82V2044DAG

QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT IDT82V2044 FEATURES ! ! ! ! ! ! ! Fully integrated quad T1/E1 short haul line interface which supports 100 Ω T1 twisted pair, 120 Ω E1 twisted pair and 75 Ω E1 coaxial applications Selectable Single Rail mode or Dual Rail mode and AMI or B8ZS/HDB3 encoder/decoder Built-in transmit pre-equalization meets G.703 & T1.102 Selectable transmit/receive jitter attenuator meets ETSI CTR12/ 13, ITU G.736, G.742, G.823 and AT&T Pub 62411 specifications SONET/SDH optimized jitter attenuator meets ITU G.783 mapping jitter specification Digital/Analog LOS detector meets ITU G.775, ETS 300 233 and T1.231 ITU G.772 non-intrusive monitoring for in-service testing for any one of channel 1 to channel 3 ! ! ! ! ! ! ! ! ! Low impedance transmit drivers with high-Z Selectable hardware and parallel/serial host interface Local, Remote and Inband Loopback test functions Hitless Protection Switching (HPS) for 1 + 1 protection without relays JTAG boundary scan for board test 3.3 V supply with 5 V tolerant I/O Low power consumption Operating temperature range: -40°C to +85°C Available in 144-pin Thin Quad Flat Pack (TQFP) and 160-pin Plastic Ball Grid Array (PBGA) packages Green package options available FUNCTIONAL BLOCK DIAGRAM One of Four Identical Channels LOS Detector RTIPn Slicer RRINGn Analog Loopback Peak Detector TTIPn CLK&Data Recovery (DPLL) B8ZS/ HDB3/AMI Decoder Jitter Attenuator Digital Loopback Line Driver TRINGn LOSn Remote Loopback IBLC Detector AIS Detector B8ZS/ HDB3/AMI Encoder Jitter Attenuator Waveform Shaper RCLKn RDn/RDPn CVn/RDNn TCLKn TDn/TDPn BPVIn/TDNn Transmit All Ones JTAG TAP VDDIO VDDT VDDD VDDA TRST TCK TMS TDI TDO Control Interface OE CLKE MODE[2:0] CS/JAS TS2/SCLK/ALE/AS TS1/RD/R/W TS0/SDI/WR/DS SDO/RDY/ACK INT LP[3:0]/D[7:0]/AD[7:0] MC[3:0]/A[4:0] Register File Clock Generator MCLK G.772 Monitor Figure-1 Block Diagram IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. 1  2005 Integrated Device Technology, Inc. September 22, 2005 DSC-6531/- IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT DESCRIPTION The IDT82V2044 offers hardware control mode and software control mode. Software control mode works with either serial host interface or parallel host interface. The latter works via an Intel/Motorola compatible 8-bit parallel interface for both multiplexed or non-multiplexed applications. Hardware control mode uses multiplexed pins to select different operation modes when the host interface is not available to the device. The IDT82V2044 is a single chip, 4-channel T1/E1 short haul PCM transceiver with a reference clock of 1.544 MHz (T1) or 2.048 MHz (E1). The IDT82V2044 contains 4 transmitters and 4 receivers. All the receivers and transmitters can be programmed to work either in Single Rail mode or Dual Rail mode. B8ZS/HDB3 or AMI encoder/ decoder is selectable in Single Rail mode. Pre-encoded transmit data in NRZ format can be accepted when the device is configured in Dual Rail mode. The receivers perform clock and data recovery by using integrated digital phase-locked loop. As an option, the raw sliced data (no retiming) can be output on the receive data pins. Transmit equalization is implemented with low-impedance output drivers that provide shaped waveforms to the transformer, guaranteeing template conformance. The IDT82V2044 also provides loopback and JTAG boundary scan testing functions. Using the integrated monitoring function, the IDT82V2044 can be configured as a 4-channel transceiver with nonintrusive protected monitoring points. The IDT82V2044 can be used for SDH/SONET multiplexers, central office or PBX, digital access cross connects, digital radio base stations, remote wireless modules and microwave transmission systems. A jitter attenuator is integrated in the IDT82V2044 and can be switched into either the transmit path or the receive path for all channels. The jitter attenuation performance meets ETSI CTR12/13, ITU G.736, G.742, G.823, and AT&T Pub 62411 specifications. IDT82V2044 (Top View) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 BPVI3/TDN3 RCLK3 RD3/RDP3 CV3/RDN3 LOS3 RTIP3 RRING3 VDDT TTIP3 TRING3 GNDT RRING2 RTIP2 GNDT TRING2 TTIP2 VDDT RTIP1 RRING1 VDDT TTIP1 TRING1 GNDT RRING0 RTIP0 GNDT TRING0 TTIP0 VDDT MODE1 LOS0 CV0/RDN0 RD0/RDP0 RCLK0 BPVI0/TDN0 TD0/TDP0 GNDIO GNDIO DNC DNC DNC DNC GNDIO GNDIO GNDIO MCLK MODE2 A4 MC3/A3 MC2/A2 MC1/A1 MC0/A0 VDDIO GNDIO VDDD GNDD LP0/D0/AD0 LP1/D1/AD1 LP2/D2/AD2 LP3/D3/AD3 D4/AD4 D5/AD5 D6/AD6 D7/AD7 TCLK1 TD1/TDP1 BPVI1/TDN1 RCLK1 RD1/RDP1 CV1/RDN1 LOS1 TCLK0 GNDIO DNC DNC DNC DNC OE CLKE VDDT DNC DNC GNDT DNC DNC GNDT DNC DNC VDDT DNC DNC VDDT DNC DNC GNDT DNC DNC GNDT DNC DNC VDDT DNC DNC DNC DNC DNC DNC GNDIO 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 GNDIO GNDIO DNC DNC DNC DNC GNDIO GNDIO GNDIO TDI TDO TCK TMS TRST IC IC VDDIO GNDIO VDDA GNDA MODE0/CODE CS/JAS TS2/SCLK/ALE/AS TS1/RD/R/W TS0/SDI/WR/DS SDO/RDY/ACK INT TCLK2 TD2/TDP2 BPVI2/TDN2 RCLK2 RD2/RDP2 CV2/RDN2 LOS2 TCLK3 TD3/TDP3 PIN CONFIGURATIONS Figure-2 TQFP144 Package Pin Assignment Description 2 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT A B C D E F G H J K L M N P 1 DNC GNDI O DNC GNDI O MCLK MC 1 D6 D7 TCLK 1 RCLK 1 TCLK 0 RCLK 0 1 2 DNC GNDI O DNC GNDI O MODE 2 MC 2 D0 D2 D5 MODE 1 TDP 1 RDP 1 TDP 0 RDP 0 2 3 DNC GNDI O DNC GNDI O DNC MC 3 MC 0 D1 D4 LOS 1 TDN 1 RDN 1 TDN 0 RDN 0 3 4 VDDT VDDT VDDT VDDT DNC A4 D3 LOS 0 VDDT VDDT VDDT VDDT 4 5 DNC DNC DNC DNC TTIP 1 TRING 1 TTIP 0 TRING 0 5 6 GNDT GNDT GNDT GNDT GNDT GNDT GNDT GNDT 6 7 DNC DNC DNC DNC RRING 1 RTIP 1 RRING 0 RTIP 0 7 8 DNC DNC DNC DNC RRING 2 RTIP 2 RRING 3 RTIP 3 8 9 GNDT GNDT GNDT GNDT GNDT GNDT GNDT GNDT 9 10 DNC DNC DNC DNC TTIP 2 TRING 2 TTIP 3 TRING 3 10 11 VDDT VDDT VDDT VDDT DNC TMS GNDIO GNDA CS LOS 3 VDDT VDDT VDDT VDDT 11 12 DNC GNDI O DNC GNDI O DNC TDI TRST MODE 0 TS 2 LOS 2 TDN 2 RDN 2 TDN 3 RDN 3 12 13 DNC GNDI O DNC GNDI O CLKE TDO IC IC TS 1 INT TDP 2 RDP 2 TDP 3 RDP 3 13 14 DNC GNDI O DNC GNDI O OE TCK TS 0 SDO TCLK 2 RCLK 2 TCLK 3 RCLK 3 14 A B C D E F J K L M N P VDDIO VDDD GNDIO GNDD IDT82V2044 (Bottom View) VDDIO VDDA G H Figure-3 PBGA160 Package Pin Assignment Pin Configurations 3 September 22, 2005 IDT82V2044 1 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT PIN DESCRIPTION Table-1 Pin Description Name Type Pin No. TQFP144 Description PBGA160 Transmit and Receive Line Interface TTIP0 TTIP1 TTIP2 TTIP3 TRING0 TRING1 TRING2 TRING3 RTIP0 RTIP1 RTIP2 RTIP3 RRING0 RRING1 RRING2 RRING3 Analog Output Analog Input 45 52 57 64 N5 L5 L10 N10 46 51 58 63 P5 M5 M10 P10 48 55 60 67 P7 M7 M8 P8 49 54 61 66 N7 L7 L8 N8 TTIPn/TRINGn: Transmit Bipolar Tip/Ring for Channel 0~3 These pins are the differential line driver outputs. They will be in high-Z state if pin OE is low or the corresponding pin TCLKn is low (pin OE is global control, while pin TCLKn is per-channel control). In host mode, each pin can be in high-Z by programming a ‘1’ to the corresponding bit in register OE(1). RTIPn/RRINGn: Receive Bipolar Tip/Ring for Channel 0~3 These pins are the differential line receiver inputs. Transmit and Receive Digital Data Interface TDn: Transmit Data for Channel 0~3 When the device is in Single Rail mode, the NRZ data to be transmitted is input on this pin. Data on TDn is sampled into the device on the falling edges of TCLKn, and encoded by AMI or B8ZS/HDB3 line code rules before being transmitted to the line. TD0/TDP0 TD1/TDP1 TD2/TDP2 TD3/TDP3 37 30 80 73 N2 L2 L13 N13 38 31 79 72 N3 L3 L12 N12 I BPVI0/TDN0 BPVI1/TDN1 BPVI2/TDN2 BPVI3/TDN3 BPVIn: Bipolar Violation Insertion for Channel 0~3 Bipolar violation insertion is available in Single Rail mode 2 (see Table-2 on page 13 and Table-3 on page 14) with AMI enabled. A low-to-high transition on this pin will make the next logic one to be transmitted on TDn the same polarity as the previous pulse, and violate the AMI rule. This is for testing. TDPn/TDNn: Positive/Negative Transmit Data for Channel 0~3 When the device is in Dual Rail Mode, the NRZ data to be transmitted for positive/negative pulse is input on this pin. Data on TDPn/TDNn are sampled on the falling edges of TCLKn. The line code in dual rail mode is as the follow: TDPn 0 0 1 1 TDNn 0 1 0 1 Output Pulse Space Negative Pulse Positive Pulse Space Pulling pin TDNn high for more than 16 consecutive TCLK clock cycles will configure the corresponding channel into Single Rail mode 1 (see Table-2 on page 13 and Table-3 on page 14). 1. Register name is indicated by bold capital letter. For example, OE indicates Output Enable Register. Pin Description 4 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name Type Pin No. TQFP144 Description PBGA160 TCLKn: Transmit Clock for Channel 0~3 The clock of 1.544 MHz (for T1 mode) or 2.048 MHz (for E1 mode) for transmit is input on this pin. The transmit data at TDn/TDPn or TDNn is sampled into the device on the falling edges of TCLKn. Pulling TCLKn high for more than 16 MCLK cycles, the corresponding transmitter is set in Transmit All Ones (TAOS) state (when MCLK is clocked). In TAOS state, the TAOS generator adopts MCLK as the clock reference. If TCLKn is low, the corresponding transmit channel is set into power down state, while driver output ports become high-Z. Different combinations of TCLKn and MCLK result in different transmit mode. It is summarized as the follows: TCLK0 TCLK1 TCLK2 TCLK3 I 36 29 81 74 N1 L1 L14 N14 MCLK Clocked Clocked Clocked High/Low High/Low TCLKn Clocked Transmit Mode Normal operation Transmit All Ones (TAOS) signals to the line side in the corresponding High (≥ 16 MCLK) transmit channel. Low (≥ 64 MCLK) The corresponding transmit channel is set into power down state. TCLKn is clocked Normal operation Transmit All Ones (TAOS) signals to the line side TCLKn is high in the corresponding transmit channel. (≥ 16 TCLK1) Corresponding transmit channel is set into power TCLKn is low TCLK1 is clocked down state. (≥ 64 TCLK1) The receive path is not affected by the status of TCLK1. When MCLK is high, all receive paths just slice the incoming data stream. When MCLK is low, all the receive paths are powered down. TCLK1 is unavailAll four transmitters (TTIPn & TRINGn) will be in high-Z. able. RDn: Receive Data for Channel 0~3 In Single Rail mode, the received NRZ data is output on this pin. The data is decoded by AMI or B8ZS/ HDB3 line code rule. RD0/RDP0 RD1/RDP1 RD2/RDP2 RD3/RDP3 CV0/RDN0 CV1/RDN1 CV2/RDN2 CV3/RDN3 O High-Z Pin Description 40 33 77 70 P2 M2 M13 P13 41 34 76 69 P3 M3 M12 P12 CVn: Code Violation for Channel 0~3 In Single Rail mode, the bipolar violation, code violation and excessive zeros will be reported by driving pin CVn high for a full clock cycle. However, only bipolar violation is indicated when AMI decoder is selected. RDPn/RDNn: Positive/Negative Receive Data for Channel 0~3 In Dual Rail Mode with clock recovery, these pins output the NRZ data. A high signal on RDPn indicates the receipt of a positive pulse on RTIPn/RRINGn while a high signal on RDNn indicates the receipt of a negative pulse on RTIPn/RRINGn. The output data at RDn or RDPn/RDNn are clocked out on the falling edges of RCLK when the CLKE input is low, or are clocked out on the rising edges of RCLK when CLKE is high. In Dual Rail Mode without clock recovery, these pins output the raw RZ sliced data. In this data recovery mode, the active polarity of RDPn/RDNn is determined by pin CLKE. When pin CLKE is low, RDPn/RDNn is active low. When pin CLKE is high, RDPn/RDNn is active high. In hardware mode, RDn or RDPn/RDNn will remain active during LOS. In host mode, these pins will either remain active or insert alarm indication signal (AIS) into the receive path, determined by bit AISE in register GCF. RDn or RDPn/RDNn is set into high-Z when the corresponding receiver is powered down. 5 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name RCLK0 RCLK1 RCLK2 RCLK3 Type O High-Z MCLK LOS0 LOS1 LOS2 LOS3 Pin No. TQFP144 39 32 78 71 Description PBGA160 P1 M1 M14 P14 RCLKn: Receive Clock for Channel 0~3 In clock recovery mode, this pin outputs the recovered clock from signal received on RTIPn/RRINGn. The received data are clocked out of the device on the rising edges of RCLKn if pin CLKE is high, or on falling edges of RCLKn if pin CLKE is low. In data recovery mode, RCLKn is the output of an internal exclusive OR (XOR) which is connected with RDPn and RDNn. The clock is recovered from the signal on RCLKn. If Receiver n is powered down, the corresponding RCLKn is in high-Z. I 10 E1 MCLK: Master Clock This is an independent, free running reference clock. A clock of 1.544 MHz (for T1 mode) or 2.048 MHz (for E1 mode) is supplied to this pin as the clock reference of the device for normal operation. In receive path, when MCLK is high, the device slices the incoming bipolar line signal into RZ pulse (Data Recovery mode). When MCLK is low, all the receivers are powered down, and the output pins RCLKn, RDPn and RDNn are switched to high-Z. In transmit path, the operation mode is decided by the combination of MCLK and TCLKn (see TCLKn pin description for details). NOTE: Wait state generation via RDY/ACK is not available if MCLK is not provided. O 42 35 75 68 K4 K3 K12 K11 LOSn: Loss of Signal Output for Channel 0~3 A high level on this pin indicates the loss of signal when there is no transition over a specified period of time or no enough ones density in the received signal. The transition will return to low automatically when there is enough transitions over a specified period of time with a certain ones density in the received signal. The LOS assertion and desertion criteria are described in 2.4.4 Loss of Signal (LOS) Detection. Hardware/Host Control Interface MODE2: Control Mode Select 2 The signal on this pin determines which control mode is selected to control the device: MODE2 Low VDDIO/2 High I MODE2 (Pulled to VDDIO/2) 11 E2 Control Interface Hardware Mode Serial Host Interface Parallel Host Interface Hardware control pins include MODE[2:0], TS[2:0], LP[3:0], CODE, CLKE, JAS and OE. Serial host Interface pins include CS, SCLK, SDI, SDO and INT. Parallel host Interface pins include CS, A[4:0], D[7:0], WR/DS, RD/R/W, ALE/AS, INT and RDY/ACK. The device supports multiple parallel host interface as follows (refer to MODE1 and MODE0 pin descriptions below for details): MODE[2:0] 100 101 110 111 MODE1 Pin Description I 43 K2 Host Interface Non-multiplexed Motorola Interface Non-multiplexed Intel Interface Multiplexed Motorola Interface Multiplexed Intel Interface MODE1: Control Mode Select 1 In parallel host mode, the parallel interface operates with separate address bus and data bus when this pin is low, and operates with multiplexed address and data bus when this pin is high. In serial host mode or hardware mode, this pin should be grounded. 6 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name Type Pin No. TQFP144 Description PBGA160 MODE0: Control Mode Select 0 In parallel host mode, the parallel host interface is configured for Motorola compatible hosts when this pin is low, or for Intel compatible hosts when this pin is high. MODE0/CODE I 88 H12 CODE: Line Code Rule Select In hardware control mode, the B8ZS (for T1 mode)/HDB3 (for E1 mode) encoder/decoder is enabled when this pin is low, and AMI encoder/decoder is enabled when this pin is high. The selections affect all the channels. In serial host mode, this pin should be grounded. CS: Chip Select (Active Low) In host mode, this pin is asserted low by the host to enable host interface. A high to low transition must occur on this pin for each read/write operation and the level must not return to high until the operation is over. I CS/JAS (Pulled to VDDIO/2) 87 J11 JAS: Jitter Attenuator Select In hardware control mode, this pin globally determines the Jitter Attenuator position: JAS Low VDDIO/2 High Jitter Attenuator (JA) Configuration JA in transmit path JA not used JA in receive path TS2: Template Select 2 In hardware control mode, the signal on this pin is the most significant bit for the transmit template select. Refer to 2.5.1 Waveform Shaper for details. TS2/SCLK/ ALE/AS I 86 J12 SCLK: Shift Clock In serial host mode, the signal on this pin is the shift clock for the serial interface. Data on pin SDO is clocked out on falling edges of SCLK if pin CLKE is high, or on rising edges of SCLK if pin CLKE is low. Data on pin SDI is always sampled on rising edges of SCLK. ALE: Address Latch Enable In parallel Intel multiplexed host mode, the address on AD[4:0] is sampled into the device on the falling edges of ALE (signals on AD[7:5] are ignored). In non-multiplexed host mode, ALE should be pulled high. AS: Address Strobe (Active Low) In parallel Motorola multiplexed host mode, the address on AD[4:0] is latched into the device on the falling edges of AS (signals on AD[7:5] are ignored). In non-multiplexed host mode, AS should be pulled high. TS1: Template Select 1 In hardware control mode, the signal on this pin is the second most significant bit for the transmit template select. Refer to 2.5.1 Waveform Shaper for details. TS1/RD/R/W I 85 J13 RD: Read Strobe (Active Low) In parallel Intel multiplexed or non-multiplexed host mode, this pin is active low for read operation. R/W: Read/Write Select In parallel Motorola multiplexed or non-multiplexed host mode, the pin is active low for write operation and high for read operation. Pin Description 7 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name Type Pin No. TQFP144 Description PBGA160 TS0: Template Select 0 In hardware control mode, the signal on this pin is the least significant bit for the transmit template select. Refer to 2.5.1 Waveform Shaper for details. SDI: Serial Data Input In serial host mode, this pin input the data to the serial interface. Data on this pin is sampled on the rising edges of SCLK. TS0/SDI/WR/ DS I 84 J14 WR: Write Strobe (Active Low) In parallel Intel host mode, this pin is active low during write operation. The data on D[7:0] (in non-multiplexed mode) or AD[7:0] (in multiplexed mode) is sampled into the device on the rising edges of WR. DS: Data Strobe (Active Low) In parallel Motorola host mode, this pin is active low. During a write operation (R/W = 0), the data on D[7:0] (in non-multiplexed mode) or AD[7:0] (in multiplexed mode) is sampled into the device on the rising edges of DS. During a read operation (R/W = 1), the data is driven to D[7:0] (in non-multiplexed mode) or AD[7:0] (in multiplexed mode) by the device on the rising edges of DS. In parallel Motorola non-multiplexed host mode, the address information on the 5 bits of address bus A[4:0] are latched into the device on the falling edges of DS. SDO: Serial Data Output In serial host mode, the data is output on this pin. In serial write operation, SDO is always in high-Z. In serial read operation, SDO is in high-Z only when SDI is in address/command byte. Data on pin SDO is clocked out of the device on the falling edges of SCLK if pin CLKE is high, or on the rising edges of SCLK if pin CLKE is low. SDO/RDY/ACK O 83 K14 RDY: Ready Output In parallel Intel host mode, the high level of this pin reports to the host that bus cycle can be completed, while low reports the host must insert wait states. ACK: Acknowledge Output (Active Low) In parallel Motorola host mode, the low level of this pin indicates that valid information on the data bus is ready for a read operation or acknowledges the acceptance of the written data during a write operation. INT O Open Drain 82 K13 INT: Interrupt (Active Low) This is the open drain, active low interrupt output. Four sources may cause the interrupt. Refer to 2.20 Interrupt Handling for details. LPn: Loopback Select 3~0 In hardware control mode, pin LPn configures the corresponding channel in different loopback mode, as follows: D7/AD7 D6/AD6 D5/AD5 D4/AD4 LP3/D3/AD3 LP2/D2/AD2 LP1/D1/AD1 LP0/D0/AD0 I/O High-Z 28 27 26 25 24 23 22 21 K1 J1 J2 J3 J4 H2 H3 G2 LPn Low VDDIO/2 High Loopback Configuration Remote Loopback No loopback Analog Loopback Refer to 2.13 Loopback Mode for details. In hardware control mode, D4 to D7 should be tied to VDDIO/2. Dn: Data Bus 7~0 In non-multiplexed host mode, these pins are the bi-directional data bus. ADn: Address/Data Bus 7~0 In multiplexed host mode, these pins are the multiplexed bi-directional address/data bus. In serial host mode, these pins should be grounded. Pin Description 8 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name Type A4 MC3/A3 MC2/A2 MC1/A1 MC0/A0 I Pin No. TQFP144 12 13 14 15 16 Description PBGA160 F4 F3 F2 F1 G3 MCn: Performance Monitor Configuration 3~0 In hardware control mode, A4 must be connected to GND. MC[3:0] are used to select one transmitter or receiver of channel 1 to 4 for non-intrusive monitoring. Channel 0 is used as the monitoring channel. If a transmitter is monitored, signals on the corresponding pins TTIPn and TRINGn are internally transmitted to RTIP0 and RRING0. If a receiver is monitored, signals on the corresponding pins RTIPn and RRINGn are internally transmitted to RTIP0 and RRING0. The clock and data recovery circuit in Receiver 0 can then output the monitored clock to pin RCLK0 as well as the monitored data to RDP0 and RDN0 pins. The signals monitored by channel 0 can be routed to TTIP0/TRING0 by activating Remote Loopback in this channel. Performance Monitor Configuration determined by MC[3:0] is shown below. Note that if MC[2:0] = 000, the device is in normal operation of all the channels. MC[3:0] Monitoring Configuration 0000 Normal operation without monitoring 0001 Monitor Receiver 1 0010 Monitor Receiver 2 0011 Monitor Receiver 3 0100 0101 Reserved 0110 0111 1000 Normal operation without monitoring 1001 Monitor Transmitter 1 1010 Monitor Transmitter 2 1011 Monitor Transmitter 3 1100 1101 Reserved 1110 1111 An: Address Bus 4~0 When pin MODE1 is low, the parallel host interface operates with separate address and data bus. In this mode, the signal on this pin is the address bus of the host interface. OE I CLKE I 114 115 E14 OE: Output Driver Enable Pulling this pin low can drive all driver output into high-Z for redundancy application without external mechanical relays. In this condition, all other internal circuits remain active. E13 CLKE: Clock Edge Select The signal on this pin determines the active edge of RCLKn and SCLK in clock recovery mode, or determines the active level of RDPn and RDNn in the data recovery mode. See 2.3 Clock Edges on page 14 for details. JTAG Signals I TRST 95 G12 TRST: JTAG Test Port Reset (Active Low) This is the active low asynchronous reset to the JTAG Test Port. This pin has an internal pull-up resistor and can be left disconnected. 96 F11 TMS: JTAG Test Mode Select The signal on this pin controls the JTAG test performance and is clocked into the device on the rising edges of TCK. This pin has an internal pull-up resistor and it can be left disconnected. F14 TCK: JTAG Test Clock This pin input the clock of the JTAG Test. The data on TDI and TMS are clocked into the device on the rising edges of TCK, while the data on TDO is clocked out of the device on the falling edges of TCK. This pin should be connected to GNDIO or VDDIO pin when unused. Pull-up I TMS Pull-up TCK Pin Description I 97 9 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name Type Pin No. TQFP144 98 F13 TDO: JTAG Test Data Output This pin output the serial data of the JTAG Test. The data on TDO is clocked out of the device on the falling edges of TCK. TDO is a high-Z output signal. It is active only when scanning of data is out. This pin should be left float when unused. 99 F12 TDI: JTAG Test Data Input This pin input the serial data of the JTAG Test. The data on TDI is clocked into the device on the rising edges of TCK. This pin has an internal pull-up resistor and it can be left disconnected. O TDO High-Z I TDI Description PBGA160 Pull-up Power Supplies and Grounds - 17 92 G1 G14 3.3 V I/O Power Supply - 1 2 7 8 9 18 91 100 101 102 107 108 109 144 B1 B2 B3 B12 B13 B14 D1 D2 D3 D12 D13 D14 G4 G11 I/O GND - 44 53 56 65 116 125 128 137 A4, A11 B4, B11 C4, C11 D4, D11 L4, L11 M4, M11 N4, N11 P4, P11 3.3 V/5 V Power Supply for Transmitter Driver All VDDT pins must be connected to 3.3 V or all VDDT must be connected to 5 V. It is not allowed to leave any of the VDDT pins open (not-connected) even if the channel is not used. For T1 applications, only 5 V VDDT is supported. GNDT - 47 50 59 62 119 122 131 134 A6, A9 B6, B9 C6, C9 D6, D9 L6, L9 M6, M9 N6, N9 P6, P9 Analog GND for Transmitter Driver VDDD - 19 H1 3.3 V Digital Core Power Supply VDDA - 90 H14 3.3 V Analog Core Power Supply GNDD - 20 H4 Digital Core GND GNDA - 89 H11 Analog Core GND VDDIO GNDIO VDDT Pin Description 10 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-1 Pin Description (Continued) Name Type Pin No. TQFP144 Description PBGA160 Others IC DNC Pin Description - 93 94 G13 H13 IC: Internal Connection Internal use. Leave it open for normal operation. - 3 4 5 6 103 104 105 106 110 111 112 113 117 118 120 121 123 124 126 127 129 130 132 133 135 136 138 139 140 141 142 143 A1 A2 A3 A5 A7 A8 A10 A12 A13 A14 B5 B7 B8 B10 C1 C2 C3 C5 C7 C8 C10 C12 C13 C14 D5 D7 D8 D10 E3 E4 E11 E12 DNC: Do Not Connect 11 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 2 FUNCTIONAL DESCRIPTION 2.1 OVERVIEW The Dual Rail interface consists of TDPn1, TDNn, TCLKn, RDPn, RDNn and RCLKn. Data transmitted from TDPn and TDNn appears on TTIPn and TRINGn at the line interface; data received from the RTIPn and RRINGn at the line interface are transferred to RDPn and RDNn while the recovered clock extracting from the received data stream outputs on RCLKn. In Dual Rail operation, the clock/data recovery mode is selectable. Dual Rail interface with clock recovery shown in Figure-4 is a default configuration mode. Dual Rail interface with data recovery is shown in Figure-5. Pin RDPn and RDNn, in this condition, are raw RZ slice output and internally connected to an EXOR which is fed to the RCLKn output for external clock recovery applications. The IDT82V2044 is a fully integrated quad short-haul line interface unit, which contains four transmit and receive channels for use in either T1 or E1 applications. The receiver performs clock and data recovery. As an option, the raw sliced data (no retiming) can be output to the system. Transmit equalization is implemented with low-impedance output drivers that provide shaped waveforms to the transformer, guaranteeing template conformance. A selectable jitter attenuator may be placed in the receive path or the transmit path. Moreover, multiple testing functions, such as error detection, loopback and JTAG boundary scan are also provided. The device is optimized for flexible software control through a serial or parallel host mode interface. Hardware control is also available. Figure-1 on page 1 shows one of the four identical channels operation. 2.2 In Single Rail mode, data transmitted from TDn appears on TTIPn and TRINGn at the line interface. Data received from the RTIPn and RRINGn at the line interface appears on RDn while the recovered clock extracting from the received data stream outputs on RCLKn. When the device is in single rail interface, the selectable AMI or B8ZS/HDB3 line encoder/decoder is available and any code violation in the received data will be indicated at the CVn pin. The Single Rail mode has 2 sub-modes: Single Rail Mode 1 and Single Rail Mode 2. Single Rail Mode 1, whose interface is composed of TDn, TCLKn, RDn, CVn and RCLKn, is realized by pulling pin TDNn high for more than 16 consecutive TCLK cycles. Single Rail Mode 2, whose interface is composed of TDn, TCLKn, RDn, CVn, RCLKn and BPVIn, is realized by setting bit CRS in register e-CRS2 and bit SING in register e-SING. The difference between them is that, in the latter mode bipolar violation can be inserted via pin BPVIn if AMI line code is selected. T1/E1 MODE SELECTION T1/E1 mode selection configures the device globally. In Hardware Mode, the template selection pins TS[2:0], determine whether the operation mode is T1 or E1 (see Table-9 on page 18). In Software Mode, the register TS determines whether the operation mode is T1 or E1. 2.2.1 SYSTEM INTERFACE The system interface of each channel can be configured to operate in different modes: 1. Single rail interface with clock recovery. 2. Dual rail interface with clock recovery. 3. Dual rail interface with data recovery (that is, with raw data slicing only and without clock recovery). The configuration of the Hardware Mode System Interface is summarized in Table-2. The configuration of the Host (Software) Mode System Interface is summarized Table-3. 1. The footprint ‘n’ (n = 0 - 3) indicates one of the four channels. Each signal pin on system side has multiple functions depending on which operation mode the device is in. 2. The first letter ‘e-’ indicates expanded register. LOS Detector RTIPn Slicer RRINGn One of Four Identical Channels LOSn CLK&Data Recovery (DPLL) Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDPn RDNn Waveform Shaper Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLKn TDPn TDNn Peak Detector TTIPn TRINGn Line Driver Transmit All Ones Note: The grey blocks are bypassed and the dotted blocks are selectable. Figure-4 Dual Rail Interface with Clock Recovery Functional Description 12 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT One of Four Identical Channels LOS Detector RTIPn Slicer RRINGn LOSn CLK&Data Recovery (DPLL) Jitter Attenuator B8ZS/ HDB3/AMI Decoder Waveform Shaper Jitter Attenuator B8ZS/ HDB3/AMI Encoder RCLKn (RDP RDN) RDPn RDNn Peak Detector TTIPn Line Driver TRINGn TCLKn TDPn TDNn Transmit All Ones Note: The grey blocks are bypassed and the dotted blocks are selectable. Figure-5 Dual Rail Interface with Data Recovery LOS Detector RTIPn Slicer RRINGn One of Four Identical Channels LOSn CLK&Data Recovery (DPLL) Jitter Attenuator B8ZS/ HDB3/AMI Decoder Waveform Shaper Jitter Attenuator B8ZS/ HDB3/AMI Encoder RCLKn RDn CVn Peak Detector TTIPn TRINGn Line Driver TCLKn TDn BPVIn/TDNn Transmit All Ones Figure-6 Single Rail Mode Table-2 System Interface Configuration (In Hardware Mode) Pin MCLK Pin TDNn Clocked High (≥ 16 MCLK) Interface Single Rail Mode 1 Clocked Pulse Dual Rail mode with Clock Recovery High Pulse Receive just slices the incoming data. Transmit is determined by the status of TCLKn. Low Pulse Receiver n is powered down. Transmit is determined by the status of TCLKn. Functional Description 13 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-3 System Interface Configuration (In Host Mode) Pin MCLK Pin TDNn CRSn in e-CRS SINGn in e-SING Interface Clocked Clocked Clocked Clocked High Low High Pulse Pulse Pulse Pulse Pulse 0 0 0 1 - 0 1 0 0 - Single Rail Mode 1 Single Rail Mode 2 Dual Rail mode with Clock Recovery Dual Rail mode with Data Recovery Receive just slices the incoming data. Transmit is determined by the status of TCLKn. Receiver n is powered down. Transmit is determined by the status of TCLKn. Table-4 Active Clock Edge and Active Level Pin RDn/RDPn and CVn/RDNn Clock Recovery Slicer Output Pin CLKE 2.3 High RCLKn Active High Active High SCLK Active High Low RCLKn Active High Active Low SCLK Active High CLOCK EDGES data recovery mode, the slicer output is sent to Clock and Data Recovery circuit for abstracting retimed data and optional decoding. The slicer circuit has a built-in peak detector from which the slicing threshold is derived. The slicing threshold is default to 50% (typical) of the peak value. The active edge of RCLKn and SCLK are selectable. If pin CLKE is high, the active edge of RCLKn is the rising edge, as for SCLK, that is falling edge. On the contrary, if CLKE is low, the active edge of RCLK is the falling edge and that of SCLK is rising edge. Pins RDn/RDPn, CVn/ RDNn and SDO are always active high, and those output signals are clocked out on the active edge of RCLKn and SCLK respectively. See Table-4 Active Clock Edge and Active Level on page 14 for details. However, in dual rail mode without clock recovery, pin CLKE is used to set the active level for RDPn/RDNn raw slicing output: High for active high polarity and low for active low. It should be noted that data on pin SDI are always active high and are sampled on the rising edges of SCLK. The data on pin TDn/TDPn or BPVIn/TDNn are also always active high but is sampled on the falling edges of TCLK, despite the level on CLKE. 2.4 Pin SDO Signals with an attenuation of up to 12 dB (from 2.4 V) can be recovered by the receiver. To provide immunity from impulsive noise, the peak detectors are held above a minimum level of 0.150 V typically, despite the received signal level. 2.4.2 CLOCK AND DATA RECOVERY The Clock and Data Recovery is accomplished by Digital Phase Locked Loop (DPLL). The DPLL is clocked 16 times of the received clock rate, i.e. 24.704 MHz in T1 mode or 32.768 MHz in E1 mode. The recovered data and clock from DPLL is then sent to the selectable Jitter Attenuator or decoder for further processing. RECEIVER The clock recovery and data recovery can be selected on a per channel basis by setting bit CRSn in register e-CRS. When bit CRSn is defaulted to ‘0’, the corresponding channel operates in data and clock recovery mode. The recovered clock is output on pin RCLKn and retimed NRZ data are output on pin RDPn/RDNn in Dual Rail mode or on RDn in single rail mode. When bit CRSn is set to ‘1’, Dual Rail mode with data recovery is enabled in the corresponding channel and the clock recovery is bypassed. In this condition, the analog line signal are converted to RZ digital bit streams on the RDPn/RDNn pins and internally connected to an EXOR which is fed to the RCLKn output for external clock recovery applications. In receive path, the line signals couple into RRINGn and RTIPn via a transformer and are converted into RZ digital pulses by a data slicer. Adaptation for attenuation is achieved using an integral peak detector that sets the slicing levels. Clock and data are recovered from the received RZ digital pulses by a digital phase-locked loop that provides jitter accommodation. After passing through the selectable jitter attenuator, the recovered data are decoded using B8ZS/HDB3 or AMI line code rules and clocked out of pin RDn in single rail mode, or presented on RDPn/RDNn in an undecoded dual rail NRZ format. Loss of signal, alarm indication signal, line code violation and excessive zeros are detected. The presence of programmable inband loopback codes are also detected. These various changes in status may be enabled to generate interrupts. If pin MCLK is pulled high, all the receivers will enter the Dual Rail mode with data recovery. In this case, register e-CRS is ignored. 2.4.3 B8ZS/HDB3/AMI LINE CODE RULE Selectable B8ZS/HDB3 and AMI line coding/decoding is provided when the device is configured in Single Rail mode. B8ZS rules for T1 and HDB3 rules for E1 are enabled by setting bit CODE in register GCF 2.4.1 PEAK DETECTOR AND SLICER The slicer determines the presence and polarity of the received pulses. In data recovery mode, the raw positive slicer output appears on RDPn while the negative slicer output appears on RDNn. In clock and Functional Description 14 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 2.4.4 LOSS OF SIGNAL (LOS) DETECTION The Loss of Signal Detector monitors the amplitude and density of the received signal on receiver line before the transformer (measured on port A, B shown in Figure-12). The loss condition is reported by pulling pin LOSn high. At the same time, LOS alarm registers track LOS condition. When LOS is detected or cleared, an interrupt will generate if not masked. In host mode, the detection supports the ANSI T1.231 for T1 mode, ITU G.775 and ETSI 300 233 for E1 mode. In hardware mode, it supports the ITU G.775 and ANSI T1.231. to ‘0’ or pulling pin CODE low. AMI rule is enabled by setting bit CODE in register GCF to ‘1’ or pulling pin CODE high. The settings affect all four channels. Line code rule selection for each channel, if needed, is available by setting bit SINGn in register e-SING to ‘1’ (to activate bit CODEn in register e-CODE) and programming bit CODEn to select line code rules in the corresponding channel: ‘0’ for B8ZS/HDB3, while ‘1’ for AMI. In this case, the value in bit CODE in register GCF or pin CODE for global control is unaffected in the corresponding channel and only affect in other channels. Table-6 summarizes the conditions of LOS in clock recovery mode. In dual rail mode, the decoder/encoder are bypassed. Bit CODE in register GCF, bit CODEn in register e-CODE and pin CODE are ignored. During LOS, the RDPn/RDNn output the sliced data when bit AISE in register GCF is set to ‘0’ or output all ones as AIS (alarm indication signal) when bit AISE is set to ‘1’. The RCLKn is replaced by MCLK only if the bit AISE is set. The configuration of the line code rule is summarized in Table-5. Table-5 Configuration of the Line Code Rule Hardware Mode Line Code Rule CODE Low CODE in GCF 0 0 1 1 0 1 All channels in B8ZS/HDB3 High All channels in AMI CODEn in e-CODE 0/1 0 0/1 1 1 0 Host Mode SINGn in e-SING 0 1 0 1 1 1 Line Code Rule All channels in B8ZS/HDB3 All channels in AMI CHn in AMI CHn in B8ZS/HDB3 Table-6 LOS Condition in Clock Recovery Mode Standard ANSI T1.231 for T1 LOS Detected Continuous Intervals LOS Cleared Density Amplitude(1) Amplitude(1) 1. G.775 for E1 175 below typical 200 mVp ETSI 300 233 for E1 32 2048 (1 ms) below typical 200 mVp below typical 200 mVp 12.5% (16 marks in a sliding 128-bit 12.5% (4 marks in a sliding 32-bit period) with no more than 99 contin- period) with no more than 15 conuous zeros tinuous zeros 12.5% (4 marks in a sliding 32-bit period) with no more than 15 continuous zeros exceed typical 250 mVp exceed typical 250 mVp exceed typical 250 mVp Signal on LOSn High Low LOS levels at device (RTIPn, RRINGn) with all ones signal. For more detail regarding the LOS parameters, please refer to Receiver Characteristics on page 48. 2.4.5 ALARM INDICATION SIGNAL (AIS) DETECTION Alarm Indication Signal is available only in host mode with clock recovery, as shown in Table-7. Table-7 AIS Condition AIS Detected AIS Cleared ITU G.775 for E1 (Register LAC defaulted to ‘0’) ETSI 300 233 for E1 (Register LAC set to ‘1’) ANSI T1.231 for T1 Less than 3 zeros contained in each of two consecutive 512-bit stream are received 3 or more zeros contained in each of two consecutive 512-bit stream are received Less than 3 zeros contained in a 512-bit stream are received 3 or more zeros contained in a 512-bit stream are received Less than 9 zeros contained in a 8192-bit stream (a ones density of 99.9% over a period of 5.3 ms) are received 9 or more zeros contained in a 8192-bit stream are received Functional Description 15 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT and e-CODV are used to determine whether excessive zeros and code violation are reported respectively. When the device is configured in AMI decoding mode, only bipolar violation can be reported. 2.4.6 ERROR DETECTION The device can detect excessive zeros, bipolar violation and B8ZS/ HDB3 code violation, as shown in Figure-7, Figure-8 and Figure-9. All the three kinds of errors are reported in both host mode and hardware mode with B8ZS/HDB3 line code rule used. In host mode, the e-CZER The error detection is available only in single rail mode in which the pin CVn/RDNn is used as error report output (CVn pin). The configuration and report status of error detection are summarized in Table-8. Table-8 Error Detection Hardware Mode Host Mode Line Code Pin CVn Reports Line Code CODVn in e-CODV CZERn in e-CZER AMI Bipolar Violation AMI B8ZS/ HDB3 Bipolar Violation + Code Violation + Excessive Zeros B8ZS/HDB3 0 0 1 1 Pin CVn Reports 0 1 0 1 Bipolar Violation Bipolar Violation + Code Violation Bipolar Violation + Code Violation + Excessive Zeros Bipolar Violation Bipolar Violation + Excessive Zeros RCLKn RTIPn 1 RRINGn 3 5 2 V 4 RDn 1 7 6 2 3 4 5 V 6 CVn Bipolar Violation Bipolar Violation detected Figure-7 AMI Bipolar Violation Code violation RCLKn RTIPn 1 3 5 4 consecutive zeros RRINGn RDn 2 4 1 V 2 3 V 6 4 5 6 CVn Excessive zeros detected Code violation detected Figure-8 HDB3 Code Violation & Excessive Zeros Functional Description 16 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT RCLKn RTIPn 2 4 6 8 8 consecutive zeros RRINGn RDn 1 3 5 1 2 7 3 4 9 5 6 7 8 CVn Excessive zeros detected Figure-9 B8ZS Excessive Zeros 2.5 TRANSMITTER 1.2 In transmit path, data in NRZ format are clocked into the device on TDn and encoded by AMI or B8ZS/HDB3 line code rules when single rail mode is configured or pre-encoded data in NRZ format are input on TDPn and TDNn when dual rail mode is configured. The data are sampled into the device on falling edges of TCLKn. Jitter attenuator, if enabled, is provided with a FIFO through which the data to be transmitted are passing. A low jitter clock is generated by an integral digital phase-locked loop and is used to read data from the FIFO. The shape of the pulses are user programmable to ensure that the T1/E1 pulse template is met after the signal passes through different cable lengths or types. Bipolar violation, for diagnosis, can be inserted on pin BPVIn if AMI line code rule is enabled. 1 Normalized Amplitude 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 0 2.5.1 WAVEFORM SHAPER T1 pulse template, specified in the DSX-1 Cross-Connect by ANSI T1.102, is illustrated in Figure-10. The device has built-in transmit waveform templates, corresponding to 5 levels of pre-equalization for cable of a length from 0 to 655 ft with each increment of 133 ft. 500 750 1000 1250 Time (ns) Figure-10 DSX-1 Waveform Template 1.20 E1 pulse template, specified in ITU-T G.703, is shown in Figure-11. The device has built-in transmit waveform templates for cable of 75 Ω or 120 Ω. 1.00 Normalized Amplitude 0.80 Any one of the six built-in waveforms can be chosen in both hardware mode and host mode. In hardware mode, setting pins TS[2:0] can select the required waveform template for all the transmitters, as shown in Table-9. In host mode, the waveform template can be configured on a per-channel basis. Bits TSIA[2:0] in register TSIA are used to select the channel and bits TS[2:0] in register TS are used to select the required waveform template. 0.60 0.40 0.20 0.00 The built-in waveform shaper uses an internal high frequency clock which is 16XMCLK as the clock reference. This function will be bypassed when MCLK is unavailable. Functional Description 250 -0.20 -300 -200 -100 0 Time (ns) 100 200 300 Figure-11 CEPT Waveform Template 17 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-9 Built-in Waveform Template Selection TS2 TS1 TS0 Service Clock Rate Cable Length Maximum Cable Loss (dB)(1) 0 0 0 E1 2.048 MHz 120 Ω/75 Ω Cable - 0 0 0 1 1 1 1 0 1 1 0 0 1 1 1 0 1 0 1 0 1 Reserved T1 0-133 ft. ABAM 133-266 ft. ABAM 266-399 ft. ABAM 399-533 ft. ABAM 533-655 ft. ABAM 1.544 MHz 1. Maximum cable loss at 772 kHz. through the jitter attenuator in the corresponding transmit or receive path. The constant delay feature is crucial for the applications requiring “hitless” switching. 2.5.2 BIPOLAR VIOLATION INSERTION When configured in Single Rail Mode 2 with AMI line code enabled, pin TDNn/BPVIn is used as BPVI input. A low-to-high transition on this pin inserts a bipolar violation on the next available mark in the transmit data stream. Sampling occurs on the falling edges of TCLK. But in TAOS (Transmit All Ones) with Analog Loopback, Remote Loopback and Inband Loopback, the BPVI is disabled. In TAOS with Digital Loopback, the BPVI is looped back to the system side, so the data to be transmitted on TTINGn and TRINGn are all ones with no bipolar violation. 2.6 0.6 1.2 1.8 2.4 3.0 Table-10 Gap Width Limitation FIFO Length 64 bit 32 bit Max. Gap Width 56 UI 28 UI In host mode, bit JABW in GCF determines the jitter attenuator 3 dB corner frequency (fc) for both T1 and E1. In hardware mode, the fc is fixed to 2.5 Hz for T1 or 1.7 Hz for E1. Generally, the lower the fc is, the higher the attenuation. However, lower fc comes at the expense of increased acquisition time. Therefore, the optimum fc is to optimize both the attenuation and the acquisition time. In addition, the longer FIFO length results in an increased throughput delay and also influences the 3 dB corner frequency. Generally, it’s recommended to use the lower corner frequency and the shortest FIFO length that can still meet jitter attenuation requirements. JITTER ATTENUATOR The jitter attenuator can be selected to work either in transmit path or in receive path or not used. The selection is accomplished by setting pin JAS in hardware mode or configuring bits JACF[1:0] in register GCF in host mode which affects all four channels. For applications which require line synchronization, the line clock needed to be extracted for the internal synchronization, the jitter attenuator is set in the receive path. Another use of the jitter attenuator is to provide clock smoothing in the transmit path for applications such as synchronous/asynchronous demultiplexing applications. In these applications, TCLK will have an instantaneous frequency that is higher than the nominal T1/E1 data rate and in order to set the average long-term TCLK frequency within the transmit line rate specifications, periods of TCLK are suppressed (gapped). Table-11 Output Jitter Specification T1 AT&T Pub 62411 GR-253-CODE TR-TSY-000009 The jitter attenuator integrates a FIFO which can accommodate a gapped TCLK. In host mode, the FIFO length can be 32 X 2 or 64 X 2 bits by programming bit JADP in GCF. In hardware mode, it is fixed to 64 X 2 bits. The FIFO length determines the maximum permissible gap width (see Table-10 Gap Width Limitation). Exceeding these values will cause FIFO overflow or underflow. The data is 16 or 32 bits’ delay 2.7 E1 ITU-T G.736 ITU-T G.742 ITU-T G.783 ETSI CTR 12/13 LINE INTERFACE CIRCUITRY The transmit and receive interface RTIPn/RRINGn and TTIPn/ TRINGn connections provide a matched interface to the cable. Figure12 shows the appropriate external components to connect with the cable for one transmit/receive channel. Table-12 summarizes the component values based on the specific application. Table-12 External Components Values Component RT RR Cp D1 - D4 T1(1) 75 Ω Coax 120 Ω Twisted Pair 100 Ω Twisted Pair, VDDT = 5.0 V 9.5 Ω ± 1% 9.5 Ω ± 1% 9.1 Ω ± 1% 9.31 Ω ± 1% 15 Ω ± 1% 12.4 Ω ± 1% 2200 pF 1000 pF Nihon Inter Electronics - EP05Q03L, 11EQS03L, EC10QS04, EC10QS03L; Motorola - MBR0540T1 E1 1. For T1 applications, only 5 V VDDT is supported. Functional Description 18 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 1 2:1 • • 0.22 µF RX Line B 1 kΩ One of Four Identical Channels RTIPn RR • • 1 2:1 • • RR 1 kΩ RT VDDT D4 D3 TX Line Cp RRINGn · TTIPn 2 VDDT D2 RT D1 IDT82V2044 • A VDDT • VDDDn 0.1 µF · TRINGn GNDTn 68 µF3 • NOTE: 1. Pulse T1124 transformer is recommended to be used in Standard (STD) operating temperature range (0°C to 70°C), while Pulse T1114 transformer is recommended to be used in Extended (EXT) operating temperature range is -40°C to +85°C. See Transformer Specifications Table for details. 2. Typical value. Adjust for actual board parasitics to obtain optimum return loss. 3. Common decoupling capacitor for all VDDT and GNDT pins. One per chip. 4. The RR and RT values are listed in Table-12. Figure-12 External Transmit/Receive Line Circuitry 2.8 TRANSMIT DRIVER POWER SUPPLY In T1 mode, only 5.0 V can be selected. 100 Ω lines are driven through a pair of 9.1 Ω series resistors and a 1:2 transformer. To optimize the power consumption of the device, series resistors are removed in this case. All transmit driver power supplies must be 5.0 V or 3.3 V. In E1 mode, despite the power supply voltage, the 75 Ω/120 Ω lines are driven through a pair of 9.5 Ω series resistors and a 1:2 transformer. For T1 applications, only 5.0 V operation is supported. However, in harsh cable environment, series resistors are required to improve the transmit return loss performance and protect the device from surges coupling into the device. Table-13 Transformer Specifications(1) Part No. STD Temp. EXT Temp. T1124 T1114 1. Turns Ratio (Pri: sec ± 2%) Transmit Receive 1:2CT 1CT:2 Electrical Specification @ 25°C OCL @ 25°C (mH MIN) LL (µH MAX) Transmit Receive Transmit Receive 1.2 1.2 .6 .6 CW/W (pF MAX) Transmit Receive 35 35 Package/Schematic TOU/3 Pulse T1124 transformer is recommended to be used in Standard (STD) operating temperature range (0°C to 70°C), while Pulse T1114 transformer is recommended to be used in Extended (EXT) operating temperature range is -40°C to +85°C. 2.9 POWER DRIVER FAILURE MONITOR 2.10 TRANSMIT LINE SIDE SHORT CIRCUIT FAILURE DETECTION An internal power Driver Failure Monitor (DFMON), parallel connected with TTIPn and TRINGn, can detect short circuit failure between TTIPn and TRINGn pins. Bit SCPB in register GCF decides whether the output driver short circuit protection is enabled. When the short circuit protection is enabled, the driver output current is limited to a typical value: 180 mAp. Also, register DF, DFI and DFM will be available. When DFMON will detect a short circuit, register DF will be set. With a short circuit failure detected, register DFI will be set and an interrupt will be generated on pin INT. In E1 or T1 with 5 V VDDT, a pair of 9.5 Ω serial resistors connect with TTIPn and TRINGn pins and limit the output current. In this case, the output current is a limited value which is always lower than the typical line short circuit current 180 mAp, even if the transmit line side is shorted. Refer to Table-12 External Components Values for details. 2.11 LINE PROTECTION In transmit side, the Schottky diodes D1~D4 are required to protect the line driver and improve the design robustness. In receive side, the series resistors of 1 kΩ are used to protect the receiver against current Functional Description 19 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT transmitted are still output on TTIPn and TRINGn while the data received on RTIPn and RRINGn are ignored. The LOS Detector (See 2.4.4 Loss of Signal (LOS) Detection for details) is still in use and monitors the internal looped back data. If a LOS condition on TDPn/TDNn is expected during Analog Loopback, ATAO should be disabled (default). Figure-14 shows the process. surges coupled in the device. The series resistors do not affect the receiver sensitivity, since the receiver impedance is as high as 120 kΩ typically. 2.12 HITLESS PROTECTION SWITCHING (HPS) The IDT82V2044 transceivers include an output driver with high-Z feature for T1/E1 redundancy applications. This feature reduces the cost of redundancy protection by eliminating external relays. Details of HPS are described in relative Application Note. The TTIPn and RTIPn, TRINGn and RRINGn cannot be connected directly to do the external analog loopback test. Line impedance loading is required to conduct the external analog loopback test. 2.13 LOOPBACK MODE 2.13.3 REMOTE LOOPBACK By programming the bits of register RLB or pulling pin LPn low, each channel of the device can be configured in Remote Loopback. In this configuration, the data and clock recovered by the clock and data recovery circuits are looped to waveform shaper and output on TTIPn and TRINGn. The jitter attenuator is also included in loopback when enabled in the transmit or receive path. The received data and clock are still output on RCLKn, RDn/RDPn and CVn/RDNn while the data to be transmitted on TCLKn, TDn/TDPn and BPVIn/TDNn are ignored. The LOs Detector is still in use. Figure-15 shows the process. The device provides five different diagnostic loopback configurations: Digital Loopback, Analog Loopback, Remote Loopback, Dual Loopback and Inband Loopback. In host mode, these functions are implemented by programming the registers DLB, ALB, RLB and Inband Loopback register group respectively. In hardware mode, only Analog Loopback and Remote Loopback can be selected by pin LPn. 2.13.1 DIGITAL LOOPBACK By programming the bits of register DLB, each channel of the device can be set in Local Digital Loopback. In this configuration, the data and clock to be transmitted, after passing the encoder, are looped back to Jitter Attenuator (if enabled) and decoder in the receive path, then output on RCLKn, RDn/RDPn and CVn/RDNn. The data to be transmitted are still output on TTIPn and TRINGn while the data received on RTIPn and RRINGn are ignored. The Loss Detector is still in use. Figure-13 shows the process. 2.13.4 DUAL LOOPBACK Dual Loopback mode is set by setting bit DLBn in register DLB and bit RLBn in register RLB to ‘1’. In this configuration, after passing the encoder, the data and clock to be transmitted are looped back to decoder directly and output on RCLKn, RDn/RDPn and CVn/RDNn. The recovered data from RTIPn and RRINGn are looped back to waveform shaper through JA (if selected) and output on TTIPn and TRINGn. The LOS Detector is still in use. Figure-16 shows the process. During Digital Loopback, the received signal on the receive line is still monitored by the LOS Detector (See 2.4.4 Loss of Signal (LOS) Detection for details). In case of a LOS condition and AIS insertion enabled, all ones signal will be output on RDPn/RDNn. With ATAO enabled, all ones signal will be also output on TTIPn/TRINGn. AIS insertion can be enabled by setting AISE bit in register GCF and ATAO can be enabled by setting register ATAO (default disabled). 2.13.5 TRANSMIT ALL ONES (TAOS) In hardware mode, the TAOS mode is set by pulling pin TCLKn high for more than 16 MCLK cycles. In host mode, TAOS mode is set by programming register TAO. In addition, automatic TAOS signals are inserted by setting register ATAO when Loss of Signal occurs. Note that the TAOS generator adopts MCLK as a timing reference. In order to assure that the output frequency is within specified limits, MCLK must have the applicable stability. 2.13.2 ANALOG LOOPBACK By programming the bits of register ALB or pulling pin LPn high, each channel of the device can be configured in Analog Loopback. In this configuration, the data to be transmitted output from the line driver are internally looped back to the slicer and peak detector in the receive path and output on RCLKn, RDn/RDPn and CVn/RDNn. The data to be Functional Description The TAOS mode, the TAOS mode with Digital Loopback and the TAOS mode with Analog Loopback are shown in Figure-17, Figure-18 and Figure-19. 20 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT One of Four Identical Channels LOS Detector CLK&Data Recovery (DPLL) RTIPn Slicer RRINGn Line Driver TRINGn Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDn/RDPn CVn/RDNn Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Digital Loopback Peak Detector TTIPn LOSn Waveform Shaper Transmit All Ones Figure-13 Digital Loopback LOS Detector RTIPn LOSn CLK&Data Recovery (DPLL) Slicer RRINGn Analog Loopback One of Four Identical Channels Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDn/RDPn CVn/RDNn B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Peak Detector TTIPn Line Driver TRINGn Jitter Attenuator Waveform Shaper Transmit All Ones Figure-14 Analog Loopback One of Four Identical Channels LOS Detector RTIPn Slicer RRINGn LOSn CLK&Data Recovery (DPLL) TRINGn Line Driver Waveform Shaper Jitter Attenuator RCLKn RDn/RDPn CVn/RDNn IBLC Detector Remote/ Inband Loopback Peak Detector TTIPn B8ZS/ HDB3/AMI Decoder Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn IBLC Generator Transmit All Ones Figure-15 Remote Loopback Functional Description 21 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT LOS Detector RTIPn Slicer RRINGn CLK&Data Recovery (DPLL) One of Four Identical Channels LOSn Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDn/RDPn CVn/RDNn B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Peak Detector TTIPn Line Driver TRINGn Jitter Attenuator Waveform Shaper Transmit All Ones Figure-16 Dual Loopback LOS Detector RTIPn Slicer RRINGn CLK&Data Recovery (DPLL) One of Four Identical Channels LOSn B8ZS/ HDB3/AMI Decoder Jitter Attenuator RCLKn RDn/RDPn CVn/RDNn Peak Detector TTIPn Line Driver TRINGn Waveform Shaper Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Transmit All Ones Figure-17 TAOS Data Path LOS Detector RTIPn Slicer RRINGn CLK&Data Recovery (DPLL) One of Four Identical Channels LOSn Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDn/RDPn CVn/RDNn Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Peak Detector TTIPn TRINGn Line Driver Waveform Shaper Transmit All Ones Figure-18 TAOS with Digital Loopback Functional Description 22 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT One of Four Identical Channels LOS Detector RTIPn Slicer RRINGn LOSn CLK&Data Recovery (DPLL) Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDn/RDPn CVn/RDNn Peak Detector TTIPn TRINGn Line Driver Waveform Shaper B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Transmit All Ones Figure-19 TAOS with Analog Loopback are configured properly. The required sequence for configuring the Inband Loopback Generator is: First, set registers e-LBAC and e-LBDC, followed by register e-LBCF. Then, to select the Inband Loopback generator set registers e-LBGS and then e-LBGE. 2.13.6 INBAND LOOPBACK Inband Loopback is a function that facilitates the system remote diagnosis. When this function is enabled, the chip will detect or generate the Inband Loopback Code. There are two kinds of Inband Loopback Code: Activate Code and Deactivate Code. If the Activate Code is received from the far end in a continuous 5.1 second, the chip will automatically go into Remote Loopback Mode (shown in Figure-15). If the Deactivate Code is received from the far end in a continuous 5.1 second, the chip quits from the Remote Loopback mode. The chip can send the Activate Code and Deactivate Code to the far end. Two function blocks: IBLC Detector (Inband Loopback Code Detector) and IBLC Generator (Inband Loopback Code Generator), realize the Inband Loopback. The Inband Loopback Detection and the Inband Loopback Generation can not be used simultaneously. Example: 5-bit Loop-up/Loop-down Detection (w/o interrupts): (see note in register description for e-LBAC) Loop-up code: 11000 Loop-down code: 11100 Set (in this order) e-LBAC (0x09) = 0xC6 (11000110) e-LBDC (0x0A) = 0xE7 (11100111) e-LBCF (0x08) = 0x30 Example: 5-bit Loop-up/Loop-down Activation on Channel 1 (w/o interrupts): The detection of Inband Loopback Code is enabled by bit LBDE in register e-LBCF. If bit ALBE in register e-LBCF is set to ‘1’, the chip will automatically go into or quit from the Remote Loopback mode based on the receipt of Inband Loopback Code. The length of the Activate Code is defined in bits LBAL[1:0] in register e-LBCF; and the length of the Deactivate Code is defined in bits LBDL[1:0] in register e-LBCF. The pattern of the Activate Code is defined in register e-LBAC, and the pattern of the Deactivate Code is defined in register e-LBDC. The above settings are globally effective for all the four channels. The presence of Inband Loopback Code in each channel is reflected timely in register e-LBS. Any transition of each bit in register e-LBS will be reflected in register eLBI, and if enabled in register e-LBM, will generate an interrupt. The required sequence of programming the Inband Loopback Code detection is: First, set registers e-LBAC and e-LBDC, followed by register eLBM. Finally, to activate Inband Loopback detection, set register eLBCF. Loop-up code: 11000 Loop-down code: 11100 Set (in this order) e-LBAC (0x09) = 0xC6 (11000110) e-LBDC (0x0A) = 0xE7 (11100111) e-LBCF (0x08) = 0x00 e-LBGS (0x0E) = 0x00 e-LBGE (0x0F) = 0x02 2.14 G.772 MONITORING The four channels of IDT82V2044 can all be configured to work as regular transceivers. In applications using only three channels (channels 1 to 3), channel 0 is configured to non-intrusively monitor any of the other channels’ inputs or outputs on the line side. The monitoring is nonintrusive per ITU-T G.772. Figure-20 shows the Monitoring Principle. The receive path or transmit path to be monitored is configured by pins MC[3:0] in hardware mode or by register PMON in host mode. The Inband Loopback Code Generator use the same registers as the Inband Loopback Detector to define the length and pattern of Activate Code and Deactivate Code. The length and pattern of the generated Activate Code and Deactivate Code can be different from the detected Activate Code and Deactivate Code. Register e-LBGS determines sending Activate Code or Deactivate Code, and register e-LBGE acts as a switch to start or stop the sending of Inband Loopback Code to the selected channels. Before sending Inband Loopback Code, users should be sure that registers e-LBCF, e-LBAC, e-LBDC and e-LBSG Functional Description The monitored signal goes through the clock and data recovery circuit of channel 0. The monitored clock can output on RCLK0 which can be used as a timing interfaces derived from E1 signal. The moni- 23 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT tored data can be observed digitally at the output pins RCLK0, RD0/ RDP0 and RDN0. LOS detector is still in use in channel 0 for the monitored signal. In monitoring mode, channel 0 can be configured in Remote Loopback. The signal which is being monitored will output on TTIP0 and TRING0. The output signal can then be connected to a standard test equipment with an E1 electrical interface for non-intrusive monitoring. Channel N ( 3 > N > 1 ) LOS Detector RTIPn Slicer RRINGn LOSn CLK&Data Recovery (DPLL) Jitter Attenuator B8ZS/ HDB3/AMI Decoder RCLKn RDn/RDPn CVn/RDNn Waveform Shaper Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLKn TDn/TDPn BPVIn/TDNn Peak Detector TTIPn Line Driver TRINGn Transmit All Ones Channel 0 G.772 Monitor LOS Detector RTIP0 Slicer RRING0 CLK&Data Recovery (DPLL) LOS0 Jitter Attenuator TRING0 Line Driver RCLK0 RD0/RDP0 CV0/RDN0 Remote Loopback Peak Detector TTIP0 B8ZS/ HDB3/AMI Decoder Waveform Shaper Jitter Attenuator B8ZS/ HDB3/AMI Encoder TCLK0 TD0/TDP0 BPVI0/TDN0 Transmit All Ones Figure-20 Monitoring Principle 2.15 SOFTWARE RESET 2.17 POWER DOWN Writing register RS will cause software reset by initiating about 1 µs reset cycle. This operation set all the registers to their default value. 2.16 POWER ON RESET Each transmit channel will be powered down by pulling pin TCLKn low for more than 64 MCLK cycles (if MCLK is available) or about 30 µs (if MCLK is not available). In host mode, each transmit channel will also be powered down by setting bit TPDNn in register e-TPDN to ‘1’. During power up, an internal reset signal sets all the registers to default values. The power-on reset takes at least 10 µs, starting from when the power supply exceeds 2/3 VDDA. All the receivers will be powered down when MCLK is low. When MCLK is clocked or high, setting bit RPDNn in register e-RPDN to ‘1’ will configure the corresponding receiver to be powered down. Functional Description 24 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 2.18 INTERFACE WITH 5 V LOGIC 2.19.1 PARALLEL HOST INTERFACE The interface is compatible with Motorola and Intel host. Pins MODE1 and MODE0 are used to select the operating mode of the parallel host interface. When pin MODE1 is pulled low, the host uses separate address bus and data bus. When high, multiplexed address/ data bus is used. When pin MODE0 is pulled low, the parallel host interface is configured for Motorola compatible hosts. When pin MODE0 is pulled high, the parallel host interface is configured for Intel compatible hosts. See Table-1 Pin Description for more details. The host interface pins in each operation mode is tabulated in Table-14: The IDT82V2044 can interface directly with 5 V TTL family devices. The internal input pads are tolerant to 5 V output from TTL and CMOS family devices. 2.19 HOST INTERFACE The host interface provides access to read and write the registers in the device. The interface consists of serial host interface and parallel host interface. By pulling pin MODE2 to VDDIO/2 or high, the device can be set to work in serial mode and in parallel mode respectively. Table-14 Parallel Host Interface Pins MODE[2:0] 100 101 110 111 Host Interface Non-multiplexed Motorola interface Non-multiplexed Intel interface Multiplexed Motorola interface Multiplexed Intel interface Generic Control, Data and Output Pin CS, ACK, DS, R/W, AS, A[4:0], D[7:0], INT CS, RDY, WR, RD, ALE, A[4:0], D[7:0], INT CS, ACK, DS, R/W, AS, AD[7:0], INT CS, RDY, WR, RD, ALE, AD[7:0], INT CS SCLK SDI 2 2 1 R/W A1 A2 A3 A4 A5 A6 A7 D0 D1 D2 D3 D4 D5 D6 D7 Address/Command Byte Input Data Byte D0 D1 D2 D3 D4 D5 D6 D7 SDO High Impedance Driven while R/W=1 1. While R/W=1, read from IDT82V2044; While R/W=0, write to IDT82V2044. 2. Ignored. Figure-21 Serial Host Mode Timing 2.19.2 SERIAL HOST INTERFACE By pulling pin MODE2 to VDDIO/2, the device operates in the serial host Mode. In this mode, the registers are accessible through a 16-bit word which contains an 8-bit command/address byte (bit R/W and 5address-bit A1~A5, A6 and A7 bits are ignored) and a subsequent 8-bit data byte (D7~D0), as shown in Figure-21. When bit R/W is set to ‘1’, data is read out from pin SDO. When bit R/W is set to ‘0’, data on pin SDI is written into the register whose address is indicated by address bits A5~A1. Functional Description 25 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 2.20 INTERRUPT HANDLING 2.20.2 INTERRUPT ENABLE The IDT82V2044 provides a latched interrupt output (INT) and the four kinds of interrupts are all reported by this pin. When the Interrupt Mask register (LOSM, DFM, AISM and e-LBM) is set to ‘1’, the Interrupt Status register (LOSI, DFI, AISI and e-LBI) is enabled respectively. Whenever there is a transition (‘0’ to ‘1’ or ‘1’ to ‘0’) in the corresponding status register, the Interrupt Status register will change into ‘1’, which means an interrupt occurs, and there will be a high to low transition on INT pin. An external pull-up resistor of approximately 10 kΩ is required to support the wire-OR operation of INT. When any of the four Interrupt Mask registers is set to ‘0’ (the power-on default value is ‘0’), the corresponding Interrupt Status register is disabled and the transition on status register is ignored. 2.20.1 INTERRUPT SOURCES There are four kinds of interrupt sources: 1. Status change in register LOS. The analog/digital loss of signal detector continuously monitors the received signal to update the specific bit in register LOS which indicates presence or absence of a LOS condition. 2. Status change in register DF. The automatic power driver circuit continuously monitors the output drivers signal to update the specific bit in register DFM which indicates presence or absence of an output driver short circuit condition. 3. Status change in register AIS. The AIS detector monitors the received signal to update the specific bit in register AIS which indicates presence or absence of a AIS condition. 4. Status change in register e-LBS. The IBLC detector monitors the inband loopback activation or deactivation code in received signal to update the specific bit in register e-LBS which indicates presence or absence of an inband loopback condition. 2.20.3 INTERRUPT CLEARING When an interrupt occurs, the Interrupt Status registers: LOSI, DFI, AISI and e-LBI, are read to identify the interrupt source. These registers will be cleared to ‘0’ after the corresponding status registers: LOS, DF, AIS and e-LBS are read. The Status registers will be cleared once the corresponding conditions are met. Pin INT is pulled high when there is no pending interrupt left. The interrupt handling in the interrupt service routine is showed in Figure-22. Interrupt Allowed No Interrupt Condition Exist? Yes Read Interrupt Status Register Read Corresponding Status Register Service the Interrupt Figure-22 Interrupt Service Routine Functional Description 26 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 3 PROGRAMMING INFORMATION The Register ADDP, addressed as 11111 or 1F Hex, switches between primary registers bank and expanded registers bank. 3.1 REGISTER LIST AND MAP By setting the register ADDP to ‘AAH’, the 5 address bits point to the expanded register bank, that is, the expanded registers are available. By clearing the register ADDP, the primary registers are available. There are 23 primary registers (including an Address Pointer Control Register and 16 expanded registers in the device). 3.2 Whatever the control interface is, 5 address bits are used to set the registers. In non-multiplexed parallel interface mode, the five dedicated address bits are A[4:0]. In multiplexed parallel interface mode, AD[4:0] carries the address information. In serial interface mode, A[5:1] are used to address the register. RESERVED AND TEST REGISTERS Primary Registers, whose address are 16H to 1EH, are reserved. Expanded registers, whose address are 10H to 1EH, are used for test and must be set to ‘0’. When writing to registers with reserved bit locations, the default state must be written to the reserved bits to ensure proper device operation. Table-15 Primary Register List Address Hex 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E Serial Interface A7-A1 XX00000 XX00001 XX00010 XX00011 XX00100 XX00101 XX00110 XX00111 XX01000 XX01001 XX01010 XX01011 XX01100 XX01101 XX01110 XX01111 XX10000 XX10001 XX10010 XX10011 XX10100 XX10101 XX10110 XX10111 XX11000 XX11001 XX11010 XX11011 XX11100 XX11101 XX11110 Parallel Interface A7-A0 XXX00000 XXX00001 XXX00010 XXX00011 XXX00100 XXX00101 XXX00110 XXX00111 XXX01000 XXX01001 XXX01010 XXX01011 XXX01100 XXX01101 XXX01110 XXX01111 XXX10000 XXX10001 XXX10010 XXX10011 XXX10100 XXX10101 XXX10110 XXX10111 XXX11000 XXX11001 XXX11010 XXX11011 XXX11100 XXX11101 XXX11110 1F XX11111 XXX11111 Programming Information Register R/W ID ALB RLB TAO LOS DF LOSM DFM LOSI DFI RS PMON DLB LAC ATAO GCF TSIA TS OE AIS AISM AISI R R/W R/W R/W R R R/W R/W R R W R/W R/W R/W R/W R/W R/W R/W R/W R R/W R Explanation Device ID Register Analog Loopback Configuration Register Remote Loopback Configuration Register Transmit All Ones Configuration Register Loss of Signal Status Register Driver Fault Status Register LOS Interrupt Mask Register Driver Fault Interrupt Mask Register LOS Interrupt Status Register Driver Fault Interrupt Status Register Software Reset Register Performance Monitor Configuration Register Digital Loopback Configuration Register LOS/AIS Criteria Configuration Register Automatic TAOS Configuration Register Global Configuration Register Indirect Address Register for Transmit Template Select Transmit Template Select Register Output Enable Configuration Register AIS Status Register AIS Interrupt Mask Register AIS Interrupt Status Register Reserved ADDP R/W Address pointer control Register for switching between primary register bank and expanded register bank 27 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-16 Expanded (Indirect Address Mode) Register List Address Register R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R R/W R R/W R/W Explanation Hex Serial Interface A7-A1 Parallel Interface A7-A0 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E XX00000 XX00001 XX00010 XX00011 XX00100 XX00101 XX00110 XX00111 XX01000 XX01001 XX01010 XX01011 XX01100 XX01101 XX01110 XX01111 XX10000 XX10001 XX10010 XX10011 XX10100 XX10101 XX10110 XX10111 XX11000 XX11001 XX11010 XX11011 XX11100 XX11101 XX11110 XXX00000 XXX00001 XXX00010 XXX00011 XXX00100 XXX00101 XXX00110 XXX00111 XXX01000 XXX01001 XXX01010 XXX01011 XXX01100 XXX01101 XXX01110 XXX01111 XXX10000 XXX10001 XXX10010 XXX10011 XXX10100 XXX10101 XXX10110 XXX10111 XXX11000 XXX11001 XXX11010 XXX11011 XXX11100 XXX11101 XXX11110 e-SING e-CODE e-CRS e-RPDN e-TPDN e-CZER e-CODV e-EQUA e-LBCF e-LBAC e-LBDC e-LBS e-LBM e-LBI e-LBGS e-LBGE 1F XX11111 XXX11111 ADDP Programming Information Single Rail Mode Setting Register Encoder/Decoder Selection Register Clock Recovery Enable/Disable Register Receiver n Powerdown Enable/Disable Register Transmitter n Powerdown Enable/Disable Register Consecutive Zero Detect Enable/Disable Register Code Violation Detect Enable/Disable Register Enable Equalizer Enable/Disable Register Inband Loopback Configuration Register Inband Loopback Activation Code Register Inband Loopback Deactivation Code Register Inband Loopback Code Receive Status Register Inband Loopback Interrupt Mask Register Inband Loopback Interrupt Status Register Inband Loopback Activate/Deactivate Code Generator Selection Register Inband Loopback Activate/Deactivate Code Generator Enable Register Test R/W Address pointer control register for switching between primary register bank and expanded register bank 28 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-17 Primary Register Map Register Address R/W Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 ID 00H R Default ID 7 R 0 ID 6 R 0 ID 5 R 0 ID 4 R 1 ID 3 R 0 ID 2 R 0 ID 1 R 0 ID 0 R 0 ALB 01H R/W Default R/W 0 R/W 0 R/W 0 R/W 0 ALB 3 R/W 0 ALB 2 R/W 0 ALB 1 R/W 0 ALB 0 R/W 0 RLB 02H R/W Default R/W 0 R/W 0 R/W 0 R/W 0 RLB 3 R/W 0 RLB 2 R/W 0 RLB 1 R/W 0 RLB 0 R/W 0 TAO 03H R/W Default R/W 0 R/W 0 R/W 0 R/W 0 TAO 3 R/W 0 TAO 2 R/W 0 TAO 1 R/W 0 TAO 0 R/W 0 LOS 04H R Default R 0 R 0 R 0 R 0 LOS 3 R 0 LOS 2 R 0 LOS 1 R 0 LOS 0 R 0 DF 05H R Default R 0 R 0 R 0 R 0 DF 3 R 0 DF 2 R 0 DF 1 R 0 DF 0 R 0 LOSM 06H R/W Default R/W 0 R/W 0 R/W 0 R/W 0 LOSM 3 R/W 0 LOSM 2 R/W 0 LOSM 1 R/W 0 LOSM 0 R/W 0 DFM 07H R/W Default R/W 0 R/W 0 R/W 0 R/W 0 DFM 3 R/W 0 DFM 2 R/W 0 DFM 1 R/W 0 DFM 0 R/W 0 LOSI 08H R Default R 0 R 0 R 0 R 0 LOSI 3 R 0 LOSI 2 R 0 LOSI 1 R 0 LOSI 0 R 0 DFI 09H R Default R 0 R 0 R 0 R 0 DFI 3 R 0 DFI 2 R 0 DFI 1 R 0 DFI 0 R 0 RS 0AH W Default RS 7 W 1 RS 6 W 1 RS 5 W 1 RS 4 W 1 RS 3 W 1 RS 2 W 1 RS 1 W 1 RS 0 W 1 PMON 0BH R/W Default R/W 0 R/W 0 R/W 0 R/W 0 MC 3 R/W 0 MC 2 R/W 0 MC 1 R/W 0 MC 0 R/W 0 DLB 0CH R/W Default R/W 0 R/W 0 R/W 0 R/W 0 DLB 3 R/W 0 DLB 2 R/W 0 DLB 1 R/W 0 DLB 0 R/W 0 LAC 0DH R/W Default R/W 0 R/W 0 R/W 0 R/W 0 LAC 3 R/W 0 LAC 2 R/W 0 LAC 1 R/W 0 LAC 0 R/W 0 ATAO 0EH R/W Default R/W 0 R/W 0 R/W 0 R/W 0 ATAO 3 R/W 0 ATAO 2 R/W 0 ATAO 1 R/W 0 ATAO 0 R/W 0 GCF 0FH R/W Default R/W 0 AISE R/W 0 SCPB R/W 0 CODE R/W 0 JADP R/W 0 JABW R/W 0 JACF 1 R/W 0 JACF 0 R/W 0 Programming Information 29 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-17 Primary Register Map (Continued) Register Address R/W Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 TSIA 10 Hex R/W Default R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 TSIA 1 R/W 0 TSIA 0 R/W 0 TS 11 Hex R/W Default R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 TS 2 R/W 0 TS 1 R/W 0 TS 0 R/W 0 OE 12 Hex R/W Default R/W 0 R/W 0 R/W 0 R/W 0 OE 3 R/W 0 OE 2 R/W 0 OE 1 R/W 0 OE 0 R/W 0 AIS 13 Hex R Default R 0 R 0 R 0 R 0 AIS 3 R 0 AIS 2 R 0 AIS 1 R 0 AIS 0 R 0 AISM 14 Hex R/W Default R/W 0 R/W 0 R/W 0 R/W 0 AISM 3 R/W 0 AISM 2 R/W 0 AISM 1 R/W 0 AISM 0 R/W 0 AISI 15 Hex R Default R 0 R 0 R 0 R 0 AISI 3 R 0 AISI 2 R 0 AISI 1 R 0 AISI 0 R 0 ADDP 1F Hex R/W Default ADDP 7 R/W 0 ADDP 6 R/W 0 ADDP 5 R/W 0 ADDP 4 R/W 0 ADDP 3 R/W 0 ADDP 2 R/W 0 ADDP 1 R/W 0 ADDP 0 R/W 0 Programming Information 30 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-18 Expanded (Indirect Address Mode) Register Map Register e-SING e-CODE e-CRS e-RPDN e-TPDN e-CZER e-CODV e-EQUA e-LBCF e-LBAC e-LBDC e-LBS e-LBM e-LBI e-LBGS e-LBGE ADDP Address R/W Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 00H R/W Default 01H R/W Default 02H R/W Default 03H R/W Default 04H R/W Default 05H R/W Default 06H R/W Default 07H R/W Default 08H R/W Default 09H R/W Default 0AH R/W Default 0BH R Default 0CH R/W Default 0DH R/W Default 0EH R/W Default 0FH R/W Default 1FH R/W Default R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 LBAC 7 R/W 0 LBDC 7 R/W 0 R 0 R/W 0 R 0 R/W 0 R/W 0 ADDP 7 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 LBAC 6 R/W 0 LBDC 6 R/W 0 R 0 R/W 0 R 0 R/W 0 R/W 0 ADDP 6 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 LBDE R/W 0 LBAC 5 R/W 0 LBDC 5 R/W 0 R 0 R/W 0 R 0 R/W 0 R/W 0 ADDP 5 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 ALBE R/W 0 LBAC 4 R/W 0 LBDC 4 R/W 0 R 0 R/W 0 R 0 R/W 0 R/W 0 ADDP 4 R/W 0 SING 3 R/W 0 CODE 3 R/W 0 CRS 3 R/W 0 RPDN 3 R/W 0 TPDN 3 R/W 0 CZER 3 R/W 0 CODV 3 R/W 0 EQUA 3 R/W 0 LBAL 1 R/W 0 LBAC 3 R/W 0 LBDC 3 R/W 0 LBS 3 R 0 LBM 3 R/W 0 LBI 3 R 0 LBGS 3 R/W 0 LBGE 3 R/W 0 ADDP 3 R/W 0 SING 2 R/W 0 CODE 2 R/W 0 CRS 2 R/W 0 RPDN 2 R/W 0 TPDN 2 R/W 0 CZER 2 R/W 0 CODV 2 R/W 0 EQUA 2 R/W 0 LBAL 0 R/W 0 LBAC 2 R/W 0 LBDC 2 R/W 0 LBS 2 R 0 LBM 2 R/W 0 LBI 2 R 0 LBGS 2 R/W 0 LBGE 2 R/W 0 ADDP 2 R/W 0 SING 1 R/W 0 CODE 1 R/W 0 CRS 1 R/W 0 RPDN 1 R/W 0 TPDN 1 R/W 0 CZER 1 R/W 0 CODV 1 R/W 0 EQUA 1 R/W 0 LBDL 1 R/W 0 LBAC 1 R/W 0 LBDC 1 R/W 0 LBS 1 R 0 LBM 1 R/W 0 LBI 1 R 0 LBGS 1 R/W 0 LBGE 1 R/W 0 ADDP 1 R/W 0 SING 0 R/W 0 CODE 0 R/W 0 CRS 0 R/W 0 RPDN 0 R/W 0 TPDN 0 R/W 0 CZER 0 R/W 0 CODV 0 R/W 0 EQUA 0 R/W 0 LBDL 0 R/W 0 LBAC 0 R/W 0 LBDC 0 R/W 0 LBS 0 R 0 LBM 0 R/W 0 LBI 0 R 0 LBGS 0 R/W 0 LBGE 0 R/W 0 ADDP 0 R/W 0 Programming Information 31 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 3.3 REGISTER DESCRIPTION 3.3.1 PRIMARY REGISTERS ID: Device ID Register (R, Address = 00H) Symbol Position Default ID[7:0] ID.7-0 10H Description An 8-bit word is pre-set into the device as the identification and revision number. This number is different with the functional changes and is mask programmed. ALB: Analog Loopback Configuration Register (R/W, Address = 01H) Symbol Position Default - ALB.7-4 0000 ALB[3:0] ALB.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Analog Loopback enabled. RLB: Remote Loopback Configuration Register (R/W, Address = 02H) Symbol Position Default - RLB.7-4 0000 RLB[3:0] RLB.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Remote Loopback enabled. TAO: Transmit All Ones Configuration Register (R/W, Address = 03H) Symbol Position Default - TAO.7-4 0000 TAO[3:0] TAO.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Transmit all ones. LOS: Loss of Signal Status Register (R, Address = 04H) Symbol Position Default - LOS.7-4 0000 LOS[3:0] LOS.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Loss of signal detected. DF: Driver Fault Status Register (R, Address = 05H) Symbol Position Default - DF.7-4 0000 DF[3:0] DF.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Driver fault detected. LOSM: Loss of Signal Interrupt Mask Register (R/W, Address = 06H) Symbol Position Default - LOSM.7-4 0000 LOSM[3:0] LOSM.3-0 0000 Programming Information Description 0 = Normal operation. 1 = Reserved. 0 = LOS interrupt is not allowed. (Default) 1 = LOS interrupt is allowed. 32 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT DFM: Driver Fault Interrupt Mask Register (R/W, Address = 07H) Symbol Position Default - DFM.7-4 0000 DFM[3:0] DFM.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Driver fault interrupt not allowed. (Default) 1 = Driver fault interrupt allowed. LOSI: Loss of Signal Interrupt Status Register (R, Address = 08H) Symbol Position Default - LOSI.7-4 0000 LOSI[3:0] LOSI.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = (Default). Or after a LOS read operation. 1 = Any transition on LOSn (Corresponding LOSMn is set to ‘1’). DFI: Driver Fault Interrupt Status Register (R, Address = 09H) Symbol Position Default - DFI.7-4 0000 DFI[3:0] DFI.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = (Default). Or after a DF read operation. 1 = Any transition on DFn (Corresponding DFMn is set to ‘1’). RS: Software Reset Register (W, Address = 0AH) Symbol Position Default RS[7:0] RS.7-0 FFH Description Writing to this register will not change the content in this register but initiate a 1 µs reset cycle, which means all the registers in the device are set to their default values. PMON: Performance Monitor Configuration Register (R/W, Address = 0BH) Symbol Position Default - PMON.7-4 0000 MC[3:0] PMON.3-0 0000 Description 0 = Normal operation. (Default) 1 = Reserved. 0000 = Normal operation without monitoring (Default) 0001 = Monitor Receiver 1 0010 = Monitor Receiver 2 0011 = Monitor Receiver 3 0100-0111 = Reserved 1000 = Normal operation without monitoring 1001 = Monitor Transmitter 1 1010 = Monitor Transmitter 2 1011 = Monitor Transmitter 3 1100-1111 = Reserved DLB: Digital Loopback Configuration Register (R/W, Address = 0CH) Symbol Position Default - DLB.7-4 0000 DLB[3:0] DLB.3-0 0000 Programming Information Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Digital Loopback enabled. 33 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT LAC: LOS/AIS Criteria Configuration Register (R/W, Address = 0DH) Symbol Position Default - LAC.7-4 0000 LAC[3:0] LAC.3-0 0000 Description 0 = Normal operation. 1 = Reserved. For E1 mode, the criterion is selected as below: 0 = G.775 (Default) 1 = ETSI 300 233 For T1 mode, the criterion meets T1.231. ATAO: Automatic TAOS Configuration Register (R/W, Address = 0EH) Symbol Position Default - ATAO.7-4 0000 ATAO[3:0] ATAO.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = No automatic transmit all ones. (Default) 1 = Automatic transmit all ones to the line side during LOS. GCF: Global Configuration Register (R/W, Address = 0FH) Symbol Position Default - GCF.7 0 AISE GCF.6 0 SCPB GCF.5 0 CODE GCF.4 0 JADP GCF.3 0 JABW GCF.2 0 JACF[1:0] GCF.1-0 00 Description 0 = Normal operation. 1 = Reserved. 0 = AIS insertion to the system side disabled on LOS. 1 = AIS insertion to the system side enabled on LOS. 0 = Short circuit protection is enabled. 1 = Short circuit protection is disabled. 0 = B8ZS/HDB3 encoder/decoder enabled. 1 = AMI encoder/decoder enabled. Jitter Attenuator Depth Select 0 = 32-bit FIFO (Default) 1 = 64-bit FIFO Jitter Transfer Function Bandwidth Select 0 = 2.5 Hz (T1); 1.7 Hz (E1) (Default) 1 = 5 Hz; 6.5 Hz Jitter Attenuator Configuration 00 = JA not used. (Default) 01 = JA in transmit path 10 = JA not used. 11 = JA in receive path TSIA: Indirect Address Register for Transmit Template Select Registers (R/W, Address = 10H) Symbol Position - TSIA.7-2 TSIA[1:0] TSIA.1-0 Default Description 0 = Normal operation. (Default) 000000 1 = Reserved. 00 = Channel 0 (Default) 01 = Channel 1 00 10 = Channel 2 11 = Channel 3 Programming Information 34 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT TS: Transmit Template Select Register (R/W, Address = 11H) Symbol Position Default - TS.7-3 00000 TS[2-0] TS.2-0 000 Description 0 = Normal operation. (Default) 1 = Reserved. TS[2:0] select one of eight built-in transmit template for different applications. TS[2:0] 000 001 010 011 100 101 110 111 Mode E1 Cable Length 75 Ω coaxial cable/120 Ω twisted pair cable. Reserved. T1 T1 T1 T1 T1 0 - 133 ft. 133 - 266 ft. 266 - 399 ft. 399 - 533 ft. 533 - 655 ft. OE: Output Enable Configuration Register (R/W, Address = 12H) Symbol Position Default - OE.7-4 0000 OE[3:0] OE.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Transmit drivers enabled. (Default) 1 = Transmit drivers in high-Z state. AIS: Alarm Indication Signal Status Register (R, Address = 13H) Symbol Position Default - AIS.7-4 0000 AIS[3:0] AIS.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = AIS detected. AISM: Alarm Indication Signal Interrupt Mask Register (R/W, Address = 14H) Symbol Position Default - AISM.7-4 0000 AISM[3:0] AISM.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = AIS interrupt is not allowed. (Default) 1 = AIS interrupt is allowed. AISI: Alarm Indication Signal Interrupt Status Register (R, Address = 15H) Symbol Position Default - AISI.7-4 0000 AISI[3:0] AISI.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = (Default), or after an AIS read operation 1 = Any transition on AISn. (Corresponding AISMn is set to ‘1’.) ADDP: Address Pointer Control Register (R/W, Address = 1F H) Symbol Position Default ADDP[7:0] ADDP.7-0 00H Programming Information Description Two kinds of configuration in this register can be set to switch between primary register bank and expanded register bank. When power up, the address pointer will point to the top address of primary register bank automatically. 00H = The address pointer points to the top address of primary register bank (default). AAH = The address pointer points to the top address of expanded register bank. 35 September 22, 2005 IDT82V2044 3.3.2 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT EXPANDED REGISTER DESCRIPTION e-SING: Single Rail Mode Setting Register (R/W, Expanded Address = 00H) Symbol Position Default - SING.7-4 0000 SING[3:0] SING.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Pin TDNn selects single rail mode or dual rail mode. (Default) 1 = Single rail mode enabled (with CRSn=0) e-CODE: Encoder/Decoder Selection Register (R/W, Expanded Address = 01H) Symbol Position Default - CODE.7-4 0000 CODE[3:0] CODE.3-0 0000 Description 0 = Normal operation. 1 = Reserved. CODEn selects AMI or B8ZS/HDB3 encoder/decoder on a per channel basis with SINGn = 1 and CRSn = 0. 0 = B8ZS/HDB3 encoder/decoder enabled. (Default) 1 = AMI encoder/decoder enabled. e-CRS: Clock Recovery Enable/Disable Selection Register (R/W, Expanded Address = 02H) Symbol Position Default - CRS.7-4 0000 CRS[3:0] CRS.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Clock recovery enabled. (Default) 1 = Clock recovery disabled. e-RPDN: Receiver n Powerdown Register (R/W, Expanded Address = 03H) Symbol Position Default - RPDN.7-4 0000 RPDN[3:0] RPDN.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Receiver n is powered down. e-TPDN: Transmitter n Powerdown Register (R/W, Expanded Address = 04H) 1. Symbol Position Default - TPDN.7-4 0000 TPDN[3:0] TPDN.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Transmitter n is powered down(1) (the corresponding transmit output driver enters a low power high-Z mode). Transmitter n is powered down when either pin TCLKn is pulled low or TPDNn is set to ‘1’. e-CZER: Consecutive Zero Detect Enable/Disable Register (R/W, Expanded Address = 05H) Symbol Position Default - CZER.7-4 0000 CZER[3:0] CZER.3-0 0000 Programming Information Description 0 = Normal operation. 1 = Reserved. 0 = Excessive zeros detect disabled. (Default) 1 = Excessive zeros detect enabled for B8ZS/HDB3 decoder in single rail mode. 36 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT e-CODV: Code Violation Detect Enable/Disable Register (R/W, Expanded Address = 06H) Symbol Position Default - CODV.7-4 0000 CODV[3:0] CODV.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Code Violation Detect enable for B8ZS/HDB3 decoder in single rail mode. (Default) 1 = Code Violation Detect disabled. e-EQUA: Receive Equalizer Enable/Disable Register (R/W, Expanded Address = 07H) Symbol Position Default - EQUA.7-4 0000 EQUA[3:0] EQUA.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation. (Default) 1 = Equalizer in Receiver n is enabled, which can improve the receive performance when transmission length is more than 200 m. e-LBCF: Inband Loopback Configuration Register (1)(R/W, Expanded Address = 08H) Symbol Position Default - LBCF.7-6 00 LBDE LBCF.5 0 ALBE LBCF.4 0 LBAL[1:0] LBCF.3-2 00 LBDL[1:0] LBCF.1-0 00 Description 0 = Normal Operation. (Default) 1 = Reserved. Loopback Detector Enable 0 = Inband loopback code detection is disabled. (Default) 1 = Inband loopback code detection is enabled. Automatic Loopback Enable 0 = Automatic Inband Loopback disabled. 1 = Automatic Inband Loopback enabled. Loopback Activate Code Length 00 = 5-bit long activate code in LBAC[7:3] is effective. 01 = 6-bit long activate code in LBAC[7:2] is effective. 10 = 7-bit long activate code in LBAC[7:1] is effective. 11 = 8-bit long activate code in LBAC[7:0] is effective. Loopback Deactivate Code Length 00 = 5-bit long deactivate code in LBDC[7:3] is effective. 01 = 6-bit long deactivate code in LBDC[7:2] is effective. 10 = 7-bit long deactivate code in LBDC[7:1] is effective. 11 = 8-bit long deactivate code in LBDC[7:0] is effective. 1. This register is global control. e-LBAC: Inband Loopback Activation Code Register(1)(2)(R/W, Expanded Address = 09H) Symbol LBAC[7:0] 1. Position LBAC.7-0 Default 00H Description LBAC[7:0] = 8-bit (or 4-bit) repeating activate code is programmed with the length limitation in LBAL[1:0]. LBAC[7:1] = 7-bit repeating activate code is programmed with the length limitation in LBAL[1:0]. LBAC[7:2] = 6-bit (or 3-bit) repeating activate code is programmed with the length limitation in LBAL[1:0]. LBAC[7:3] = 5-bit repeating activate code is programmed with the length limitation in LBAL[1:0]. When setting a value in e-LBAC or e-LBDC that is less than 8 bits, the most significant bits must be replicated in the unused least significant bits. e.g. if setting a 5-bit code = 11000, the register value should be 11000110. Here b7 is repeated in b2; b6 is repeated in b1; b5 is repeated in b0. 2. This register is global control. Programming Information 37 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT e-LBDC: Inband Loopback Deactivation Code Register(1)(2)(R/W, Expanded Address = 0AH) Symbol LBDC[7:0] Position LBDC.7-0 Default 00H Description LBDC[7:0] = 8-bit (or 4-bit) repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits. LBDC[7:1] = 7-bit repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits. LBDC[7:2] = 6-bit (or 3-bit) repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits. LBDC[7:3] = 5-bit repeating deactivate code is programmed with the length limitation set by LBDL[1:0] bits. 1. When setting a value in e-LBAC or e-LBDC that is less than 8 bits, the most significant bits must be replicated in the unused least significant bits. e.g. if setting a 5-bit code = 11000, the register value should be 11000110. Here b7 is repeated in b2; b6 is repeated in b1; b5 is repeated in b0. 2. This register is global control. e-LBS: Inband Loopback Receive Status Register (R, Expanded Address = 0BH) Symbol Position Default - LBS.7-4 0000 LBS[3:0] LBS.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Normal operation (Default). Or loopback deactivation code detected. 1 = Loopback activation code detected. e-LBM: Inband Loopback Interrupt Mask Register (R/W, Expanded Address = 0CH) Symbol Position Default - LBM.7-4 0000 LBM[3:0] LBM.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = LBI interrupt is not allowed (Default) 1 = LBI interrupt is allowed. e-LBI: Inband Loopback Interrupt Status Register (R, Expanded Address = 0DH) Symbol Position Default - LBI.7-4 0000 LBI[3:0] LBI.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = (Default). Or after a read of e-LBS operation. 1 = Any transition on e-LBSn. (Corresponding e-LBMn and bit LBDE in e-LBCF are both set to ‘1’.) e-LBGS: Inband Loopback Activate/Deactivate Code Generator Selection Register (R/W, Expanded Address = 0EH) Symbol Position Default - LBGS.7-4 0000 LBGS[3:0] LBGS.3-0 0000 Description 0 = Normal operation. 1 = Reserved. 0 = Activate Code Generator is selected in Transmitter n. (Default) 1 = Deactivate Code Generator is selected in Transmitter n. e-LBGE: Inband Loopback Activate/Deactivate Code Generator Enable Register (R/W, Expanded Address = 0FH) Symbol Position Default - LBGE.7-4 0000 LBGE[3:0] LBGE.3-0 0000 Programming Information Description 0 = Normal operation. 1 = Reserved. 0 = Activate/Deactivate Code Generator for inband loopback is disabled in Transmitter n. (Default) 1 = Activate/Deactivate Code Generator for inband loopback is enabled in Transmitter n. 38 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT 4 IEEE STD 1149.1 JTAG TEST ACCESS PORT The JTAG boundary scan registers includes BSR (Boundary Scan Register), IDR (Device Identification Register), BR (Bypass Register) and IR (Instruction Register). These will be described in the following pages. Refer to Figure-23 for architecture. The IDT82V2044 supports the digital Boundary Scan Specification as described in the IEEE 1149.1 standards. 4.1 JTAG INSTRUCTIONS AND INSTRUCTION REGISTER (IR) The boundary scan architecture consists of data and instruction registers plus a Test Access Port (TAP) controller. Control of the TAP is achieved through signals applied to the TMS and TCK pins. Data is shifted into the registers via the TDI pin, and shifted out of the registers via the TDO pin. JTAG test data are clocked at a rate determined by JTAG test clock. Digital output pins The IR with instruction decode block is used to select the test to be executed or the data register to be accessed or both. The instructions are shifted in LSB first to this 3-bit register. See Table-19 Instruction Register Description on page 40 for details of the codes and the instructions related. Digital input pins parallel latched output BSR (Boundary Scan Register) MUX IDR (Device Identification Register) TDI MUX BR (Bypass Register) IR (Instruction Register) TDO Control TMS TRST TAP (Test Access Port) Controller Select High-Z Enable TCK Figure-23 JTAG Architecture IEEE STD 1149.1 JTAG Test Access Port 39 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-19 Instruction Register Description IR Code Instruction Comments Extest The external test instruction allows testing of the interconnection to other devices. When the current instruction is the EXTEST instruction, the boundary scan register is placed between TDI and TDO. The signal on the input pins can be sampled by loading the boundary scan register using the Capture-DR state. The sampled values can then be viewed by shifting the boundary scan register using the Shift-DR state. The signal on the output pins can be controlled by loading patterns shifted in through input TDI into the boundary scan register using the Update-DR state. 100 Sample/Preload The sample instruction samples all the device inputs and outputs. For this instruction, the boundary scan register is placed between TDI and TDO. The normal path between IDT82V2044 logic and the I/O pins is maintained. Primary device inputs and outputs can be sampled by loading the boundary scan register using the Capture-DR state. The sampled values can then be viewed by shifting the boundary scan register using the Shift-DR state. 110 Idcode The identification instruction is used to connect the identification register between TDI and TDO. The device's identification code can then be shifted out using the Shift-DR state. 111 Bypass The bypass instruction shifts data from input TDI to output TDO with one TCK clock period delay. The instruction is used to bypass the device. 000 4.2.2 Table-20 Device Identification Register Description 4.2 Bit No. Comments 0 Set to ‘1’ 1~11 Producer Number 12~27 Part Number 28~31 Device Revision BYPASS REGISTER (BR) The BR consists of a single bit. It can provide a serial path between the TDI input and TDO output, bypassing the BSR to reduce test access times. 4.2.3 BOUNDARY SCAN REGISTER (BSR) The BSR can apply and read test patterns in parallel to or from all the digital I/O pins. The BSR is a 98 bits long shift register and is initialized and read using the instruction EXTEST or SAMPLE/PRELOAD. Each pin is related to one or more bits in the BSR. Please refer to Table-21 for details of BSR bits and their functions. JTAG DATA REGISTER 4.2.1 DEVICE IDENTIFICATION REGISTER (IDR) The IDR can be set to define the producer number, part number and the device revision, which can be used to verify the proper version or revision number that has been used in the system under test. The IDR is 32 bits long and is partitioned as in Table-20. Data from the IDR is shifted out to TDO LSB first. Table-21 Boundary Scan Register Description Bit No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Bit Symbol POUT0 PIN0 POUT1 PIN1 POUT2 PIN2 POUT3 PIN3 POUT4 PIN4 POUT5 PIN5 POUT6 PIN6 POUT7 PIN7 Pin Signal AD0 AD0 AD1 AD1 AD2 AD2 AD3 AD3 AD4 AD4 AD5 AD5 AD6 AD6 AD7 AD7 Type I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O IEEE STD 1149.1 JTAG Test Access Port Comments 40 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-21 Boundary Scan Register Description (Continued) Bit No. Bit Symbol Pin Signal Type 16 PIOS N/A - 17 18 19 20 21 22 TCLK1 TDP1 TDN1 RCLK1 RDP1 RDN1 TCLK1 TDP1 TDN1 RCLK1 RDP1 RDN1 I I I O O O 23 HZEN1 N/A - 24 25 26 27 28 29 30 LOS1 TCLK0 TDP0 TDN0 RCLK0 RDP0 RDN0 LOS1 TCLK0 TDP0 TDN0 RCLK0 RDP0 RDN0 O I I I O O O 31 HZEN0 N/A - 32 33 34 35 36 LOS0 MODE1 LOS3 RDN3 RDP3 LOS0 MODE1 LOS3 RDN3 RDP3 O I O O O 37 HZEN3 N/A - 38 39 40 41 42 43 44 RCLK3 TDN3 TDP3 TCLK3 LOS2 RDN2 RDP2 RCLK3 TDN3 TDP3 TCLK3 LOS2 RDN2 RDP2 O I I I O O O 45 HZEN2 N/A - 46 47 48 49 50 51 RCLK2 TDN2 TDP2 TCLK2 INT ACK RCLK2 TDN2 TDP2 TCLK2 INT ACK O I I I O O 52 SDORDYS N/A - 53 54 55 56 WRB RDB ALE CSB DS R/W ALE CS I I I I IEEE STD 1149.1 JTAG Test Access Port Comments Controls pins AD[7:0]. When ‘0’, the pins are configured as outputs. The output values to the pins are set in POUT 7~0. When ‘1’, the pins are high-Z. The input values to the pins are read in PIN 7~0. Controls pin RDP1, RDN1 and RCLK1. When ‘0’, the outputs are enabled on the pins. When ‘1’, the pins are high-Z. Controls pin RDP0, RDN0 and RCLK0. When ‘0’, the outputs are enabled on the pins. When ‘1’, the pins are high-Z. Controls pin RDP3, RDN3 and RCLK3. When ‘0’, the outputs are enabled on the pins. When ‘1’, the pins are high-Z. Controls pin RDP2, RDN2 and RCLK2. When ‘0’, the outputs are enabled on the pins. When ‘1’, the pins are high-Z. Control pin ACK. When ‘0’, the output is enabled on pin ACK. When ‘1’, the pin is high-Z. 41 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-21 Boundary Scan Register Description (Continued) Bit No. 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 Bit Symbol MODE0 LOG0 LOG0 LOG0 MASK MASK MASK LOG1 MASK LOG0 LOG0 LOG0 MASK MASK MASK LOG1 MASK OE CLKE MASK MASK MASK LOG1 MASK LOG0 LOG0 LOG0 MASK MASK MASK LOG1 MASK LOG0 LOG0 LOG0 MCLK MODE2 A4 A3 A2 A1 A0 Pin Signal MODE0 LOG0(1) LOG0 LOG0 MASK(2) MASK MASK LOG1(3) MASK LOG0 LOG0 LOG0 MASK MASK MASK LOG1 MASK OE CLKE MASK MASK MASK LOG1 MASK LOG0 LOG0 LOG0 MASK MASK MASK LOG1 MASK LOG0 LOG0 LOG0 MCLK MODE2 A4 A3 A2 A1 A0 Type I I I I O O O O I I I O O O O I I O O O O I I I O O O O I I I I I I I I I I Comments 1. Set to Logic 0. 2. Reserved output, do not test. 3. Set to Logic 1. 4.3 TEST ACCESS PORT CONTROLLER instruction registers. The value shown next to each state transition in this figure states the value present at TMS at each rising edge of TCK. Refer to Table-22 for details of the state description. The TAP controller is a 16-state synchronous state machine. Figure24 shows its state diagram A description of each state follows. Note that the figure contains two main branches to access either the data or IEEE STD 1149.1 JTAG Test Access Port 42 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-22 TAP Controller State Description State Description Test Logic Reset In this state, the test logic is disabled. The device is set to normal operation. During initialization, the device initializes the instruction register with the IDCODE instruction. Regardless of the original state of the controller, the controller enters the Test-Logic-Reset state when the TMS input is held high for at least 5 rising edges of TCK. The controller remains in this state while TMS is high. The device processor automatically enters this state at power-up. Run-Test/Idle This is a controller state between scan operations. Once in this state, the controller remains in the state as long as TMS is held low. The instruction register and all test data registers retain their previous state. When TMS is high and a rising edge is applied to TCK, the controller moves to the Select-DR state. Select-DR-Scan This is a temporary controller state and the instruction does not change in this state. The test data register selected by the current instruction retains its previous state. If TMS is held low and a rising edge is applied to TCK when in this state, the controller moves into the Capture-DR state and a scan sequence for the selected test data register is initiated. If TMS is held high and a rising edge applied to TCK, the controller moves to the Select-IR-Scan state. Capture-DR In this state, the Boundary Scan Register captures input pin data if the current instruction is EXTEST or SAMPLE/PRELOAD. The instruction does not change in this state. The other test data registers, which do not have parallel input, are not changed. When the TAP controller is in this state and a rising edge is applied to TCK, the controller enters the Exit1-DR state if TMS is high or the Shift-DR state if TMS is low. Shift-DR In this controller state, the test data register connected between TDI and TDO as a result of the current instruction shifts data on stage toward its serial output on each rising edge of TCK. The instruction does not change in this state. When the TAP controller is in this state and a rising edge is applied to TCK, the controller enters the Exit1-DR state if TMS is high or remains in the Shift-DR state if TMS is low. Exit1-DR This is a temporary state. While in this state, if TMS is held high, a rising edge applied to TCK causes the controller to enter the Update-DR state, which terminates the scanning process. If TMS is held low and a rising edge is applied to TCK, the controller enters the Pause-DR state. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. Pause-DR The pause state allows the test controller to temporarily halt the shifting of data through the test data register in the serial path between TDI and TDO. For example, this state could be used to allow the tester to reload its pin memory from disk during application of a long test sequence. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. The controller remains in this state as long as TMS is low. When TMS goes high and a rising edge is applied to TCK, the controller moves to the Exit2-DR state. Exit2-DR This is a temporary state. While in this state, if TMS is held high, a rising edge applied to TCK causes the controller to enter the Update-DR state, which terminates the scanning process. If TMS is held low and a rising edge is applied to TCK, the controller enters the Shift-DR state. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. Update-DR The Boundary Scan Register is provided with a latched parallel output to prevent changes while data is shifted in response to the EXTEST and SAMPLE/PRELOAD instructions. When the TAP controller is in this state and the Boundary Scan Register is selected, data is latched into the parallel output of this register from the shift-register path on the falling edge of TCK. The data held at the latched parallel output changes only in this state. All shift-register stages in the test data register selected by the current instruction retain their previous value and the instruction does not change during this state. Select-IR-Scan This is a temporary controller state. The test data register selected by the current instruction retains its previous state. If TMS is held low and a rising edge is applied to TCK when in this state, the controller moves into the Capture-IR state, and a scan sequence for the instruction register is initiated. If TMS is held high and a rising edge is applied to TCK, the controller moves to the Test-Logic-Reset state. The instruction does not change during this state. Capture-IR In this controller state, the shift register contained in the instruction register loads a fixed value of ‘100’ on the rising edge of TCK. This supports fault-isolation of the board-level serial test data path. Data registers selected by the current instruction retain their value and the instruction does not change during this state. When the controller is in this state and a rising edge is applied to TCK, the controller enters the Exit1IR state if TMS is held high, or the Shift-IR state if TMS is held low. Shift-IR In this state, the shift register contained in the instruction register is connected between TDI and TDO and shifts data one stage towards its serial output on each rising edge of TCK. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. When the controller is in this state and a rising edge is applied to TCK, the controller enters the Exit1-IR state if TMS is held high, or remains in the Shift-IR state if TMS is held low. IEEE STD 1149.1 JTAG Test Access Port 43 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT Table-22 TAP Controller State Description (Continued) State Description Exit1-IR This is a temporary state. While in this state, if TMS is held high, a rising edge applied to TCK causes the controller to enter the Update-IR state, which terminates the scanning process. If TMS is held low and a rising edge is applied to TCK, the controller enters the Pause-IR state. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. Pause-IR The pause state allows the test controller to temporarily halt the shifting of data through the instruction register. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. The controller remains in this state as long as TMS is low. When TMS goes high and a rising edge is applied to TCK, the controller moves to the Exit2-IR state. Exit2-IR This is a temporary state. While in this state, if TMS is held high, a rising edge applied to TCK causes the controller to enter the Update-IR state, which terminates the scanning process. If TMS is held low and a rising edge is applied to TCK, the controller enters the Shift-IR state. The test data register selected by the current instruction retains its previous value and the instruction does not change during this state. Update-IR The instruction shifted into the instruction register is latched into the parallel output from the shift-register path on the falling edge of TCK. When the new instruction has been latched, it becomes the current instruction. The test data registers selected by the current instruction retain their previous value. 1 Test-logic Reset 0 0 Run Test/Idle 1 Select-DR 1 Select-IR 0 1 0 1 Capture-DR Capture-IR 0 0 0 0 Shift-DR Shift-IR 1 1 1 Exit1-DR 1 Exit1-IR 0 0 0 0 Pause-DR Pause-IR 1 0 1 0 Exit2-DR Exit2-IR 1 1 Update-DR 0 1 1 Update-IR 1 0 Figure-24 JTAG State Diagram IEEE STD 1149.1 JTAG Test Access Port 44 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT ABSOLUTE MAXIMUM RATING Symbol VDDA, VDDD VDDIO0, VDDIO1 VDDT0-3 Min Max Unit Core Power Supply Parameter -0.5 4.0 V I/O Power Supply -0.5 4.0 V Transmit Power Supply -0.5 7.0 V GND-0.5 5.5 V GND-0.5 VDDA+ 0.5 VDDD+ 0.5 V V 100 mA 10 mA ±100 mA Input Voltage, any digital pin Vin Input Voltage(1), RTIPn pins and RRINGn pins ESD Voltage, any pin(2) Transient Latch-up Current, any pin Iin 2000 Input Current, any digital pin(3) V -10 DC Input Current, any analog pin(3) Pd Maximum Power Dissipation in package 1.6 W Tc Case Temperature 120 °C Ts Storage Temperature +150 °C -65 CAUTION: Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 1. Referenced to ground 2. Human body model 3. Constant input current RECOMMENDED OPERATING CONDITIONS Symbol Min Typ Max Unit Core Power Supply 3.13 3.3 3.47 V VDDIO I/O Power Supply 3.13 3.3 3.47 V VDDT(1) Transmitter Supply 3.3 V 3.13 3.3 3.47 V 5V 4.75 5.0 5.25 V -40 25 25 85 °C Ω Average Core Power Supply Current(2) 55 65 mA IVDDIO I/O Power Supply Current(3) 15 25 mA IVDDT Average transmitter power supply current, T1 mode(2),(4),(5) 50% ones density data: 100% ones density data: 125 235 mA mA VDDA, VDDD TA RL IVDD Parameter Ambient Operating Temperature Output load at TTIPn pins and TRINGn pins 1. For T1 applications, only 5 V VDDT is supported. 2. Maximum power and current consumption over the full operating temperature and power supply voltage range. Includes all channels. 3. Digital output is driving 50 pF load, digital input is within 10% of the supply rails. 4. T1 maximum values measured with maximum cable length (LEN = 111). Typical values measured with typical cable length (LEN = 101). 5. Power consumption includes power absorbed by line load and external transmitter components. Absolute Maximum Rating 45 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT POWER CONSUMPTION Symbol Parameter LEN Min Typ Max(1)(2) Unit 000 000 - 403 613 686 mW mW 000 000 - 368 543 607 mW mW E1, 3.3 V, 75 Ω Load 50% ones density data: 100% ones density data: E1, 3.3 V, 120 Ω Load 50% ones density data: 100% ones density data: E1, 5.0 V, 75 Ω Load 50% ones density data: 100% ones density data: E1, 5.0 V, 120 Ω Load 50% ones density data: 100% ones density data: 000 000 - 511 829 927 mW mW 000 000 - 458 723 809 mW mW T1, 5.0 V, 100 Ω Load (3) 50% ones density data: 100% ones density data: 101 111 - 802 1412 1580 mW mW 1. Maximum power and current consumption over the full operating temperature and power supply voltage range. Includes all channels. 2. Power consumption includes power absorbed by line load and external transmitter components. 3.T1 maximum values measured with maximum cable length (LEN = 111). Typical values measured with typical cable length (LEN = 101). DC CHARACTERISTICS Symbol VIL Parameter Min Typ 1 --3 All other digital inputs pins Input Mid Level Voltage 1 --3 MODE2, JAS and LPn pins VIH 1. MODE2, JAS and LPn pins 2 --- VDDIO+ 0.2 3 All other digital inputs pins 2.0 Output Low level Voltage(1) (Iout = 1.6 mA) VOH Output High level Voltage(1) (Iout = 400 µA) Analog Input Quiescent Voltage (RTIPn/RRINGn pin while floating) Input High Level Current (MODE2, JAS and LPn pin) Input Low Level Current (MODE2, JAS and LPn pin) Input Leakage Current TMS, TDI and TRST pins All other digital input pins High-Z Leakage Current Output High Impedance on TTIPn pins and TRINGn pins IZL ZOH VDDIO+0.2 1 --- VDDIO 2 VDDIO-0.2 V 0.8 V 2 --- VDDIO-0.2 3 V Input High Voltage VOL VMA IH IL II Unit Input Low Level Voltage MODE2, JAS and LPn pins VIM Max V 0.4 2.4 1.33 -10 -10 150 1.4 V V VDDIO V 1.47 50 50 V µA µA 50 10 10 µA µA µA kΩ Output drivers will output CMOS logic levels into CMOS loads. Power Consumption 46 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT TRANSMITTER CHARACTERISTICS Symbol Vo-p Parameter Output Pulse Amplitudes(1) E1, 75 Ω load E1, 120 Ω load T1, 100 Ω load VO-S Zero (space) Level E1, 75 Ω load E1, 120 Ω load T1, 100 Ω load Transmit Amplitude Variation with supply Min Typ Max Unit 2.14 2.7 2.4 2.37 3.0 3.0 2.6 3.3 3.6 V V V -0.237 -0.3 -0.15 0.237 0.3 0.15 V V V -1 +1 % 200 mV 256 362 ns ns Difference between pulse sequences for 17 consecutive pulses TPW RTX Output Pulse Width at 50% of nominal amplitude E1: T1: 232 338 Ratio of the amplitudes of Positive and Negative Pulses at the center of the pulse interval 0.95 E1, 120 Ω T1 (VDDT = 5 V) Td 51 kHz – 102 kHz 102 kHz – 2.048 MHz 2.048 MHz – 3.072 MHz 51 kHz – 102 kHz 102 kHz – 2.048 MHz 2.048 MHz – 3.072 MHz 51 kHz – 102 kHz 102 kHz – 2.048 MHz 2.048 MHz – 3.072 MHz 15 15 15 15 15 15 15 15 15 dB dB dB dB dB dB dB dB dB Intrinsic Transmit Jitter (TCLK is jitter free, JA enabled) E1: 20 Hz – 100 kHz 0.050 U.I. T1: 10 Hz – 8 kHz 8 kHz – 40 kHz 10 Hz – 40 kHz Wide Band 0.020 0.025 0.025 0.050 U.I.p-p U.I.p-p U.I.p-p U.I.p-p 8 3 U.I. U.I. 180 mAp Transmit Path Delay (JA is disabled) Single Rail Dual Rail ISC 1.05 Transmit Return Loss(2) E1, 75 Ω JTXP-P 244 350 Line Short Circuit Current (3) 1. E1: measured at the line output ports; T1: measured at the DSX 2. Test at IDT82V2044 evaluation board 3. Measured on device, between TTIPn and TRINGn Transmitter Characteristics 47 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT RECEIVER CHARACTERISTICS Symbol ATT Parameter Min Typ Permissible Cable Attenuation (E1: @ 1024 kHz, T1: @ 772 kHz) Max Unit 15 dB IA Input Amplitude 0.1 SIR Signal to Interference Ratio Margin(1) -15 SRE Data Decision Threshold (refer to peak input voltage) 50 % Data Slicer Threshold 150 mV Analog Loss Of Signal(2) 120/150 Declare/Clear: Allowable consecutive zeros before LOS E1, G.775: E1, ETSI 300 233: T1, T1.231-1993 Peak to Peak Intrinsic Receive Jitter (JA disabled) E1 (wide band): T1 (wide band): JTRX Jitter Tolerance Vp dB 200/250 280/350 mVp 32 2048 175 LOS Reset Clock Recovery Mode JRXp-p 0.9 12.5 % ones 0.0625 0.0625 U.I. U.I. E1: 1 Hz – 20 Hz 20 Hz – 2.4 kHz 18 kHz – 100 kHz 18.0 1.5 0.2 U.I. U.I. U.I. T1: 0.1 Hz – 1 Hz 4.9 Hz – 300 Hz 10 kHz – 100 kHz 138.0 28.0 0.4 U.I. U.I. U.I. ZDM Receiver Differential Input Impedance ZCM Receiver Common Mode Input Impedance to GND 10 kΩ RRX Receive Return Loss 51 kHz – 102 kHz 102 kHz – 2.048 MHz 2.048 MHz – 3.072 MHz 20 20 20 dB dB dB 120 Receive Path Delay Dual Rail Single Rail 3 8 kΩ U.I. U.I. 1. E1: per G.703, O.151 @ 6 dB cable attenuation. T1: @ 655 ft. of 22 ABAM cable 2. Measured on device, between RTIP and RRING, all ones signal. Receiver Characteristics 48 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT JITTER ATTENUATOR CHARACTERISTICS Symbol f-3dB Parameter Min Typ Max Unit Jitter Transfer Function Corner Frequency (–3 dB) Host mode E1, 32/64 bit FIFO JABW = 0: JABW = 1: T1, 32/64 bit FIFO JABW = 0: JABW = 1: Hardware mode E1 T1 1.7 6.6 Hz Hz 2.5 5 Hz Hz 1.7 2.5 Hz Hz Jitter Attenuator td E1(1): @ 3 Hz @ 40 Hz @ 400 Hz @ 100 kHz -0.5 -0.5 +19.5 +19.5 dB dB dB dB T1(2): @ 1 Hz @ 20 Hz @ 1 kHz @ 1.4 kHz @ 70 kHz 0 0 +33.3 40 40 dB dB dB dB dB Jitter Attenuator Latency Delay 32 bit FIFO: 64 bit FIFO: Input Jitter Tolerance before FIFO Overflow Or Underflow 32 bit FIFO: 64 bit FIFO: Output Jitter in Remote Loopback(3) 16 32 U.I. U.I. 28 56 U.I. U.I. 0.11 U.I. 1. Per G.736, see Figure-41 on page 60. 2. Per AT&T pub.62411, see Figure-42 on page 60. 3. Per ETSI CTR12/13 output jitter. Jitter Attenuator Characteristics 49 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT TRANSCEIVER TIMING CHARACTERISTICS Symbol Parameter Min Typ Max Unit MCLK Frequency 2.048 1.544 E1: T1: MHz MHz MCLK Tolerance -100 100 ppm MCLK Duty Cycle 40 60 % Transmit Path TCLK Frequency 2.048 1.544 E1: T1: MHz MHz TCLK Tolerance -50 +50 90 TCLK Duty Cycle 10 t1 Transmit Data Setup Time 40 t2 Transmit Data Hold Time 40 40 % ns ns Delay time of OE low to driver High-Z Delay time of TCLK low to driver High-Z ppm 44 1 µs 48 µs Receive Path Clock Recovery Capture Range(1) E1: ± 80 ± 180 T1: RCLK Duty Cycle(2) t4 Rise/Fall Time(3) 488 648 519 689 ns ns 203 259 244 324 285 389 ns ns 203 259 244 324 285 389 ns ns 30 ns 200 200 244 324 ns ns 200 200 244 324 ns ns 200 300 244 324 ns ns Receive Data Hold Time RDPn/RDNn Pulse Width (MCLK = High)(4) E1: T1: 1. 457 607 Receive Data Setup Time E1: T1: t9 ppm % 5 E1: T1: t8 60 RCLK Pulse Width High Time E1: T1: t7 50 RCLK Pulse Width Low Time E1: T1: t6 40 RCLK Pulse Width(2) E1: T1: t5 ppm Relative to nominal frequency, MCLK = ± 100 ppm 2. RCLK duty cycle widths will vary depending on extent of received pulse jitter displacement. Maximum and minimum RCLK duty cycles are for worst case jitter conditions (0.2 UI displacement for E1 per ITU G.823). 3. For all digital outputs. C load = 15 pF 4. Clock recovery is disabled in this mode. Transceiver Timing Characteristics 50 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT TCLKn t1 t2 TDn/TDPn BPVIn/TDNn Figure-25 Transmit System Interface Timing t4 RCLKn t6 t5 t7 t8 RDn/RDPn (CLKE = 1) CVn/RDNn t7 t8 RDn/RDPn (CLKE = 0) CVn/RDNn Figure-26 Receive System Interface Timing Transceiver Timing Characteristics 51 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT JTAG TIMING CHARACTERISTICS Symbol Parameter Min Typ Max Unit t1 TCK Period 200 ns t2 TMS to TCK setup Time TDI to TCK Setup Time 50 ns t3 TCK to TMS Hold Time TCK to TDI Hold Time 50 ns t4 TCK to TDO Delay Time 100 Comments ns t1 TCK t2 t3 TMS TDI t4 TDO Figure-27 JTAG Interface Timing JTAG Timing Characteristics 52 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT PARALLEL HOST INTERFACE TIMING CHARACTERISTICS INTEL MODE READ TIMING CHARACTERISTICS Symbol t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t14 t15 t16 1. Parameter Min Active RD Pulse Width Active CS to Active RD Setup Time Inactive RD to Inactive CS Hold Time Valid Address to Inactive ALE Setup Time (in Multiplexed Mode) Invalid RD to Address Hold Time (in Non-Multiplexed Mode) Active RD to Data Output Enable Time Inactive RD to Data High-Z Delay Time Active CS to RDY delay time Inactive CS to RDY High-Z Delay Time Inactive RD to Inactive INT Delay Time Address Latch Enable Pulse Width (in Multiplexed Mode) Address Latch Enable to RD Setup Time (in Multiplexed Mode) Address Setup time to Valid Data Time (in Non-Multiplexed Mode) Inactive RD to Active RDY Delay Time Active RD to Active RDY Delay Time Inactive ALE to Address Hold Time (in Multiplexed Mode) 90 0 0 5 0 7.5 7.5 6 6 10 0 18 10 30 5 Typ Max 15 15 12 12 20 32 15 85 Unit Comments ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns (1) The t1 is determined by the start time of the valid data when the RDY signal is not used. Parallel Host Interface Timing Characteristics 53 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT t2 CS t3 t1 RD ALE(=1) t13 t5 ADDRESS A[4:0] t6 t7 DATA OUT D[7:0] t14 t8 t9 RDY t15 t10 INT Figure-28 Non-Multiplexed Intel Mode Read Timing t2 CS t3 t1 RD t11 t12 ALE t13 t16 t4 AD[7:0] t6 t7 ADDRESS DATA OUT t14 t8 t9 RDY t15 t10 INT Figure-29 Multiplexed Intel Mode Read Timing Parallel Host Interface Timing Characteristics 54 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT INTEL MODE WRITE TIMING CHARACTERISTICS Symbol t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t14 t15 Parameter Min Active WR Pulse Width Active CS to Active WR Setup Time Inactive WR to Inactive CS Hold Time Valid Address to Latch Enable Setup Time (in Multiplexed Mode) Invalid WR to Address Hold Time (in Non-Multiplexed Mode) Valid Data to Inactive WR Setup Time Inactive WR to Data Hold Time Active CS to Inactive RDY Delay Time Active WR to Active RDY Delay Time Inactive WR to Inactive RDY Delay Time Invalid CS to RDY High-Z Delay Time Address Latch Enable Pulse Width (in Multiplexed Mode) Inactive ALE to WR Setup Time (in Multiplexed Mode) Inactive ALE to Address hold time (in Multiplexed Mode) Address setup time to Inactive WR time (in Non-Multiplexed Mode) Typ Max 90 0 0 5 2 5 10 6 30 10 6 10 0 5 5 12 85 15 12 Unit Comments ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns (1) 1. The t1 can be 15 ns when RDY signal is not used. CS t2 t1 t3 WR ALE(=1) t15 t5 ADDRESS A[4:0] t7 t6 WRITE DATA D[7:0] t10 t8 t11 RDY t9 Figure-30 Non-Multiplexed Intel Mode Write Timing t2 t3 CS t1 WR t12 t13 ALE t14 t4 AD[7:0] t6 ADDRESS t8 t7 WRITE DATA t11 t9 RDY t10 Figure-31 Multiplexed Intel Mode Write Timing Parallel Host Interface Timing Characteristics 55 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT MOTOROLA MODE READ TIMING CHARACTERISTICS Symbol t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 t14 Parameter Min Active DS Pulse Width Active CS to Active DS Setup Time Inactive DS to Inactive CS Hold Time Valid R/W to Active DS Setup Time Inactive DS to R/W Hold Time Valid Address to Active DS Setup Time (in Non-Multiplexed Mode) Active DS to Address Hold Time (in Non-Multiplexed Mode) Active DS to Data Valid Delay Time (in Non-Multiplexed Mode) Active DS to Data Output Enable Time Inactive DS to Data High-Z Delay Time Active DS to Active ACK Delay Time Inactive DS to Inactive ACK Delay Time Inactive DS to Invalid INT Delay Time Active AS to Active DS Setup Time (in Multiplexed Mode) Typ Max 90 0 0 0 0.5 5 10 20 7.5 7.5 30 10 35 15 15 85 15 20 5 Unit Comments ns ns ns ns ns ns ns ns ns ns ns ns ns ns (1) 1. The t1 is determined by the start time of the valid data when the ACK signal is not used. CS t4 t5 R/W t1 t2 t3 DS ALE(=1) t6 t7 ADDRESS A[4:0] t10 t8 DATA OUT D[7:0] t9 ACK t12 t11 t13 INT Figure-32 Non-Multiplexed Motorola Mode Read Timing CS t2 t3 R/W t1 t4 t5 DS t14 AS t6 AD[7:0] t7 ADDRESS t8 t9 t10 DATA OUT t11 t12 ACK t13 INT Figure-33 Multiplexed Motorola Mode Read Timing Parallel Host Interface Timing Characteristics 56 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT MOTOROLA MODE WRITE TIMING CHARACTERISTICS Symbol t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t12 t13 Parameter Min Active DS Pulse Width Active CS to Active DS Setup Time Inactive DS to Inactive CS Hold Time Valid R/W to Active DS Setup Time Inactive DS to R/W Hold Time Valid Address to Active DS Setup Time (in Non-Multiplexed Mode) Valid DS to Address Hold Time (in Non-Multiplexed Mode) Valid Data to Inactive DS Setup Time Inactive DS to Data Hold Time Active DS to Active ACK Delay Time Inactive DS to Inactive ACK Delay Time Active AS to Active DS (in Multiplexed Mode) Inactive DS to Inactive AS Hold Time (in Multiplexed Mode) Typ Max 90 0 0 10 0 10 10 5 10 30 10 0 15 85 15 Unit Comments ns ns ns ns ns ns ns ns ns ns ns ns ns (1) 1. The t1 can be 15ns when the ACK signal is not used. CS t4 t5 R/W t1 t2 t3 DS ALE(=1) t6 t7 ADDRESS A[4:0] t8 t9 WRITE DATA t11 D[7:0] t10 ACK Figure-34 Non-Multiplexed Motorola Mode Write Timing CS t2 t3 R/W t4 t1 t5 DS t12 t13 AS t6 AD[7:0] t8 t7 ADDRESS t9 WRITE DATA t10 t11 ACK Figure-35 Multiplexed Motorola Mode Writing Timing Parallel Host Interface Timing Characteristics 57 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT SERIAL HOST INTERFACE TIMING CHARACTERISTICS Symbol t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 Parameter Min SCLK High Time SCLK Low Time Active CS to SCLK Setup Time Last SCLK Hold Time to Inactive CS Time CS Idle Time SDI to SCLK Setup Time SCLK to SDI Hold Time Rise/Fall Time (any pin) SCLK Rise and Fall Time SCLK to SDO Valid Delay Time SCLK Falling Edge to SDO High-Z Hold Time (CLKE = 0) or CS Rising Edge to SDO High-Z Hold Time (CLKE = 1) Typ Max Unit Comments 100 50 35 ns ns ns ns ns ns ns ns ns ns Load = 50 pF 25 25 10 50 50 5 5 25 100 ns CS t3 t1 t4 t2 t5 SCLK t6 SDI t7 t7 LSB MSB LSB CONTROL BYTE DATA BYTE Figure-36 Serial Interface Write Timing 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SCLK t10 t4 CS SDO 0 1 2 3 4 5 t11 7 6 Figure-37 Serial Interface Read Timing with CLKE = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SCLK t4 t10 CS t11 SDO 0 1 2 3 4 5 6 7 Figure-38 Serial Interface Read Timing with CLKE = 1 Parallel Host Interface Timing Characteristics 58 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT JITTER TOLERANCE PERFORMANCE E1 JITTER TOLERANCE PERFORMANCE 1 10 3 100 G.823 IDT82V2044 Jitter (UI) 18 UI @ 1.8 Hz 10 1.5 UI @ 20 Hz 1 1.5 UI @ 2.4 kHz 0.2 UI @ 18 kHz 0.1 1 10 100 1 10 3 4 1 10 5 1 10 Frequency (Hz) Test condition: PRBS 2^15-1; Line code rule HDB3 is used. Figure-39 E1 Jitter Tolerance Performance T1 JITTER TOLERANCE PERFORMANCE 1 10 3 AT&T62411 IDT82V2044 Jitter (UI) 100 28 UI @ 4.9 Hz 28 UI @ 300 Hz 10 1 0.4 UI @ 10kHz 0.1 1 10 100 3 1 10 1 10 4 1 10 5 Frequency (Hz) Test condition: QRSS; Line code rule B8ZS is used. Figure-40 T1 Jitter Tolerance Performance Jitter Tolerance Performance 59 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT JITTER TRANSFER PERFORMANCE E1 JITTER TRANSFER PERFORMANCE 0.5 dB @ 3 Hz 0.5 dB @ 40 Hz 0 -19.5 dB @ 400 Hz -20 -19.5 dB @ 20 kHz f3dB = 6.5 Hz Gain (dB) G.736 IDT82V2044 -40 -60 f3dB = 1.7 Hz 1 10 1 10 3 100 1 104 1 105 Frequency (Hz) Test condition: PRBS 2^15-1; Line code rule HDB3 is used. Figure-41 E1 Jitter Transfer Performance T1 JITTER TRANSFER PERFORMANCE 0 dB @ 1 Hz 0 -6 dB @ 2 Hz AT&T62411 GR-253-CORE IDT82V2044 0.5 dB @ 350 Hz 0 dB @ 20 Hz f3dB = 2.5 Hz Gain (dB) TR-TSY-000009 -20 0.1 dB @ 40 Hz -33.3 dB @ 1 kHz -33.7 dB @ 2.5 kHz -40 dB @ 1.4 kHz f3dB = 5 Hz -40 -40 dB @ 70 kHz -49.2 dB @ 15 kHz -60 dB @ 57 Hz -60 1 10 100 1 103 1 104 1 105 Frequency (Hz) Test condition: QRSS; Line code rule B8ZS is used. Figure-42 T1 Jitter Transfer Performance Jitter Transfer Performance 60 September 22, 2005 IDT82V2044 QUAD T1/E1 SHORT HAUL LINE INTERFACE UNIT ORDERING INFORMATION IDT XXXXXXX Device Type XX Package X Process/ Temperature Range Blank Industrial (-40 °C to + 85 °C) BB BBG DA DAG Plastic Ball Grid Array (PBGA, BB160) Green Plastic Ball Grid Array (PBGA, BBG160) Thin Quad Flatpack (TQFP, DA144) Green Thin Quad Flatpack (TQFP, DAG144) 82V2044 QUAD T1/E1 Short Haul LIU for SALES: 1-800-345-7015 or 408-284-8200 fax: 408-284-2775 CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 www.idt.com IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. 61 for Tech Support: 408-360-1552 email:telecomhelp@idt.com