ACS8515P データシートの表示（PDF） - Semtech Corporation
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ACS8515P Datasheet PDF : 50 Pages
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ACS8515 Rev2.1 LC/P
ADVANCED COMMUNICATIONS
Table of Contents
FINAL
List of Sections
Description ................................................................................................................................................................................................ 1
Block Diagram ........................................................................................................................................................................................... 1
Features ..................................................................................................................................................................................................... 1
Table of Contents ...................................................................................................................................................................................... 2
Pin Diagram ............................................................................................................................................................................................... 4
Pin Descriptions ........................................................................................................................................................................................ 5
Functional Description ............................................................................................................................................................................. 7
Local Oscillator Clock ..................................................................................................................................................................................... 7
Crystal Frequency Calibration ........................................................................................................................................................ 7
Input Reference Clock Ports ......................................................................................................................................................................... 8
Input Wander and Jitter Tolerance ............................................................................................................................................................ 10
Output Clock Ports ........................................................................................................................................................................................ 11
Low Speed Output Clock ................................................................................................................................................................ 11
High Speed Output Clock .............................................................................................................................................................. 12
Frame Sync and Multi-Frame Sync Clocks ................................................................................................................................ 12
Low Jitter Multiple E1/DS1 Outputs ........................................................................................................................................... 12
Output Wander and Jitter ............................................................................................................................................................................ 13
Phase Variation ............................................................................................................................................................................................. 14
Phase Build Out ............................................................................................................................................................................................. 16
Microprocessor Interface ............................................................................................................................................................................. 16
Register Set ..................................................................................................................................................................................... 16
Configuration Registers ................................................................................................................................................................. 16
Status Registers .............................................................................................................................................................................. 16
Register Access ............................................................................................................................................................................... 17
Interrupt Enable and Clear ......................................................................................................................................................................... 17
Register Map .................................................................................................................................................................................................. 18
Register Map Description ........................................................................................................................................................................... 21
Selection of Input Reference Clock Source ............................................................................................................................................. 29
Automatic Control Selection ........................................................................................................................................................ 29
Ultra Fast Switching ....................................................................................................................................................................... 30
External Protection Switching ..................................................................................................................................................... 30
Activity Monitoring ....................................................................................................................................................................................... 30
Modes of Operation ...................................................................................................................................................................................... 32
Free-run Mode ................................................................................................................................................................................. 32
Pre-Locked Mode ............................................................................................................................................................................ 32
Locked Mode .................................................................................................................................................................................... 32
Lost-Phase Mode ............................................................................................................................................................................. 33
Holdover Mode ................................................................................................................................................................................ 33
Pre-Locked(2) Mode ........................................................................................................................................................................ 33
Power On Reset - PORB ............................................................................................................................................................................... 33
Electrical Specification .......................................................................................................................................................................... 35
Serial Microprocessor Interface Timing ............................................................................................................................................... 44
Package Information .............................................................................................................................................................................. 46
Thermal Conditions ....................................................................................................................................................................................... 47
Application Information .......................................................................................................................................................................... 48
Appendix A Rev2.1 Changes Described ............................................................................................................................................... 49
Revision History ...................................................................................................................................................................................... 49
Ordering Information .............................................................................................................................................................................. 50
Disclaimers ..................................................................................................................................................................................................... 50
Revision 2.01/December 2005 Semtech Corp.
2
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