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IDT82V32021NLGBLANK Datasheet(PDF) 3 Page - Integrated Device Technology |
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IDT82V32021NLGBLANK Datasheet(HTML) 3 Page - Integrated Device Technology |
3 / 108 page Table of Contents 3 July 23, 2009 FEATURES.............................................................................................................................................................................. 8 HIGHLIGHTS.................................................................................................................................................................................................... 8 MAIN FEATURES ............................................................................................................................................................................................ 8 OTHER FEATURES......................................................................................................................................................................................... 8 APPLICATIONS....................................................................................................................................................................... 8 DESCRIPTION......................................................................................................................................................................... 9 FUNCTIONAL BLOCK DIAGRAM ........................................................................................................................................ 10 1 PIN ASSIGNMENT ........................................................................................................................................................... 11 2 PIN DESCRIPTION .......................................................................................................................................................... 12 3 FUNCTIONAL DESCRIPTION ......................................................................................................................................... 16 3.1 RESET ........................................................................................................................................................................................................... 16 3.2 MASTER CLOCK .......................................................................................................................................................................................... 16 3.3 INPUT CLOCKS & FRAME SYNC SIGNALS ............................................................................................................................................... 17 3.3.1 Input Clocks .................................................................................................................................................................................... 17 3.3.2 Frame SYNC Input Signals ............................................................................................................................................................ 17 3.4 INPUT CLOCK PRE-DIVIDER ...................................................................................................................................................................... 18 3.5 INPUT CLOCK QUALITY MONITORING ..................................................................................................................................................... 19 3.5.1 Activity Monitoring ......................................................................................................................................................................... 19 3.5.2 Frequency Monitoring ................................................................................................................................................................... 20 3.6 DPLL INPUT CLOCK SELECTION .............................................................................................................................................................. 21 3.6.1 External Fast Selection .................................................................................................................................................................. 21 3.6.2 Forced Selection ............................................................................................................................................................................ 22 3.6.3 Automatic Selection ....................................................................................................................................................................... 22 3.7 SELECTED INPUT CLOCK MONITORING .................................................................................................................................................. 23 3.7.1 DPLL Locking Detection ................................................................................................................................................................ 23 3.7.1.1 Fast Loss .......................................................................................................................................................................... 23 3.7.1.2 Coarse Phase Loss .......................................................................................................................................................... 23 3.7.1.3 Fine Phase Loss ............................................................................................................................................................... 23 3.7.1.4 Hard Limit Exceeding ....................................................................................................................................................... 23 3.7.2 Locking Status ............................................................................................................................................................................... 23 3.7.3 Phase Lock Alarm .......................................................................................................................................................................... 23 3.8 SELECTED INPUT CLOCK SWITCH ........................................................................................................................................................... 25 3.8.1 Input Clock Validity ........................................................................................................................................................................ 25 3.8.2 Selected Input Clock Switch ......................................................................................................................................................... 25 3.8.2.1 Revertive Switch ............................................................................................................................................................... 25 3.8.2.2 Non-Revertive Switch ....................................................................................................................................................... 25 3.8.3 Selected / Qualified Input Clocks Indication ................................................................................................................................ 25 3.9 SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE ....................................................................................................... 27 3.10 DPLL OPERATING MODE ........................................................................................................................................................................... 29 3.10.1 Six Operating Modes ..................................................................................................................................................................... 29 3.10.1.1 Free-Run Mode ................................................................................................................................................................ 29 3.10.1.2 Pre-Locked Mode ............................................................................................................................................................. 29 3.10.1.3 Locked Mode .................................................................................................................................................................... 29 3.10.1.3.1 Temp-Holdover Mode .................................................................................................................................... 29 3.10.1.4 Lost-Phase Mode ............................................................................................................................................................. 29 3.10.1.5 Holdover Mode ................................................................................................................................................................. 29 Table of Contents |
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