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 ......................................................................................................................................... 18
3.1 RESET ........................................................................................................................................................................................................... 18
3.2 MASTER CLOCK .......................................................................................................................................................................................... 18
3.3 INPUT CLOCKS & FRAME SYNC SIGNAL ................................................................................................................................................. 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 T0 / T4 DPLL INPUT CLOCK SELECTION .................................................................................................................................................. 23
3.6.1 External Fast Selection (T0 only) .................................................................................................................................................. 23
3.6.2 Forced Selection ............................................................................................................................................................................ 24
3.6.3 Automatic Selection ....................................................................................................................................................................... 24
3.7 SELECTED INPUT CLOCK MONITORING .................................................................................................................................................. 25
3.7.1 T0 / T4 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 (T0 only) .......................................................................................................................................................... 26
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 (T0 only) ........................................................................................................................................ 28
3.8.3 Selected / Qualified Input Clocks Indication ................................................................................................................................ 28
3.9 SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE ....................................................................................................... 29
3.9.1 T0 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 29
3.9.2 T4 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 31
3.10 T0 / T4 DPLL OPERATING MODE ............................................................................................................................................................... 32
3.10.1 T0 DPLL Operating Mode .............................................................................................................................................................. 32
3.10.1.1 Free-Run Mode ................................................................................................................................................................ 32
3.10.1.2 Pre-Locked Mode ............................................................................................................................................................. 32
3.10.1.3 Locked Mode .................................................................................................................................................................... 32
3.10.1.3.1 Temp-Holdover Mode .................................................................................................................................... 32
Table of Contents
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December 9, 2008
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