Table of Contents
3
June 19, 2006
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 .........................................................................................................................................19
3.1
RESET ...........................................................................................................................................................................................................19
3.2
MASTER CLOCK ..........................................................................................................................................................................................19
3.3
INPUT CLOCKS & FRAME SYNC SIGNAL .................................................................................................................................................20
3.3.1
Input Clocks .................................................................................................................................................................................... 20
3.3.2
Frame SYNC Input Signals ............................................................................................................................................................ 20
3.4
INPUT CLOCK PRE-DIVIDER ......................................................................................................................................................................21
3.5
INPUT CLOCK QUALITY MONITORING .....................................................................................................................................................23
3.5.1
LOS Monitoring .............................................................................................................................................................................. 23
3.5.2
Activity Monitoring ......................................................................................................................................................................... 23
3.5.3
Frequency Monitoring ................................................................................................................................................................... 24
3.6
T0 / T4 DPLL INPUT CLOCK SELECTION ..................................................................................................................................................25
3.6.1
External Fast Selection (T0 only) .................................................................................................................................................. 25
3.6.2
Forced Selection ............................................................................................................................................................................ 26
3.6.3
Automatic Selection ....................................................................................................................................................................... 26
3.7
SELECTED INPUT CLOCK MONITORING ..................................................................................................................................................27
3.7.1
T0 / T4 DPLL Locking Detection ................................................................................................................................................... 27
3.7.1.1
Fast Loss .......................................................................................................................................................................... 27
3.7.1.2
Coarse Phase Loss .......................................................................................................................................................... 27
3.7.1.3
Fine Phase Loss ............................................................................................................................................................... 27
3.7.1.4
Hard Limit Exceeding ....................................................................................................................................................... 27
3.7.2
Locking Status ............................................................................................................................................................................... 27
3.7.3
Phase Lock Alarm (T0 only) .......................................................................................................................................................... 28
3.8
SELECTED INPUT CLOCK SWITCH ...........................................................................................................................................................29
3.8.1
Input Clock Validity ........................................................................................................................................................................ 29
3.8.2
Selected Input Clock Switch ......................................................................................................................................................... 29
3.8.2.1
Revertive Switch ............................................................................................................................................................... 29
3.8.2.2
Non-Revertive Switch (T0 only) ........................................................................................................................................ 30
3.8.3
Selected / Qualified Input Clocks Indication ................................................................................................................................ 30
3.9
SELECTED INPUT CLOCK STATUS VS. DPLL OPERATING MODE .......................................................................................................31
3.9.1
T0 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 31
3.9.2
T4 Selected Input Clock vs. DPLL Operating Mode .................................................................................................................... 33
3.10 T0 / T4 DPLL OPERATING MODE ...............................................................................................................................................................34
3.10.1 T0 DPLL Operating Mode .............................................................................................................................................................. 34
3.10.1.1 Free-Run Mode ................................................................................................................................................................ 34
3.10.1.2 Pre-Locked Mode ............................................................................................................................................................. 34
3.10.1.3 Locked Mode .................................................................................................................................................................... 34
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