IDT82P2281 Просмотр технического описания (PDF) - Integrated Device Technology
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IDT82P2281 Datasheet PDF : 375 Pages
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Table of Contents
FEATURES ........................................................................................................................................................................ 1
APPLICATIONS ................................................................................................................................................................ 1
BLOCK DIAGRAM ............................................................................................................................................................ 2
1 PIN ASSIGNMENT ............................................................................................................................................................ 3
2 PIN DESCRIPTION ........................................................................................................................................................... 4
3 FUNCTIONAL DESCRIPTION ........................................................................................................................................ 10
3.1 T1 / E1 / J1 MODE SELECTION .................................................................................................................................................................. 12
3.2 RECEIVER IMPEDANCE MATCHING ......................................................................................................................................................... 13
3.3 ADAPTIVE EQUALIZER .............................................................................................................................................................................. 15
3.4 DATA SLICER .............................................................................................................................................................................................. 15
3.5 CLOCK AND DATA RECOVERY ................................................................................................................................................................ 15
3.6 RECEIVE JITTER ATTENUATOR ............................................................................................................................................................... 16
3.7 DECODER .................................................................................................................................................................................................... 17
3.7.1 Line Code Rule ............................................................................................................................................................................... 17
3.7.1.1 T1 / J1 Mode .................................................................................................................................................................... 17
3.7.1.2 E1 Mode ........................................................................................................................................................................... 17
3.7.2 Decode Error Detection ................................................................................................................................................................. 17
3.7.2.1 T1 / J1 Mode .................................................................................................................................................................... 17
3.7.2.2 E1 Mode ........................................................................................................................................................................... 17
3.7.3 LOS Detection ................................................................................................................................................................................ 18
3.8 FRAME PROCESSOR ................................................................................................................................................................................. 21
3.8.1 T1/J1 Mode ...................................................................................................................................................................................... 21
3.8.1.1 Synchronization Searching ............................................................................................................................................... 21
3.8.1.1.1 Super Frame (SF) Format ............................................................................................................................. 21
3.8.1.1.2 Extended Super Frame (ESF) Format ........................................................................................................... 22
3.8.1.1.3 T1 Digital Multiplexer (DM) Format (T1 only) ................................................................................................ 23
3.8.1.1.4 Switch Line Carrier - 96 (SLC-96) Format (T1 only) ...................................................................................... 24
3.8.1.2 Error Event And Out Of Synchronization Detection .......................................................................................................... 25
3.8.1.2.1 Super Frame (SF) Format ............................................................................................................................. 25
3.8.1.2.2 Extended Super Frame (ESF) Format ........................................................................................................... 25
3.8.1.2.3 T1 Digital Multiplexer (DM) Format (T1 only) ................................................................................................ 25
3.8.1.2.4 Switch Line Carrier - 96 (SLC-96) Format (T1 only) ...................................................................................... 25
3.8.1.3 Overhead Extraction (T1 Mode SLC-96 Format Only) ..................................................................................................... 26
3.8.1.4 Interrupt Summary ............................................................................................................................................................ 26
3.8.2 E1 Mode .......................................................................................................................................................................................... 28
3.8.2.1 Synchronization Searching ............................................................................................................................................... 30
3.8.2.1.1 Basic Frame .................................................................................................................................................. 30
3.8.2.1.2 CRC Multi-Frame ........................................................................................................................................... 31
3.8.2.1.3 CAS Signaling Multi-Frame ........................................................................................................................... 32
3.8.2.2 Error Event And Out Of Synchronization Detection .......................................................................................................... 32
3.8.2.2.1 Out Of Basic Frame Synchronization ............................................................................................................ 33
3.8.2.2.2 Out Of CRC Multi-Frame Synchronization .................................................................................................... 33
3.8.2.2.3 Out Of CAS Signaling Multi-Frame Synchronization ..................................................................................... 33
3.8.2.3 Overhead Extraction ......................................................................................................................................................... 33
3.8.2.3.1 International Bit Extraction ............................................................................................................................. 33
3.8.2.3.2 Remote Alarm Indication Bit Extraction ......................................................................................................... 33
Table of Contents
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October 7, 2003
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