity/Monitor Select [2:0] (C14RSM[2:0]). Bits C14RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 13 (RTR13). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS13). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 13 Receive Sensitivity/Monitor Select [2:0] (C13RSM[2:0]). Bits C13RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. 73 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default 7 RTR8 0 RSMM4 Receive Sensitivity Monitor Mode 4 Register 0Bh 6 C8RSM2 0 5 C8RSM1 0 4 C8RSM0 0 3 RTR7 0 2 C7RSM2 0 1 C7RSM1 0 0 C7RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 8 (RTR8). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS8). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 6 to 4: Channel 8 Receive Sensitivity/Monitor Select [2:0] (C8RSM[2:0]). Bits C8RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 7 (RTR7). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using long-haul mode (SHLHS7). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 7 Receive Sensitivity/Monitor Select [2:0] (C7RSM[2:0]). Bits C7RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Register Address (LIUs 9–16): Bit # Name Default 7 RTR16 0 2Bh 6 C16RSM2 0 5 C16RSM1 0 4 C16RSM0 0 3 RTR15 0 2 C15RSM2 0 1 C15RSM1 0 0 C15RSM0 0 Bit 7: Receiver Transformer Turns Ratio Channel 16 (RTR16). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS16). Note that in order to use fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bit 6 to 4: Channel 16 Receive Sensitivity/Monitor Select [2:0] (C16RSM[2:0]). Bits C16RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. Bit 3: Receiver Transformer Turns Ratio Channel 15 (RTR15). If this bit is set the turns ratio is 1:1 on the receiver side. This bit should be set when a 1:1 receiver transformer is used and is recommended when using longhaul mode (SHLHS15). Note that in order to use the fully internal receive impedance termination, a 1:1 transformer must be used and this bit must be set to 1. Bits 2 to 0: Channel 15 Receive Sensitivity/Monitor Select [2:0] (C15RSM[2:0]). Bits C15RSM[2:0] are used to select the receiver sensitivity level and the monitor mode resistive gain. See Table 6-16. 74 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-16. Receiver Sensitivity/Monitor Mode Gain Selection RECEIVER MONITOR MODE DISABLED CnRSM[2:0], T1/ E1 MODE No flat gain No flat gain No flat gain 000 001 010 No flat gain 011 Receiver monitor mode enabled Flat gain Flat gain Flat gain Flat gain CnRSM[2:0] Max cable loss 100 101 110 111 30 22.5 17.5 12 Register Name: Register Description: Register Address (LIUs 1–8): Bit # Name Default RECEIVER SENSITIVITY (MAXIMUM LOSS) (dB) 12 18 30 36 for T1, 43 for E1 7 C2RSL3 0 RECEIVER MONITOR MODE GAIN SETTINGS (dB) 0 0 0 0 LOSS DECLARATION LEVEL (dB) 15 21 33 39 for T1,46 for E1 Receiver monitor mode gain settings 14 20 26 32 — 37 45.5 47.5 47 RSL1 Receive Signal Level Indicator 1 Register 0Ch 6 C2RSL2 0 5 C2RSL1 0 4 C2RSL0 0 3 C1RSL3 0 2 C1RSL2 0 1 C1RSL1 0 0 C1RSL0 0 Bits 7 to 4: Channel 2 Receive Signal Level [3:0] (C2RSL[3:0]). C2RSL[3:0] bits provide the receive signal lLevel as shown in Table 6-17. Bits 3 to 0: Channel 1 Receive Signal Level [3:0] (C1RSL[3:0]). C1RSL[3:0] bits provide the receive signal level as shown in Table 6-17. Register Address (LIUs 9–16): Bit # Name Default 7 C10RSL3 0 2Ch 6 C10RSL2 0 5 C10RSL1 0 4 C10RSL0 0 3 C9RSL3 0 2 C9RSL2 0 1 C9RSL1 0 0 C9RSL0 0 Bits 7 to 4: Channel 10 Receive Signal Level [3:0] (C10RSL[3:0]). C10RSL[3:0] bits provide the receive signal level as shown in Table 6-17. Bits 3 to 0: Channel 9 Receive Signal Level [3:0] (C9RSL[3:0]). C9RSL[3:0] bits provide the receive signal level as shown in Table 6-17. 75 of 121 DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit Table 6-17. Receiver Signal Level CnRSL3 to CnRSL0 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 RECEIVE LEVEL (dB) T1 E1 >-2.5 >-2.5 -2.5 to -5 -2.5 to -5 -5 to -7.5 -5 to -7.5 -7.5 to -10 -7.5 to -10 -10 to -12.5 -10 to -12.5 -12.5 to -15 -12.5 to -15 -15 to -17.5 -15 to -17.5 -17.5 to -20 -17.5 to -20 -20 to -22.5 -20 to -22.5 -22.5 to -25 -22.5 to -25 -25 to -27.5 -25 to -27.5 -27.5 to -30 -27.5 to -30 -30 to -34 -30 to -34