82V3358TF

SYNCHRONOUS ETHERNET WAN PLL IDT82V3358 Version 4 May 19, 2009 6024 Silver Creek Valley Road, San Jose, CA 95138 Telephone: (800) 345-7015 • TWX: 910-338-2070 • FAX: (408) 284-2775 Printed in U.S.A. © 2009 Integrated Device Technology, Inc. DISCLAIMER Integrated Device Technology, Inc. reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. IDT does not assume any responsibility for use of any circuitry described other than the circuitry embodied in an IDT product. The Company makes no representations that circuitry described herein is free from patent infringement or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent, patent rights or other rights, of Integrated Device Technology, Inc. LIFE SUPPORT POLICY Integrated Device Technology's products are not authorized for use as critical components in life support devices or systems unless a specific written agreement pertaining to such intended use is executed between the manufacturer and an officer of IDT. 1. Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any components of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Table of Contents FEATURES .............................................................................................................................................................................. 9 HIGHLIGHTS.................................................................................................................................................................................................... 9 MAIN FEATURES ............................................................................................................................................................................................ 9 OTHER FEATURES ......................................................................................................................................................................................... 9 APPLICATIONS....................................................................................................................................................................... 9 DESCRIPTION....................................................................................................................................................................... 10 FUNCTIONAL BLOCK DIAGRAM ........................................................................................................................................ 11 1 PIN ASSIGNMENT ........................................................................................................................................................... 12 2 PIN DESCRIPTION .......................................................................................................................................................... 13 3 FUNCTIONAL DESCRIPTION ......................................................................................................................................... 17 3.1 3.2 3.3 RESET ........................................................................................................................................................................................................... 17 MASTER CLOCK .......................................................................................................................................................................................... 17 INPUT CLOCKS & FRAME SYNC SIGNALS ............................................................................................................................................... 18 3.3.1 Input Clocks .................................................................................................................................................................................... 18 3.3.2 Frame SYNC Input Signals ............................................................................................................................................................ 18 3.4 INPUT CLOCK PRE-DIVIDER ...................................................................................................................................................................... 19 3.5 INPUT CLOCK QUALITY MONITORING ..................................................................................................................................................... 20 3.5.1 Activity Monitoring ......................................................................................................................................................................... 20 3.5.2 Frequency Monitoring ................................................................................................................................................................... 21 3.6 T0 / T4 DPLL INPUT CLOCK SELECTION .................................................................................................................................................. 22 3.6.1 External Fast Selection (T0 only) .................................................................................................................................................. 22 3.6.2 Forced Selection ............................................................................................................................................................................ 23 3.6.3 Automatic Selection ....................................................................................................................................................................... 23 3.7 SELECTED INPUT CLOCK MONITORING .................................................................................................................................................. 24 3.7.1 T0 / T4 DPLL Locking Detection ................................................................................................................................................... 24 3.7.1.1 Fast Loss .......................................................................................................................................................................... 24 3.7.1.2 Coarse Phase Loss .......................................................................................................................................................... 24 3.7.1.3 Fine Phase Loss ............................................................................................................................................................... 24 3.7.1.4 Hard Limit Exceeding ....................................................................................................................................................... 24 3.7.2 Locking Status ............................................................................................................................................................................... 24 3.7.3 Phase Lock Alarm (T0 only) .......................................................................................................................................................... 25 3.8 SELECTED INPUT CLOCK SWITCH ........................................................................................................................................................... 26 3.8.1 Input Clock Validity ........................................................................................................................................................................ 26 3.8.2 Selected Input Clock Switch ......................................................................................................................................................... 26 3.8.2.1 Revertive Switch ............................................................................................................................................................... 26 3.8.2.2 Non-Revertive Switch (T0 only) ........................................................................................................................................ 27 3.8.3 Selected / Qualified Input Clocks Indication ................................................................................................................................ 27 3.9 SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE ....................................................................................................... 28 3.9.1 T0 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 28 3.9.2 T4 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 30 3.10 T0 / T4 DPLL OPERATING MODE ............................................................................................................................................................... 31 3.10.1 T0 DPLL Operating Mode .............................................................................................................................................................. 31 3.10.1.1 Free-Run Mode ................................................................................................................................................................ 31 3.10.1.2 Pre-Locked Mode ............................................................................................................................................................. 31 3.10.1.3 Locked Mode .................................................................................................................................................................... 31 3.10.1.3.1 Temp-Holdover Mode .................................................................................................................................... 31 Table of Contents 3 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.10.1.4 Lost-Phase Mode ............................................................................................................................................................. 31 3.10.1.5 Holdover Mode ................................................................................................................................................................. 31 3.10.1.5.1 Automatic Instantaneous ............................................................................................................................... 32 3.10.1.5.2 Automatic Slow Averaged ............................................................................................................................. 32 3.10.1.5.3 Automatic Fast Averaged .............................................................................................................................. 32 3.10.1.5.4 Manual ........................................................................................................................................................... 32 3.10.1.5.5 Holdover Frequency Offset Read .................................................................................................................. 32 3.10.1.6 Pre-Locked2 Mode ........................................................................................................................................................... 32 3.10.2 T4 DPLL Operating Mode .............................................................................................................................................................. 32 3.10.2.1 Free-Run Mode ................................................................................................................................................................ 32 3.10.2.2 Locked Mode .................................................................................................................................................................... 32 3.10.2.3 Holdover Mode ................................................................................................................................................................. 32 T0 / T4 DPLL OUTPUT ................................................................................................................................................................................. 34 3.11.1 PFD Output Limit ............................................................................................................................................................................ 34 3.11.2 Frequency Offset Limit .................................................................................................................................................................. 34 3.11.3 PBO (T0 only) ................................................................................................................................................................................. 34 3.11.4 Phase Offset Selection (T0 only) .................................................................................................................................................. 34 3.11.5 Four Paths of T0 / T4 DPLL Outputs ............................................................................................................................................. 34 3.11.5.1 T0 Path ............................................................................................................................................................................. 34 3.11.5.2 T4 Path ............................................................................................................................................................................. 35 T0 / T4 APLL ................................................................................................................................................................................................. 36 OUTPUT CLOCKS & FRAME SYNC SIGNALS ........................................................................................................................................... 36 3.13.1 Output Clocks ................................................................................................................................................................................. 36 3.13.2 Frame SYNC Output Signals ......................................................................................................................................................... 40 INTERRUPT SUMMARY ............................................................................................................................................................................... 42 T0 AND T4 SUMMARY ................................................................................................................................................................................. 42 POWER SUPPLY FILTERING TECHNIQUES ............................................................................................................................................. 43 LINE CARD APPLICATION .......................................................................................................................................................................... 44 4 MICROPROCESSOR INTERFACE .................................................................................................................................. 45 5 JTAG ................................................................................................................................................................................ 47 6 PROGRAMMING INFORMATION .................................................................................................................................... 48 6.1 6.2 REGISTER MAP ............................................................................................................................................................................................ 48 REGISTER DESCRIPTION ........................................................................................................................................................................... 53 6.2.1 Global Control Registers ............................................................................................................................................................... 53 6.2.2 Interrupt Registers ......................................................................................................................................................................... 61 6.2.3 Input Clock Frequency & Priority Configuration Registers ....................................................................................................... 65 6.2.4 Input Clock Quality Monitoring Configuration & Status Registers ........................................................................................... 76 6.2.5 T0 / T4 DPLL Input Clock Selection Registers ............................................................................................................................. 87 6.2.6 T0 / T4 DPLL State Machine Control Registers ........................................................................................................................... 91 6.2.7 T0 / T4 DPLL & APLL Configuration Registers ............................................................................................................................ 93 6.2.8 Output Configuration Registers .................................................................................................................................................. 106 6.2.9 PBO & Phase Offset Control Registers ...................................................................................................................................... 112 6.2.10 Synchronization Configuration Registers ................................................................................................................................. 114 JUNCTION TEMPERATURE ...................................................................................................................................................................... 116 EXAMPLE OF JUNCTION TEMPERATURE CALCULATION ................................................................................................................... 116 HEATSINK EVALUATION .......................................................................................................................................................................... 116 ABSOLUTE MAXIMUM RATING ................................................................................................................................................................ 117 RECOMMENDED OPERATION CONDITIONS .......................................................................................................................................... 117 I/O SPECIFICATIONS ................................................................................................................................................................................. 118 8.3.1 CMOS Input / Output Port ............................................................................................................................................................ 118 8.3.2 PECL / LVDS Input / Output Port ................................................................................................................................................ 119 7 THERMAL MANAGEMENT ........................................................................................................................................... 116 7.1 7.2 7.3 8.1 8.2 8.3 8 ELECTRICAL SPECIFICATIONS .................................................................................................................................. 117 Table of Contents 4 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL PACKAGE DIMENSIONS.................................................................................................................................................... 134 ORDERING INFORMATION................................................................................................................................................ 139 8.4 8.5 8.6 8.7 8.3.2.1 PECL Input / Output Port ................................................................................................................................................ 119 8.3.2.2 LVDS Input / Output Port ................................................................................................................................................ 121 8.3.2.3 Single-Ended Input for Differential Input ........................................................................................................................ 122 JITTER & WANDER PERFORMANCE ....................................................................................................................................................... 123 OUTPUT WANDER GENERATION ............................................................................................................................................................ 126 INPUT / OUTPUT CLOCK TIMING ............................................................................................................................................................. 127 OUTPUT CLOCK TIMING ........................................................................................................................................................................... 128 Table of Contents 5 May 19, 2009 List of Tables Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: Table 7: Table 8: Table 9: Table 10: Table 11: Table 12: Table 13: Table 14: Table 15: Table 16: Table 17: Table 18: Table 19: Table 20: Table 21: Table 22: Table 23: Table 24: Table 25: Table 26: Table 27: Table 28: Table 29: Table 30: Table 31: Table 32: Table 33: Table 34: Table 35: Table 36: Table 37: Table 38: Table 39: Table 40: Table 41: Table 42: Table 43: Table 44: Table 45: Table 46: Table 47: Table 48: Pin Description ............................................................................................................................................................................................. 13 Related Bit / Register in Chapter 3.2 ........................................................................................................................................................... 17 Related Bit / Register in Chapter 3.3 ........................................................................................................................................................... 18 Related Bit / Register in Chapter 3.4 ........................................................................................................................................................... 19 Related Bit / Register in Chapter 3.5 ........................................................................................................................................................... 21 Input Clock Selection for T0 Path ................................................................................................................................................................ 22 Input Clock Selection for T4 Path ................................................................................................................................................................ 22 External Fast Selection ................................................................................................................................................................................ 22 ‘n’ Assigned to the Input Clock ..................................................................................................................................................................... 23 Related Bit / Register in Chapter 3.6 ........................................................................................................................................................... 23 Coarse Phase Limit Programming (the selected input clock of 2 kHz, 4 kHz or 8 kHz) .............................................................................. 24 Coarse Phase Limit Programming (the selected input clock of other than 2 kHz, 4 kHz and 8 kHz) .......................................................... 24 Related Bit / Register in Chapter 3.7 ........................................................................................................................................................... 25 Conditions of Qualified Input Clocks Available for T0 & T4 Selection ......................................................................................................... 26 Related Bit / Register in Chapter 3.8 ........................................................................................................................................................... 27 T0 DPLL Operating Mode Control ............................................................................................................................................................... 28 T4 DPLL Operating Mode Control ............................................................................................................................................................... 30 Related Bit / Register in Chapter 3.9 ........................................................................................................................................................... 30 Frequency Offset Control in Temp-Holdover Mode ..................................................................................................................................... 31 Frequency Offset Control in Holdover Mode ............................................................................................................................................... 32 Holdover Frequency Offset Read ................................................................................................................................................................ 32 Related Bit / Register in Chapter 3.10 ......................................................................................................................................................... 33 Related Bit / Register in Chapter 3.11 ......................................................................................................................................................... 35 Related Bit / Register in Chapter 3.12 ......................................................................................................................................................... 36 Outputs on OUT1 ~OUT4 if Derived from T0/T4 DPLL Outputs ................................................................................................................. 36 Outputs on OUT1 ~OUT4 if Derived from T0 APLL .................................................................................................................................... 37 Outputs on OUT3 & 4 if Derived from T4 APLL ........................................................................................................................................... 38 Outputs on OUT1 & OUT2 if Derived from T4 APLL ................................................................................................................................... 39 Frame Sync Input Signal Selection .............................................................................................................................................................. 40 Synchronization Control ............................................................................................................................................................................... 40 Related Bit / Register in Chapter 3.13 ......................................................................................................................................................... 41 Related Bit / Register in Chapter 3.14 ......................................................................................................................................................... 42 Read Timing Characteristics in Serial Mode ................................................................................................................................................ 46 Write Timing Characteristics in Serial Mode ................................................................................................................................................ 46 JTAG Timing Characteristics ....................................................................................................................................................................... 47 Register List and Map .................................................................................................................................................................................. 48 Power Consumption and Maximum Junction Temperature ....................................................................................................................... 116 Thermal Data ............................................................................................................................................................................................. 116 Absolute Maximum Rating ......................................................................................................................................................................... 117 Recommended Operation Conditions ........................................................................................................................................................ 117 CMOS Input Port Electrical Characteristics ............................................................................................................................................... 118 CMOS Input Port with Internal Pull-Up Resistor Electrical Characteristics ................................................................................................ 118 CMOS Input Port with Internal Pull-Down Resistor Electrical Characteristics ........................................................................................... 118 CMOS Output Port Electrical Characteristics ............................................................................................................................................ 118 PECL Input / Output Port Electrical Characteristics ................................................................................................................................... 120 LVDS Input / Output Port Electrical Characteristics ................................................................................................................................... 121 Output Clock Jitter Generation .................................................................................................................................................................. 123 Output Clock Phase Noise ......................................................................................................................................................................... 124 List of Tables 6 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL Table 49: Table 50: Table 51: Table 52: Table 53: Table 54: Table 55: Table 56: Input Jitter Tolerance (155.52 MHz) .......................................................................................................................................................... Input Jitter Tolerance (1.544 MHz) ............................................................................................................................................................ Input Jitter Tolerance (2.048 MHz) ............................................................................................................................................................ Input Jitter Tolerance (8 kHz) .................................................................................................................................................................... T0 DPLL Jitter Transfer & Damping Factor ............................................................................................................................................... T4 DPLL Jitter Transfer & Damping Factor ............................................................................................................................................... Input/Output Clock Timing ........................................................................................................................................................................ Output Clock Timing .................................................................................................................................................................................. 124 124 124 124 125 125 127 129 List of Tables 7 May 19, 2009 List of Figures Figure 1. Functional Block Diagram ............................................................................................................................................................................ 11 Figure 2. Pin Assignment (Top View) .......................................................................................................................................................................... 12 Figure 3. Pre-Divider for An Input Clock ..................................................................................................................................................................... 19 Figure 4. Input Clock Activity Monitoring ..................................................................................................................................................................... 20 Figure 5. External Fast Selection ................................................................................................................................................................................ 22 Figure 6. T0 Selected Input Clock vs. DPLL Automatic Operating Mode ................................................................................................................... 29 Figure 7. T4 Selected Input Clock vs. DPLL Automatic Operating Mode ................................................................................................................... 30 Figure 8. On Target Frame Sync Input Signal Timing ................................................................................................................................................. 40 Figure 9. 0.5 UI Early Frame Sync Input Signal Timing .............................................................................................................................................. 40 Figure 10. 0.5 UI Late Frame Sync Input Signal Timing .............................................................................................................................................. 41 Figure 11. 1 UI Late Frame Sync Input Signal Timing ................................................................................................................................................. 41 Figure 12. IDT82V3358 Power Decoupling Scheme ................................................................................................................................................... 43 Figure 13. Line Card Application ................................................................................................................................................................................. 44 Figure 14. Serial Read Timing Diagram (CLKE Asserted Low) ................................................................................................................................... 45 Figure 15. Serial Read Timing Diagram (CLKE Asserted High) .................................................................................................................................. 45 Figure 16. Serial Write Timing Diagram ....................................................................................................................................................................... 46 Figure 17. JTAG Interface Timing Diagram ................................................................................................................................................................. 47 Figure 18. Recommended PECL Input Port Line Termination .................................................................................................................................. 119 Figure 19. Recommended PECL Output Port Line Termination ................................................................................................................................ 119 Figure 20. Recommended LVDS Input Port Line Termination .................................................................................................................................. 121 Figure 21. Recommended LVDS Output Port Line Termination ................................................................................................................................ 121 Figure 22. Example of Single-Ended Signal to Drive Differential Input ..................................................................................................................... 122 Figure 23. Output Wander Generation ...................................................................................................................................................................... 126 Figure 24. Input / Output Clock Timing ...................................................................................................................................................................... 127 Figure 25. 64-Pin PP Package Dimensions (a) (in Millimeters) ................................................................................................................................. 134 Figure 26. 64-Pin PP Package Dimensions (b) (in Millimeters) ................................................................................................................................. 135 Figure 27. 64-Pin EDG Package Dimensions (a) (in Millimeters) .............................................................................................................................. 136 Figure 28. 64-Pin EDG Package Dimensions (b) (in Millimeters) .............................................................................................................................. 137 Figure 29. EDG64 Recommended Land Pattern with Exposed Pad (in Millimeters) ................................................................................................. 138 List of Figures 8 May 19, 2009 SYNCHRONOUS ETHERNET WAN PLL FEATURES HIGHLIGHTS • The first single PLL chip: • Features 0.1 Hz to 560 Hz bandwidth • Provides node clock for ITU-T G.8261/G.8262 Synchronous Ethernet • Exceeds GR-253-CORE (OC-12) and ITU-T G.813 (STM-16/ Option I) jitter generation requirements • Provides node clocks for Cellular and WLL base-station (GSM and 3G networks) • Provides clocks for DSL access concentrators (DSLAM), especially for Japan TCM-ISDN network timing based ADSL equipments Provides an integrated single-chip solution for Synchronous Equipment Timing Source, including Stratum 3, SMC, 4E and 4 clocks Employs DPLL and APLL to feature excellent jitter performance and minimize the number of the external components Integrates T0 DPLL and T4 DPLL; T4 DPLL locks independently or locks to T0 DPLL Supports Forced or Automatic operating mode switch controlled by an internal state machine; the primary operating modes are FreeRun, Locked and Holdover Supports programmable DPLL bandwidth (0.1 Hz to 560 Hz in 11 steps) and damping factor (1.2 to 20 in 5 steps) Supports 1.1X10-5 ppm absolute holdover accuracy and 4.4X10-8 ppm instantaneous holdover accuracy Supports PBO to minimize phase transients on T0 DPLL output to be no more than 0.61 ns Supports phase absorption when phase-time changes on T0 selected input clock are greater than a programmable limit over an interval of less than 0.1 seconds Supports programmable input-to-output phase offset adjustment Limits the phase and frequency offset of the outputs Supports manual and automatic selected input clock switch • • • • • • • • • • IDT82V3358 MAIN FEATURES • • • • • • • • • • • Supports automatic hitless selected input clock switch on clock failure Supports three types of input clock sources: recovered clock from STM-N or OC-n, PDH network synchronization timing and external synchronization reference timing Provides three 2 kHz, 4 kHz or 8 kHz frame sync input signals, and a 2 kHz and an 8 kHz frame sync output signals Provides 5 input clocks whose frequency cover from 2 kHz to 622.08 MHz Provides 4 output clocks whose frequency cover from 1 Hz to 622.08 MHz Provides output clocks for BITS, GPS, 3G, GSM, etc. Supports PECL/LVDS and CMOS input/output technologies Supports master clock calibration Supports Line Card application Meets Telcordia GR-1244-CORE, GR-253-CORE, ITU-T G.812, ITU-T G.813 and ITU-T G.783 criteria Serial microprocessor interface mode IEEE 1149.1 JTAG Boundary Scan Single 3.3 V operation with 5 V tolerant CMOS I/Os 64-pin TQFP package, Green package options available BITS / SSU SMC / SEC (SONET / SDH) DWDM cross-connect and transmission equipments Synchronous Ethernet equipments Central Office Timing Source and Distribution Core and access IP switches / routers Gigabit and Terabit IP switches / routers IP and ATM core switches and access equipments Cellular and WLL base-station node clocks Broadband and multi-service access equipments Any other telecom equipments that need synchronous equipment system timing OTHER FEATURES • • • • • • • • • • • • • • • APPLICATIONS IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. 9  2009 Integrated Device Technology, Inc. May 19, 2009 DSC-7215/4 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL DESCRIPTION The IDT82V3358 is an integrated, single-chip solution for the Synchronous Equipment Timing Source for Stratum 3, SMC, 4E and 4 clocks in SONET / SDH equipments, DWDM and Wireless base station, such as GSM, 3G, DSL concentrator, Router and Access Network applications. The device supports three types of input clock sources: recovered clock from STM-N or OC-n, PDH network synchronization timing and external synchronization reference timing. Based on ITU-T G.783 and Telcordia GR-253-CORE, the device consists of T0 and T4 paths. The T0 path is a high quality and highly configurable path to provide system clock for node timing synchronization within a SONET / SDH network. The T4 path is simpler and less configurable for equipment synchronization. The T4 path locks independently from the T0 path or locks to the T0 path. An input clock is automatically or manually selected for T0 and T4 each for DPLL locking. Both the T0 and T4 paths support three primary operating modes: Free-Run, Locked and Holdover. In Free-Run mode, the DPLL refers to the master clock. In Locked mode, the DPLL locks to the selected input clock. In Holdover mode, the DPLL resorts to the frequency data acquired in Locked mode. Whatever the operating mode is, the DPLL gives a stable performance without being affected by operating conditions or silicon process variations. If the DPLL outputs are processed by T0/T4 APLL, the outputs of the device will be in a better jitter/wander performance. The device provides programmable DPLL bandwidths: 0.1 Hz to 560 Hz in 11 steps and damping factors: 1.2 to 20 in 5 steps. Different settings cover all SONET / SDH clock synchronization requirements. A high stable input is required for the master clock in different applications. The master clock is used as a reference clock for all the internal circuits in the device. It can be calibrated within ±741 ppm. All the read/write registers are accessed through a serial microprocessor interface. The device supports Serial microprocessor interface mode only. The device can be used typically in Chapter 3.17 Line Card Application. Description 10 May 19, 2009 IDT82V3358 Functional Block Diagram T4 DPLL 77.76 MHz GSM/GPS/16E1/16T1 T4 Input Selector MUX T4 PFD & LPF 16E1/16T1 Divider 12E1/24T1/E3/T3 10 16E1/16T1/OBSAI Priority OUT7 MUX Divider (ETH + nonETH) OUT1_POS OUT1_NEG (ETH + nonETH) Input ETH + nonETH 10 T0 77.76 MHz Monitors nonETH 77.76 MHz 10 T0 APLL OUT4 MUX T0 8 kHz 8 k Divider T4 APLL 10 Priority Input Pre-Divider FUNCTIONAL BLOCK DIAGRAM IN1_CMOS IN1_DIFF Priority Priority Input Pre-Divider EX_SYNC1 Input Pre-Divider T4 APLL MUX OUT3 MUX Divider OUT2 (ETH + nonETH) Input Pre-Divider EX_SYNC1 IN2_CMOS IN2_DIFF EX_SYNC2 Priority EX_SYNC2 OUT1 MUX Divider OUT3 (nonETH) Input Pre-Divider IN3_CMOS EX_SYNC3 ETH/OBSAI/16E1/16T1 Figure 1. Functional Block Diagram 11 T0 APLL MUX 16E1/16T1/OBSAI PBO Phase Offset T0 Input Selector T0 PFD & LPF 12E1/24T1/E3/T3 16E1/16T1 Divider EX_SYNC3 Divider OUT4 (nonETH) Auto Divider Auto Divider FRSYNC_8K MFRSYNC_2K Output T0 DPLL APLL Microprocessor Interface JTAG OSCI Note: Configuration of OUTn (n = 1, 4, 3, 7) ETH MUX please refer to Table 25-27. SYNCHRONOUS ETHERNET WAN PLL May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 1 PIN ASSIGNMENT SONET/SDH IC6 IC5 IC4 IC3 OUT4 AGND3 VDDA3 OUT2 OUT3 VDDD6 DGND6 SDO TDI TDO TCK 64 63 62 AGND IC1 AGND1 VDDA1 INT_REQ OSCI DGND1 VDDD1 VDDD3 DGND3 DGND2 VDDD2 FF_SRCSW VDDA2 AGND2 IC2 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 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 RST SCLK VDDD5 VDDD5 CS SDI CLKE TMS DGND5 VDDD5 VDDD5 TRST VDDD5 EX_SYNC3 IN3_CMOS EX_SYNC2 IDT82V3358 42 41 40 39 38 37 36 35 34 33 Pin Assignment FRSYNC_8K MFRSYNC_2K OUT1_POS OUT1_NEG GND_DIFF VDD_DIFF IN1_POS IN1_NEG IN2_POS IN2_NEG NC EX_SYNC1 IN1_CMOS IN2_CMOS DGND4 VDDD4 Figure 2. Pin Assignment (Top View) 12 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 2 Name PIN DESCRIPTION Pin No. I/O Type Global Control Signal OSCI 6 I CMOS OSCI: Crystal Oscillator Master Clock A nominal 12.8000 MHz clock provided by a crystal oscillator is input on this pin. It is the master clock for the device. FF_SRCSW: External Fast Selection Enable During reset, this pin determines the default value of the EXT_SW bit (b4, 0BH)2. The EXT_SW bit determines whether the External Fast Selection is enabled. High: The default value of the EXT_SW bit (b4, 0BH) is ‘1’ (External Fast selection is enabled); Low: The default value of the EXT_SW bit (b4, 0BH) is ‘0’ (External Fast selection is disabled). After reset, this pin selects an input clock pair for the T0 DPLL if the External Fast selection is enabled: High: Pair IN1_CMOS / IN1_DIFF is selected. Low: Pair IN2_CMOS / IN2_DIFF is selected. After reset, the input on this pin takes no effect if the External Fast selection is disabled. SONET/SDH: SONET / SDH Frequency Selection During reset, this pin determines the default value of the IN_SONET_SDH bit (b2, 09H): High: The default value of the IN_SONET_SDH bit is ‘1’ (SONET); Low: The default value of the IN_SONET_SDH bit is ‘0’ (SDH). After reset, the value on this pin takes no effect. RST: Reset A low pulse of at least 50 µs on this pin resets the device. After this pin is high, the device will still be held in reset state for 500 ms (typical). EX_SYNC1: External Sync Input 1 A 2 kHz, 4 kHz or 8 kHz signal is input on this pin. EX_SYNC2: External Sync Input 2 A 2 kHz, 4 kHz or 8 kHz signal is input on this pin. EX_SYNC3: External Sync Input 3 A 2 kHz, 4 kHz or 8 kHz signal is input on this pin. Input Clock IN1_CMOS 29 IN1_CMOS: Input Clock 1 A 2 kHz, 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is input on this pin. IN2_CMOS: Input Clock 2 I CMOS A 2 kHz, 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, 19.44 MHz, pull-down 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is input on this pin. IN1_POS / IN1_NEG: Positive / Negative Input Clock 1 A 2 kHz, 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 156.25 MHz, 311.04 MHz or I PECL/LVDS 622.08 MHz clock is differentially input on this pair of pins. Whether the clock signal is PECL or LVDS is automatically detected. Single-ended input for differential input is also supported. Refer to Chapter 8.3.2.3 SingleEnded Input for Differential Input. I pull-down CMOS Description 1 Table 1: Pin Description FF_SRCSW 13 I pull-down CMOS SONET/SDH 64 I pull-down CMOS RST 48 I pull-up CMOS Frame Synchronization Input Signal EX_SYNC1 EX_SYNC2 EX_SYNC3 28 33 35 I pull-down I pull-down I pull-down CMOS CMOS CMOS IN2_CMOS 30 IN1_POS IN1_NEG 23 24 Pin Description 13 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name Pin No. I/O Type Description 1 IN2_POS IN2_NEG 25 26 IN3_CMOS 34 IN2_POS / IN2_NEG: Positive / Negative Input Clock 2 A 2 kHz, 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 155.52 MHz, 156.25 MHz, 311.04 MHz or I PECL/LVDS 622.08 MHz clock is differentially input on this pair of pins. Whether the clock signal is PECL or LVDS is automatically detected. Single-ended input for differential input is also supported. Refer to Chapter 8.3.2.3 SingleEnded Input for Differential Input. IN3_CMOS: Input Clock 3 I CMOS A 2 kHz, 4 kHz, N x 8 kHz 3, 1.544 MHz (SONET) / 2.048 MHz (SDH), 6.48 MHz, 19.44 MHz, pull-down 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is input on this pin. Output Frame Synchronization Signal FRSYNC_8K: 8 kHz Frame Sync Output An 8 kHz signal is output on this pin. MFRSYNC_2K: 2 kHz Multiframe Sync Output A 2 kHz signal is output on this pin. Output Clock FRSYNC_8K MFRSYNC_2K 17 18 O O CMOS CMOS OUT1_POS OUT1_NEG 19 O 20 OUT2 56 O OUT3 55 O OUT4 59 O OUT1_POS / OUT1_NEG: Positive / Negative Output Clock 1 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, PECL/LVDS 5 MHz, 10 MHz, 20 MHz, 25 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 125 MHz, 155.52 MHz, 156.25 MHz, 311.04 MHz, 312.5 MHz or 622.08 MHz clock is differentially output on this pair of pins. OUT2: Output Clock 2 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, CMOS 5 MHz, 10 MHz, 20 MHz, 25 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz, 125 MHz, 155.52 MHz, 156.25 MHz or 312.5 MHz clock is output on this pin. OUT3: Output Clock 3 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, CMOS 5 MHz, 10 MHz, 20 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is output on this pin. OUT4: Output Clock 4 A 1 Hz, 400 Hz, 2 kHz, 8 kHz, 64 kHz, N x E1 4, N x T1 5, N x 13.0 MHz 6, N x 3.84 MHz 7, CMOS 5 MHz, 10 MHz, 20 MHz, E3, T3, 6.48 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz, 77.76 MHz or 155.52 MHz clock is output on this pin. Microprocessor Interface CS: Chip Selection A transition from high to low must occur on this pin for each read or write operation and this pin should remain low until the operation is over. INT_REQ: Interrupt Request This pin is used as an interrupt request. The output characteristics are determined by the HZ_EN bit (b1, 0CH) and the INT_POL bit (b0, 0CH). SDI: Serial Data Input In Serial mode, this pin is used as the serial data input. Address and data on this pin are serially clocked into the device on the rising edge of SCLK. CLKE: SCLK Active Edge Selection In Serial mode, this pin selects the active edge of SCLK to update the SDO: High - The falling edge; Low - The rising edge. CS 44 I pull-up O CMOS INT_REQ 5 CMOS SDI CLKE 43 42 I pull-down CMOS Pin Description 14 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name SDO Pin No. 52 I/O I/O pull-down I pull-down Type CMOS Description 1 SDO: Serial Data Output In Serial mode, this pin is used as the serial data output. Data on this pin is serially clocked out of the device on the active edge of SCLK. SCLK: Shift Clock In Serial mode, a shift clock is input on this pin. Data on SDI is sampled by the device on the rising edge of SCLK. Data on SDO is updated on the active edge of SCLK. The active edge is determined by the CLKE. JTAG (per IEEE 1149.1) TRST 37 I pull-down I pull-up CMOS TRST: JTAG Test Reset (Active Low) A low signal on this pin resets the JTAG test port. This pin should be connected to ground when JTAG is not used. TMS: JTAG Test Mode Select The signal on this pin controls the JTAG test performance and is sampled on the rising edge of TCK. TCK: JTAG Test Clock The clock for the JTAG test is input on this pin. TDI and TMS are sampled on the rising edge of TCK and TDO is updated on the falling edge of TCK. If TCK is idle at a low level, all stored-state devices contained in the test logic will indefinitely retain their state. TDI: JTAG Test Data Input The test data is input on this pin. It is clocked into the device on the rising edge of TCK. TDO: JTAG Test Data Output The test data is output on this pin. It is clocked out of the device on the falling edge of TCK. TDO pin outputs a high impedance signal except during the process of data scanning. This pin can indicate the interrupt of T0 selected input clock fail, as determined by the LOS_FLAG_ON_TDO bit (b6, 0BH). Refer to Chapter 3.8.1 Input Clock Validity for details. Power & Ground VDDD1 VDDD2 VDDD3 VDDD4 VDDD5 VDDD6 VDDA1 VDDA2 VDDA3 VDD_DIFF GND_DIFF 8 12 9 Power 32 36, 38, 39, 45, 46 54 4 14 57 22 21 Power VDDDn: 3.3 V Digital Power Supply Each VDDDn should be paralleled with ground through a 0.1 µF capacitor. SCLK 47 CMOS TMS 41 CMOS TCK 49 I pull-down I pull-up CMOS TDI 51 CMOS TDO 50 O CMOS VDDAn: 3.3 V Analog Power Supply Each VDDAn should be paralleled with ground through a 0.1 µF capacitor. Power Ground - VDD_DIFF: 3.3 V Power Supply for OUT GND_DIFF: Ground for OUT1 Pin Description 15 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL Table 1: Pin Description (Continued) Name Pin No. I/O Type Others IC1 IC2 IC3 IC4 IC5 IC6 NC 2 16 60 61 62 63 27 IC: Internal Connected Internal Use. These pins should be left open for normal operation. Description 1 - - NC: Not Connected Note: 1. All the unused input pins should be connected to ground; the output of all the unused output pins are don’t-care. 2. The contents in the brackets indicate the position of the register bit/bits. 3. N x 8 kHz: 1 < N < 19440. 4. N x E1: N = 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64. 5. N x T1: N = 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96. 6. N x 13.0 MHz: N = 1, 2, 4. 7. N x 3.84 MHz: N = 1, 2, 4, 8, 16, 10, 20, 40. Pin Description 16 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3 3.1 FUNCTIONAL DESCRIPTION RESET 3.2 MASTER CLOCK The reset operation resets all registers and state machines to their default value or status. After power on, the device must be reset for normal operation. For a complete reset, the RST pin must be asserted low for at least 50 µs. After the RST pin is pulled high, the device will still be in reset state for 500 ms (typical). If the RST pin is held low continuously, the device remains in reset state. A nominal 12.8000 MHz clock, provided by a crystal oscillator, is input on the OSCI pin. This clock is provided for the device as a master clock. The master clock is used as a reference clock for all the internal circuits. A better active edge of the master clock is selected by the OSC_EDGE bit to improve jitter and wander performance. In fact, an offset from the nominal frequency may input on the OSCI pin. This offset can be compensated by setting the NOMINAL_FREQ_VALUE[23:0] bits. The calibration range is within ±741 ppm. The performance of the master clock should meet GR-1244-CORE, GR-253-CORE, ITU-T G.812 and G.813 criteria. Table 2: Related Bit / Register in Chapter 3.2 Bit NOMINAL_FREQ_VALUE[23:0] OSC_EDGE Register NOMINAL_FREQ[23:16]_CNFG, NOMINAL_FREQ[15:8]_CNFG, NOMINAL_FREQ[7:0]_CNFG DIFFERENTIAL_IN_OUT_OSCI_CNFG Address (Hex) 06, 05, 04 0A Functional Description 17 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.3 3.3.1 INPUT CLOCKS & FRAME SYNC SIGNALS INPUT CLOCKS Altogether 5 clocks and 3 frame sync signals are input to the device. The device provides 5 input clock ports. According to the input port technology, the input ports support the following technologies: • PECL/LVDS • CMOS According to the input clock source, the following clock sources are supported: • T1: Recovered clock from STM-N or OC-n • T2: PDH network synchronization timing • T3: External synchronization reference timing IN1_CMOS ~ IN3_CMOS support CMOS input signal only and the clock sources can be from T1, T2 or T3. IN1_DIFF and IN2_DIFF support PECL/LVDS input signal and automatically detect whether the signal is PECL or LVDS. The clock sources can be from T1, T2 or T3. For SDH and SONET networks, the default frequency is different. SONET / SDH frequency selection is controlled by the IN_SONET_SDH bit. During reset, the default value of the IN_SONET_SDH bit is determined by the SONET/SDH pin: high for SONET and low for SDH. After reset, the input signal on the SONET/SDH pin takes no effect. IDT82V3358 supports single-ended input for differential input. Refer to Chapter 8.3.2.3 Single-Ended Input for Differential Input. 3.3.2 FRAME SYNC INPUT SIGNALS Three 2 kHz, 4 kHz or 8 kHz frame sync signals are input on the EX_SYNC1 to EX_SYNC3 pins respectively. They are CMOS inputs. The input frequency should match the setting in the SYNC_FREQ[1:0] bits. Only one of the three frame sync input signals is used for frame sync output signal synchronization. Refer to Chapter 3.13.2 Frame SYNC Output Signals for details. Table 3: Related Bit / Register in Chapter 3.3 Bit IN_SONET_SDH SYNC_FREQ[1:0] Register INPUT_MODE_CNFG Address (Hex) 09 Functional Description 18 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.4 INPUT CLOCK PRE-DIVIDER Each input clock is assigned an internal Pre-Divider. The Pre-Divider is used to divide the clock frequency down to the DPLL required frequency, which is no more than 38.88 MHz.For each input clock, the DPLL required frequency is set by the corresponding IN_FREQ[3:0] bits If the input clock is of 2 kHz, 4 kHz or 8 kHz, the Pre-Divider is bypassed automatically and the corresponding IN_FREQ[3:0] bits should be set to match the input frequency; the input clock can be inverted, as determined by the IN_2K_4K_8K_INV bit. Each Pre-Divider consists of a HF (High Frequency) Divider (only available for IN1_DIFF and IN2_DIFF), a DivN Divider and a Lock 8k Divider, as shown in Figure 3. The HF Divider, which is only available for IN1_DIFF and IN2_DIFF, should be used when the input clock is higher than (>) 155.52 MHz. The input clock can be divided by 4, 5 or can bypass the HF Divider, as determined by the IN1_DIFF_DIV[1:0]/IN2_DIFF_DIV[1:0] bits correspondingly. Either the DivN Divider or the Lock 8k Divider can be used or both can be bypassed, as determined by the DIRECT_DIV bit and the LOCK_8K bit. When the DivN Divider is used, the division factor setting should observe the following order: 1. Select an input clock by the PRE_DIV_CH_VALUE[3:0] bits; 2. Write the lower eight bits of the division factor to the PRE_DIVN_VALUE[7:0] bits; 3. Write the higher eight bits of the division factor to the PRE_DIVN_VALUE[14:8] bits. Pre-Divider IN1_DIFF_DIV[1:0] bits / IN2_DIFF_DIV[1:0] bits input clock HF Divider (for IN1_DIFF & IN2_DIFF only) Once the division factor is set for the input clock selected by the PRE_DIV_CH_VALUE[3:0] bits, it is valid until a different division factor is set for the same input clock. The division factor is calculated as follows: Division Factor = (the frequency of the clock input to the DivN Divider ÷ the frequency of the DPLL required clock set by the IN_FREQ[3:0] bits) - 1 The DivN Divider can only divide the input clock whose frequency is lower than () ±500 ppm with respect to the master clock within a 128 ms period. There are four configurations (0 - 3) for a leaky bucket accumulator. The leaky bucket configuration for an input clock is selected by the cor- responding BUCKET_SEL[1:0] bits. Each leaky bucket configuration consists of four elements: upper threshold, lower threshold, bucket size and decay rate. The bucket size is the capability of the accumulator. If the number of the accumulated events reach the bucket size, the accumulator will stop increasing even if further events are detected. The upper threshold is a point above which a no-activity alarm is raised. The lower threshold is a point below which the no-activity alarm is cleared. The decay rate is a certain period during which the accumulator decreases by 1 if no event is detected. The leaky bucket configuration is programmed by one of four groups of register bits: the BUCKET_SIZE_n_DATA[7:0] bits, the UPPER_ THRESHOLD_n_DATA[7:0] bits, the LOWER_THRESHOLD_n_ DATA[7:0] bits and the DECAY_RATE_n_DATA[1:0] bits respectively; ‘n’ is 0 ~ 3. The no-activity alarm status of the input clock is indicated by the INn_CMOS_NO_ACTIVITY_ALARM bit (n = 1, 2, or 3) / INn_DIFF_NO_ACTIVITY_ALARM bit (n = 1 or 2). The input clock with a no-activity alarm is disqualified for clock selection for T0/T4 DPLL. clock signal with no event clock signal with events Input Clock Decay Rate Leaky Bucket Accumulator Bucket Size Upper Threshold Lower Threshold 0 No-activity Alarm Indication Figure 4. Input Clock Activity Monitoring Functional Description 20 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.5.2 FREQUENCY MONITORING Frequency is monitored by comparing the input clock with a reference clock. The reference clock can be derived from the master clock or the output of T0 DPLL, as determined by the FREQ_MON_CLK bit. A frequency hard alarm threshold is set for frequency monitoring. If the FREQ_MON_HARD_EN bit is ‘1’, a frequency hard alarm is raised when the frequency of the input clock with respect to the reference clock is above the threshold; the alarm is cleared when the frequency is below the threshold. The frequency hard alarm threshold can be calculated as follows: Frequency Hard Alarm Threshold (ppm) = (ALL_FREQ_HARD_ THRESHOLD[3:0] + 1) X FREQ_MON_FACTOR[3:0] The input clock with a frequency hard alarm is disqualified for clock selection for T0/T4 DPLL. In addition, if the input clock is 2 kHz, 4 kHz or 8 kHz, its clock edges with respect to the reference clock are monitored. If any edge drifts outside ±5%, the input clock is disqualified for clock selection for T0/T4 DPLL. The input clock is qualified if any edge drifts inside ±5%. This function is supported only when the IN_NOISE_WINDOW bit is ‘1’. The frequency of each input clock with respect to the reference clock can be read by doing the following step by step: 1. Select an input clock by setting the IN_FREQ_READ_CH[3:0] bits; 2. Read the value in the IN_FREQ_VALUE[7:0] bits and calculate as follows: Input Clock Frequency (ppm) = IN_FREQ_VALUE[7:0] X FREQ_MON_FACTOR[3:0] If the FREQ_MON_HARD_EN bit is ‘1’, the frequency hard alarm status of the input clock is indicated by the INn_CMOS_FREQ_HARD_ALARM bit (n = 1, 2 or 3) / INn_DIFF_FREQ_HARD_ALARM bit (n = 1 or 2). When the FREQ_MON_HARD_EN bit is ‘0’, no frequency hard alarm is raised even if the input clock is above the frequency hard alarm threshold. Table 5: Related Bit / Register in Chapter 3.5 Bit BUCKET_SIZE_n_DATA[7:0] (3 ≥ n ≥ 0) UPPER_THRESHOLD_n_DATA[7:0] (3 ≥ n ≥ 0) LOWER_THRESHOLD_n_DATA[7:0] (3 ≥ n ≥ 0) DECAY_RATE_n_DATA[1:0] (3 ≥ n ≥ 0) BUCKET_SEL[1:0] INn_CMOS_NO_ACTIVITY_ALARM (n = 1, 2, or 3) INn_CMOS_FREQ_HARD_ALARM (n = 1, 2 or 3) INn_DIFF_NO_ACTIVITY_ALARM (n = 1 or 2) INn_DIFF_FREQ_HARD_ALARM (n = 1 or 2) FREQ_MON_CLK FREQ_MON_HARD_EN ALL_FREQ_HARD_THRESHOLD[3:0] FREQ_MON_FACTOR[3:0] IN_NOISE_WINDOW IN_FREQ_READ_CH[3:0] IN_FREQ_VALUE[7:0] Note that the value set by the FREQ_MON_FACTOR[3:0] bits depends on the application. Register BUCKET_SIZE_0_CNFG ~ BUCKET_SIZE_3_CNFG UPPER_THRESHOLD_0_CNFG ~ UPPER_THRESHOLD_3_CNFG LOWER_THRESHOLD_0_CNFG ~ LOWER_THRESHOLD_3_CNFG DECAY_RATE_0_CNFG ~ DECAY_RATE_3_CNFG IN1_CMOS_CNFG, IN2_CMOS_CNFG, IN1_DIFF_CNFG, IN2_DIFF_CNFG, IN3_CMOS_CNFG IN1_IN2_CMOS_STS, IN3_CMOS_STS IN1_IN2_DIFF_STS MON_SW_PBO_CNFG ALL_FREQ_MON_THRESHOLD_CNFG FREQ_MON_FACTOR_CNFG PHASE_MON_PBO_CNFG IN_FREQ_READ_CH_CNFG IN_FREQ_READ_STS Address (Hex) 33, 37, 3B, 3F 31, 35, 39, 3D 32, 36, 3A, 3E 34, 38, 3C, 40 16, 17, 19, 1A, 1D 44, 47 45 0B 2F 2E 78 41 42 Functional Description 21 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.6 T0 / T4 DPLL INPUT CLOCK SELECTION An input clock is selected for T0 DPLL and for T4 DPLL respectively. For T0 path, the EXT_SW bit and the T0_INPUT_SEL[3:0] bits determine the input clock selection, as shown in Table 6: Table 6: Input Clock Selection for T0 Path Control Bits EXT_SW 1 0 T0_INPUT_SEL[3:0] don’t-care other than 0000 0000 Input Clock Selection External Fast selection Forced selection Automatic selection Automatic selection is done based on the results of input clocks quality monitoring and the related registers configuration. The selected input clock is attempted to be locked in T0/T4 DPLL. 3.6.1 EXTERNAL FAST SELECTION (T0 ONLY) The External Fast selection is supported by T0 path only. In External Fast selection, only IN1_CMOS/IN1_DIFF and IN2_CMOS/IN2_DIFF pairs are available for selection. Refer to Figure 5. The results of input clocks quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring) do not affect input clock selection. The T0 input clock selection is determined by the FF_SRCSW pin after reset (this pin determines the default value of the EXT_SW bit during reset, refer to Chapter 2 Pin Description), the IN1_CMOS_SEL_PRIORITY[3:0] bits and the IN2_CMOS_SEL_PRIORITY[3:0] bits, as shown in Figure 5 and Table 8: IN1_CMOS_SEL_PRIORITY[3:0] bits FF_SRCSW pin For T4 path, the T4 DPLL may lock to a T0 DPLL output or lock independently from T0 path, as determined by the T4_LOCK_T0 bit. When the T4 DPLL locks to the T0 DPLL output, the T4 selected input clock is a 77.76 MHz or 8 kHz signal from the T0 DPLL 77.76 MHz path (refer to Chapter 3.11.5.1 T0 Path), as determined by the T0_FOR_T4 bit. When the T4 path locks independently from the T0 path, the T4 DPLL input clock selection is determined by the T4_INPUT_SEL[3:0] bits. Refer to Table 7: Table 7: Input Clock Selection for T4 Path Control Bits - T4_INPUT_SEL[3:0] other than 0000 0000 Input Clock Selection Forced selection Automatic selection IN1_CMOS IN1_DIFF attempted to be locked in T0 DPLL IN2_CMOS IN2_DIFF External Fast selection is done between IN1_CMOS/IN1_DIFF and IN2_CMOS/IN2_DIFF pairs. Forced selection is done by setting the related registers. Table 8: External Fast Selection Control Pin & Bits FF_SRCSW (after reset) high low IN1_CMOS_SEL_PRIORITY[3:0] 0000 other than 0000 don’t-care IN2_CMOS_SEL_PRIORITY[3:0] bits Figure 5. External Fast Selection IN2_CMOS_SEL_PRIORITY[3:0] don’t-care 0000 other than 0000 the Selected Input Clock IN1_DIFF IN1_CMOS IN2_DIFF IN2_CMOS Functional Description 22 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.6.2 FORCED SELECTION In Forced selection, the selected input clock is set by the T0_INPUT_SEL[3:0] / T4_INPUT_SEL[3:0] bits. The results of input clocks quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring) do not affect the input clock selection. 3.6.3 AUTOMATIC SELECTION In Automatic selection, the input clock selection is determined by its validity and priority. The validity depends on the results of input clock quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring). In all the qualified input clocks, the one with the highest priority is selected. The priority is configured by the corresponding INn_CMOS_SEL_PRIORITY[3:0] bits (n = 1, 2 or 3) / the Table 10: Related Bit / Register in Chapter 3.6 Bit EXT_SW T0_INPUT_SEL[3:0] T4_LOCK_T0 T0_FOR_T4 T4_INPUT_SEL[3:0] INn_CMOS_SEL_PRIORITY[3:0] (n = 1, 2 or 3) INn_DIFF_SEL_PRIORITY[3:0] (n = 1 or 2) T4_T0_SEL INn_DIFF_SEL_PRIORITY[3:0] bits (n = 1 or 2). If more than one qualified input clock is available and has the same priority, the input clock with the smallest ‘n’ is selected. See Table 9 for the ‘n’ assigned to the input clock. Table 9: ‘n’ Assigned to the Input Clock Input Clock IN1_CMOS IN1_DIFF IN2_CMOS IN2_DIFF IN3_CMOS ‘n’ Assigned to the Input Clock 1 2 3 4 5 Register MON_SW_PBO_CNFG T0_INPUT_SEL_CNFG T4_INPUT_SEL_CNFG IN1_IN2_CMOS_SEL_PRIORITY_CNFG, IN3_CMOS_SEL_PRIORITY_CNFG IN1_IN2_DIFF_SEL_PRIORITY_CNFG T4_T0_REG_SEL_CNFG Address (Hex) 0B 50 51 27 *, 2A * 28 * 07 Note: * The setting in the 27, 28 and 2A registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 23 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.7 SELECTED INPUT CLOCK MONITORING 3.7.1.3 Fine Phase Loss The quality of the selected input clock is always monitored (refer to Chapter 3.5 Input Clock Quality Monitoring) and the DPLL locking status is always monitored. 3.7.1 T0 / T4 DPLL LOCKING DETECTION The following events is always monitored: • Fast Loss; • Coarse Phase Loss; • Fine Phase Loss; • Hard Limit Exceeding. 3.7.1.1 Fast Loss A fast loss is triggered when the selected input clock misses 2 consecutive clock cycles. It is cleared once an active clock edge is detected. For T0 path, the occurrence of the fast loss will result in T0 DPLL unlocked if the FAST_LOS_SW bit is ‘1’. For T4 path, the occurrence of the fast loss will result in T4 DPLL unlocked regardless of the FAST_LOS_SW bit. 3.7.1.2 Coarse Phase Loss The T0/T4 DPLL compares the selected input clock with the feedback signal. If the phase-compared result exceeds the coarse phase limit, a coarse phase loss is triggered. It is cleared once the phase-compared result is within the coarse phase limit. When the selected input clock is of 2 kHz, 4 kHz or 8 kHz, the coarse phase limit depends on the MULTI_PH_8K_4K_2K_EN bit, the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits. Refer to Table 11. When the selected input clock is of other frequencies but 2 kHz, 4 kHz and 8 kHz, the coarse phase limit depends on the WIDE_EN bit and the PH_LOS_COARSE_LIMT[3:0] bits. Refer to Table 12. Table 11: Coarse Phase Limit Programming (the selected input clock of 2 kHz, 4 kHz or 8 kHz) MULTI_PH_8K_4K WIDE_EN _2K_EN 0 1 Coarse Phase Limit The T0/T4 DPLL compares the selected input clock with the feedback signal. If the phase-compared result exceeds the fine phase limit programmed by the PH_LOS_FINE_LIMT[2:0] bits, a fine phase loss is triggered. It is cleared once the phase-compared result is within the fine phase limit. The occurrence of the fine phase loss will result in T0/T4 DPLL unlocked if the FINE_PH_LOS_LIMT_EN bit is ‘1’. 3.7.1.4 Hard Limit Exceeding Two limits are available for this monitoring. They are DPLL soft limit and DPLL hard limit. When the frequency of the DPLL output with respect to the master clock exceeds the DPLL soft / hard limit, a DPLL soft / hard alarm will be raised; the alarm is cleared once the frequency is within the corresponding limit. The occurrence of the DPLL soft alarm does not affect the T0/T4 DPLL locking status. The DPLL soft alarm is indicated by the corresponding T0_DPLL_SOFT_FREQ_ALARM / T4_DPLL_SOFT_FREQ_ALARM bit. The occurrence of the DPLL hard alarm will result in T0/T4 DPLL unlocked if the FREQ_LIMT_PH_LOS bit is ‘1’. The DPLL soft limit is set by the DPLL_FREQ_SOFT_LIMT[6:0] bits and can be calculated as follows: DPLL Soft Limit (ppm) = DPLL_FREQ_SOFT_LIMT[6:0] X 0.724 The DPLL hard limit is set by the DPLL_FREQ_HARD_LIMT[15:0] bits and can be calculated as follows: DPLL Hard Limit (ppm) = DPLL_FREQ_HARD_LIMT[15:0] X 0.0014 3.7.2 LOCKING STATUS don’t-care ±1 UI 0 ±1 UI 1 set by the PH_LOS_COARSE_LIMT[3:0] bits The DPLL locking status depends on the locking monitoring results. The DPLL is in locked state if none of the following events is triggered during 2 seconds; otherwise, the DPLL is unlocked. • Fast Loss (the FAST_LOS_SW bit is ‘1’); • Coarse Phase Loss (the COARSE_PH_LOS_LIMT_EN bit is ‘1’); • Fine Phase Loss (the FINE_PH_LOS_LIMT_EN bit is ‘1’); • DPLL Hard Alarm (the FREQ_LIMT_PH_LOS bit is ‘1’). If the FAST_LOS_SW bit, the COARSE_PH_LOS_LIMT_EN bit, the FINE_PH_LOS_LIMT_EN bit or the FREQ_LIMT_PH_LOS bit is ‘0’, the DPLL locking status will not be affected even if the corresponding event is triggered. If all these bits are ‘0’, the DPLL will be in locked state in 2 seconds. The DPLL locking status is indicated by the T0_DPLL_LOCK / T4_DPLL_LOCK bit. The T4_STS 1 bit will be set when the locking status of the T4 DPLL changes (from ‘lock’ to ‘unlock’ or from ‘unlock’ to ‘lock’). If the T4_STS 2 bit is ‘1’, an interrupt will be generated. Table 12: Coarse Phase Limit Programming (the selected input clock of other than 2 kHz, 4 kHz and 8 kHz) WIDE_EN 0 1 Coarse Phase Limit ±1 UI set by the PH_LOS_COARSE_LIMT[3:0] bits The occurrence of the coarse phase loss will result in T0/T4 DPLL unlocked if the COARSE_PH_LOS_LIMT_EN bit is ‘1’. Functional Description 24 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.7.3 PHASE LOCK ALARM (T0 ONLY) A phase lock alarm will be raised when the selected input clock can not be locked in T0 DPLL within a certain period. This period can be calculated as follows: Period (sec.) = TIME_OUT_VALUE[5:0] X MULTI_FACTOR[1:0] The phase lock alarm is indicated by the corresponding INn_CMOS_PH_LOCK_ALARM bit (n = 1, 2 or 3) / INn_DIFF_PH_LOCK_ALARM bit (n = 1 or 2). The phase lock alarm can be cleared by the following two ways, as selected by the PH_ALARM_TIMEOUT bit: Table 13: Related Bit / Register in Chapter 3.7 Bit FAST_LOS_SW PH_LOS_FINE_LIMT[2:0] FINE_PH_LOS_LIMT_EN MULTI_PH_8K_4K_2K_EN WIDE_EN PH_LOS_COARSE_LIMT[3:0] COARSE_PH_LOS_LIMT_EN T0_DPLL_SOFT_FREQ_ALARM T4_DPLL_SOFT_FREQ_ALARM T0_DPLL_LOCK T4_DPLL_LOCK DPLL_FREQ_SOFT_LIMT[6:0] FREQ_LIMT_PH_LOS DPLL_FREQ_HARD_LIMT[15:0] T4_STS 1 T4_STS TIME_OUT_VALUE[5:0] MULTI_FACTOR[1:0] INn_CMOS_PH_LOCK_ALARM (n = 1, 2, or 3) INn_DIFF_PH_LOCK_ALARM (n = 1 or 2) PH_ALARM_TIMEOUT T4_T0_SEL 2 • Be cleared when a ‘1’ is written to the corresponding INn_CMOS_PH_LOCK_ALARM / INn_DIFF_PH_LOCK_ ALARM bit; • Be cleared after the period (= TIME_OUT_VALUE[5:0] X MULTI_FACTOR[1:0] in second) which starts from when the alarm is raised. The selected input clock with a phase lock alarm is disqualified for T0 DPLL locking. Note that no phase lock alarm is raised if the T4 selected input clock can not be locked. Register PHASE_LOSS_FINE_LIMIT_CNFG Address (Hex) 5B * PHASE_LOSS_COARSE_LIMIT_CNFG 5A * OPERATING_STS 52 DPLL_FREQ_SOFT_LIMIT_CNFG DPLL_FREQ_HARD_LIMIT[15:8]_CNFG, DPLL_FREQ_HARD_LIMIT[7:0]_CNFG INTERRUPTS3_STS INTERRUPTS3_ENABLE_CNFG PHASE_ALARM_TIME_OUT_CNFG IN1_IN2_CMOS_STS, IN3_CMOS_STS IN1_IN2_DIFF_STS INPUT_MODE_CNFG T4_T0_REG_SEL_CNFG 65 67, 66 0F 12 08 44, 47 45 09 07 Note: * The setting in the 5A and 5B registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit. Functional Description 25 May 19, 2009 IDT82V3358 SYNCHRONOUS ETHERNET WAN PLL 3.8 SELECTED INPUT CLOCK SWITCH 3.8.2 SELECTED INPUT CLOCK SWITCH If the input clock is selected by External Fast selection or by Forced selection, it can be switched by setting the related registers (refer to Chapter 3.6.1 External Fast Selection (T0 only) & Chapter 3.6.2 Forced Selection) any time. In this case, whether the input clock is qualified for DPLL locking does not affect the clock switch. If the T4 selected input clock is a T0 DPLL output, it can only be switched by setting the T0_FOR_T4 bit. When the input clock is selected by Automatic selection, the input clock switch depends on its validity and priority. If the current selected input clock is disqualified, a new qualified input clock may be switched to. 3.8.1 INPUT CLOCK VALIDITY For all the input clocks, the validity depends on the results of input clock quality monitoring (refer to Chapter 3.5 Input Clock Quality Monitoring). When all of the following conditions are satisfied, the input clock is valid; otherwise, it is invalid. • No no-activity alarm (the INn_CMOS_NO_ACTIVITY_ALARM / INn_DIFF_NO_ACTIVITY_ALARM bit is ‘0’); • No frequency hard alarm (the INn_CMOS_FREQ_HARD_ ALARM / INn_DIFF_FREQ_HARD_ALARM bit is ‘0’); • If the IN_NOISE_WINDOW bit is ‘1’, all the edges of the input clock of 2 kHz, 4 kHz or 8 kHz drift inside ±5%; if the IN_NOISE_WINDOW bit is ‘0’, this condition is ignored. The validity qualification of the T0 selected input clock is different from that of the T4 selected input clock. The validity qualification of the T4 selected input clock is the same as the above. The T0 selected input clock is valid when all of the above and the following conditions are satisfied; otherwise, it is invalid. • No phase lock alarm, i.e., the INn_CMOS_PH_LOCK_ALARM / INn_DIFF_PH_LOCK_ALARM bit is ‘0’; • If the ULTR_FAST_SW bit is ‘1’, the T0 selected input clock misses less than (