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DS21Q58 E1 Quad Transceiver
2 of 74
TABLE OF CONTENTS
1.
ACRONYMS .......................................................................................................................6
2.
DETAILED DESCRIPTION.................................................................................................6
3.
BLOCK DIAGRAM .............................................................................................................7
4.
PIN DESCRIPTION.............................................................................................................8
4.1
PIN FUNCTION DESCRIPTIONS......................................................................................................12
5.
FUNCTIONAL DESCRIPTION .........................................................................................13
6.
HOST INTERFACE PORT................................................................................................14
6.1
PARALLEL PORT OPERATION .......................................................................................................14
6.2
SERIAL PORT OPERATION............................................................................................................14
7.
REGISTER MAP...............................................................................................................16
8.
CONTROL, ID, AND TEST REGISTERS .........................................................................17
8.1
POWER-UP SEQUENCE................................................................................................................18
8.2
FRAMER LOOPBACK ....................................................................................................................21
8.3
AUTOMATIC ALARM GENERATION .................................................................................................22
8.4
REMOTE LOOPBACK ....................................................................................................................22
8.5
LOCAL LOOPBACK .......................................................................................................................23
9.
STATUS AND INFORMATION REGISTERS ...................................................................27
9.1
INTERRUPT HANDLING .................................................................................................................28
9.2
CRC4 SYNC COUNTER................................................................................................................29
10. ERROR COUNT REGISTERS..........................................................................................34
10.1
BPV OR CV COUNTER .............................................................................................................34
10.2
CRC4 ERROR COUNTER..........................................................................................................34
10.3
E-BIT/PRBS BIT-ERROR COUNTER ..........................................................................................35
10.4
FAS ERROR COUNTER.............................................................................................................35
11. SIGNALING OPERATION................................................................................................36
11.1
RECEIVE SIGNALING.................................................................................................................36
11.2
TRANSMIT SIGNALING...............................................................................................................36
11.3
CAS OPERATION .....................................................................................................................36
12. DS0 MONITORING FUNCTION .......................................................................................37
13. PRBS GENERATION AND DETECTION.........................................................................39
14. SYSTEM CLOCK INTERFACE ........................................................................................40
15. TRANSMIT CLOCK SOURCE..........................................................................................41
16. IDLE CODE INSERTION ..................................................................................................41
17. PER-CHANNEL LOOPBACK ..........................................................................................42
18. ELASTIC STORE OPERATION .......................................................................................42
19. ADDITIONAL (Sa) AND INTERNATIONAL (Si) BIT OPERATION..................................43
20. USER-CONFIGURABLE OUTPUTS ................................................................................45
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