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XRT84L38 Datasheet(PDF) 5 Page - Exar Corporation

Part # XRT84L38
Description  OCTAL T1/E1/J1 FRAMER
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT84L38 Datasheet(HTML) 5 Page - Exar Corporation

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XRT84L38
OCTAL T1/E1/J1 FRAMER
REV. 1.0.0
II
Figure 15. Motorola µP Interface Signals during subsequent Write Operations of a Burst I/O Cy-
cle ......................................................................................................................................... 68
DMA-0 Write DMA Interface ............................................................................................................................. 69
1.5 MEMORY AND REGISTER MAP .............................................................................................................. 69
1.5.1 Memory Mapped I/O Indirect Addressing ................................................................................. 69
Figure 16. DMA Mode for the XRT84L38 and a Microprocessor ................................................. 69
TABLE 8: ADDRESS MAP ..................................................................................................................... 70
1.6 DESCRIPTION OF THE CONTROL REGISTERS ......................................................................................... 71
RECEIVE SUBSTITUTION SIGNALING REGISTER (RSSR) (INDIRECT ADDRESS = 0XN02H, 0XC0H - 0XD7H) 150
TABLE 9: PMON T1/E1 RECEIVE LINE CODE (BIPOLAR) VIOLATION COUNTER ................................... 175
TABLE 10: PMON T1/E1 RECEIVE LINE CODE (BIPOLAR) VIOLATION COUNTER ................................. 175
TABLE 11: PMON T1/E1 RECEIVE FRAMING ALIGNMENT BIT ERROR COUNTER ................................. 175
TABLE 12: PMON T1/E1 RECEIVE FRAMING ALIGNMENT BIT ERROR COUNTER ................................. 175
TABLE 13: PMON T1/E1 RECEIVE SEVERELY ERRORED FRAME COUNTER ........................................ 176
TABLE 14: PMON T1/E1 RECEIVE CRC-4 BLOCK ERROR COUNTER - MSB ..................................... 176
TABLE 15: PMON T1/E1 RECEIVE CRC-4 BLOCK ERROR COUNTER - LSB ...................................... 176
TABLE 16: PMON T1/E1 RECEIVE FAR-END BLOCK ERROR COUNTER - MSB .................................. 176
TABLE 17: PMON T1/E1 RECEIVE FAR END BLOCK ERROR COUNTER .............................................. 177
TABLE 18: PMON T1/E1 RECEIVE SLIP COUNTER ............................................................................ 177
TABLE 19: PMON T1/E1 RECEIVE LOSS OF FRAME COUNTER .......................................................... 177
TABLE 20: PMON T1/E1 RECEIVE CHANGE OF FRAME ALIGNMENT COUNTER ................................... 178
TABLE 21: PMON LAPD T1/E1 FRAME CHECK SEQUENCE ERROR COUNTER ................................... 178
TABLE 22: T1/E1 PRBS BIT ERROR COUNTER MSB ........................................................................ 178
TABLE 23: T1/E1 PRBS BIT ERROR COUNTER LSB ......................................................................... 179
TABLE 24: T1/E1 TRANSMIT SLIP COUNTER ...................................................................................... 179
1.7 THE INTERRUPT STRUCTURE WITHIN THE FRAMER .............................................................................. 180
TABLE 25: LIST OF THE POSSIBLE CONDITIONS THAT CAN GENERATE INTERRUPTS, IN EACH FRAMER . 180
TABLE 26: ADDRESS OF THE BLOCK INTERRUPT STATUS REGISTERS ................................................. 181
TABLE 27: BLOCK INTERRUPT STATUS REGISTER .............................................................................. 182
TABLE 28: BLOCK INTERRUPT ENABLE REGISTER ............................................................................. 183
1.7.1 Configuring the Interrupt System, at the Framer Level ........................................................... 184
TABLE 29: INTERRUPT CONTROL REGISTER ....................................................................................... 184
2.0 The E1 Framing Structure .................................................................................................................... 186
2.1 THE SINGLE E1 FRAME ...................................................................................................................... 186
Timeslot 0 ....................................................................................................................................................... 186
Timeslot 0 octets within FAS frames .............................................................................................................. 186
Figure 17. Single E1 Frame Diagram ........................................................................................... 186
TABLE 30: BIT FORMAT OF TIMESLOT 0 OCTET WITHIN A FAS E1 FRAME .......................................... 186
Bit 0—Si (International Bit) ............................................................................................................................. 187
Bit 0—Si (International Bit) ............................................................................................................................. 187
Bit 1—Fixed at “1” .......................................................................................................................................... 187
Bit 2—A (FAS Frame Yellow Alarm Bit) ......................................................................................................... 187
Bit 3 through 7—Sa4–Sa8 (National Bits) ...................................................................................................... 187
2.2 THE E1 MULTI-FRAME STRUCTURES ................................................................................................... 187
2.2.1 The CRC Multi-frame Structure .............................................................................................. 187
TABLE 31: BIT FORMAT OF TIMESLOT 0 OCTET WITHIN A NON-FAS E1 FRAME .................................. 187
2.2.2 CAS Multi-Frames and Channel Associated Signaling .......................................................... 188
TABLE 32: BIT FORMAT OF ALL TIMESLOT 0 OCTETS WITHIN A CRC MULTI-FRAME ............................ 188
Figure 18. Frame/Byte Format of the CAS Multi-Frame Structure ............................................ 189
Figure 19. E1 Frame Format ......................................................................................................... 190
3.0 The DS1 Framing Structure ................................................................................................................. 191
3.1 T1 SUPER FRAME FORMAT (SF) ........................................................................................................ 191
Figure 20. T1 Frame Format ......................................................................................................... 191
Figure 21. T1 Superframe PCM Format ....................................................................................... 192
TABLE 33: SUPERFRAME FORMAT ..................................................................................................... 192


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