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 .......................................................................................................................................................... 14
3 FUNCTIONAL DESCRIPTION ......................................................................................................................................... 18
3.1 RESET ........................................................................................................................................................................................................... 18
3.2 MASTER CLOCK .......................................................................................................................................................................................... 18
3.3 INPUT CLOCKS & FRAME SYNC SIGNALS ............................................................................................................................................... 19
3.3.1 Input Clocks .................................................................................................................................................................................... 19
3.3.2 Frame SYNC Input Signals ............................................................................................................................................................ 19
3.4 INPUT CLOCK PRE-DIVIDER ...................................................................................................................................................................... 20
3.5 INPUT CLOCK QUALITY MONITORING ..................................................................................................................................................... 21
3.5.1 Activity Monitoring ......................................................................................................................................................................... 21
3.5.2 Frequency Monitoring ................................................................................................................................................................... 22
3.6 DPLL INPUT CLOCK SELECTION .............................................................................................................................................................. 23
3.6.1 External Fast Selection .................................................................................................................................................................. 23
3.6.2 Forced Selection ............................................................................................................................................................................ 24
3.6.3 Automatic Selection ....................................................................................................................................................................... 24
3.7 SELECTED INPUT CLOCK MONITORING .................................................................................................................................................. 25
3.7.1 DPLL Locking Detection ................................................................................................................................................................ 25
3.7.1.1 Fast Loss .......................................................................................................................................................................... 25
3.7.1.2 Coarse Phase Loss .......................................................................................................................................................... 25
3.7.1.3 Fine Phase Loss ............................................................................................................................................................... 25
3.7.1.4 Hard Limit Exceeding ....................................................................................................................................................... 25
3.7.2 Locking Status ............................................................................................................................................................................... 25
3.7.3 Phase Lock Alarm .......................................................................................................................................................................... 25
3.8 SELECTED INPUT CLOCK SWITCH ........................................................................................................................................................... 27
3.8.1 Input Clock Validity ........................................................................................................................................................................ 27
3.8.2 Selected Input Clock Switch ......................................................................................................................................................... 27
3.8.2.1 Revertive Switch ............................................................................................................................................................... 27
3.8.2.2 Non-Revertive Switch ....................................................................................................................................................... 27
3.8.3 Selected / Qualified Input Clocks Indication ................................................................................................................................ 27
3.9 SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE ....................................................................................................... 29
3.10 DPLL OPERATING MODE ........................................................................................................................................................................... 31
3.10.1 Six Operating Modes ..................................................................................................................................................................... 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
3.10.1.4 Lost-Phase Mode ............................................................................................................................................................. 31
3.10.1.5 Holdover Mode ................................................................................................................................................................. 31
Table of Contents
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September 11, 2009
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