XRT73L03A Datasheet, PDF (5/62 Pages) Exar Corporation – 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT

XRT73L03A
3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
REV. 2.0.4
3.4 THE HDB3/B3ZS DECODER ............................................................................................................................. 39
3.4.1 B3ZS Decoding (DS3/STS-1 Applications) .......................................................................................... 39
3.4.2 HDB3 Decoding (E3 Applications) ....................................................................................................... 39
3.4.3 Configuring the HDB3/B3ZS Decoder ................................................................................................. 40
COMMAND REGISTER CR2-(N) ...................................................................................................... 40
3.5 LOS DECLARATION/CLEARANCE ....................................................................................................................... 40
3.5.1 The LOS Declaration/Clearance Criteria for E3 Applications ............................................................... 41
3.5.2 The LOS Declaration/Clearance Criteria for DS3 and STS-1 Applications .......................................... 42
COMMAND REGISTER CR0-(N) ...................................................................................................... 43
COMMAND REGISTER CR2-(N) ...................................................................................................... 43
COMMAND REGISTER CR0-(N) ...................................................................................................... 43
COMMAND REGISTER CR2-(N) ...................................................................................................... 43
3.5.3 Muting the Recovered Data while the LOS is being Declared ............................................................. 43
COMMAND REGISTER CR3-(N) ...................................................................................................... 44
3.6 ROUTING THE RECOVERED TIMING AND DATA INFORMATION TO THE RECEIVING TERMINAL EQUIPMENT .............. 44
3.6.1 Routing Dual-Rail Format Data to the Receiving Terminal Equipment ................................................ 44
COMMAND REGISTER CR3-(N) ...................................................................................................... 46
3.6.2 Routing Single-Rail Format (Binary Data Stream) data to the Receive Terminal Equipment .............. 46
COMMAND REGISTER CR3-(N) ...................................................................................................... 46
3.7 SHUTTING OFF THE RECEIVE SECTION ............................................................................................................. 47
COMMAND REGISTER CR3-(N) ...................................................................................................... 47
4.0 Diagnostic Features of the XRT73L03A ......................................................................................... 48
4.1 THE ANALOG LOCAL LOOP-BACK MODE ............................................................................................................ 48
4.2 THE DIGITAL LOCAL LOOP-BACK MODE. ........................................................................................................... 49
COMMAND REGISTER CR4-(N) ...................................................................................................... 49
COMMAND REGISTER CR4-(N) ...................................................................................................... 49
4.3 THE REMOTE LOOP-BACK MODE ...................................................................................................................... 50
COMMAND REGISTER CR4-(n) ...................................................................................................... 50
4.4 TXOFF FEATURES ........................................................................................................................................... 51
COMMAND REGISTER CR1-(N) ...................................................................................................... 51
4.5 THE TRANSMIT DRIVE MONITOR FEATURES ....................................................................................................... 51
4.6 THE TAOS (TRANSMIT ALL ONES) FEATURE .................................................................................................... 52
5.0 The Microprocessor Serial Interface .............................................................................................. 52
5.1 DESCRIPTION OF THE COMMAND REGISTERS .................................................................................................... 52
COMMAND REGISTER CR1-(N) ...................................................................................................... 52
5.2 DESCRIPTION OF BIT-FIELDS FOR EACH COMMAND REGISTER ........................................................................... 54
5.2.1 Command Register - CR0-(n) .............................................................................................................. 54
COMMAND REGISTER CR0-(N) ....................................................................................................... 54
COMMAND REGISTER CR1-(N) ...................................................................................................... 54
5.2.3 Command Register CR2-(n) ................................................................................................................ 55
COMMAND REGISTER CR2-(N) ...................................................................................................... 55
COMMAND REGISTER CR3-(N) ...................................................................................................... 55
COMMAND REGISTER CR4-(N) ...................................................................................................... 56
5.3 OPERATING THE MICROPROCESSOR SERIAL INTERFACE. ................................................................................... 57
ORDERING INFORMATION ............................................................................................. 59
PACKAGE DIMENSIONS ................................................................................................. 59
REVISION HISTORY ..................................................................................................................................... 60
REV # ........................................................................................................................................... 60
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