XRT72L13 Datasheet, PDF (14/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

XRT72L13
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC
REV. P1.0.6
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PRELIMINARY
RXDS3 LAPD CONTROL REGISTER (ADDRESS = 0X18) ............................................................................ 339
RXDS3 LAPD CONTROL REGISTER (ADDRESS = 0X18) ............................................................................ 340
5.0 Channelized (M13) Mode Operation of the XRT72L13 ................................................................ 341
M23 CONFIGURATION REGISTER (ADDRESS = 0X07) ................................................................................ 341
5.1 AN OVERVIEW OF CHANNELIZED OPERATION ................................................................................................... 341
5.1.1 In North American Applications .......................................................................................................... 341
Figure 116. Simple Illustration of the Overall Scheme to MUX 28 DS1 signals into a DS3 signal ......
341
Figure 117. Simple Illustration of the Overall Scheme to DEMUX a DS3 signal into 28 DS1 signals .
342
5.1.2 .ITU-T G.747 Applications .................................................................................................................. 342
Figure 118. Simple Illustration of the Overall Scheme to MUX 21 E1 signals into a DS3 signal . 342
Figure 119. Simple Illustration of the Overall Scheme to DEMUX 21 E1 signals from a DS3 signal ..
343
5.1.3 Real Configuration Options Offered by the XRT72L13 ...................................................................... 343
5.2 CHANNELIZED OPERATION IN THE TRANSMIT DIRECTION .................................................................................. 343
5.2.1 Channelized Operation, while the XRT72L13 is operating in the “M13” Framing Format. ................. 343
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 344
Figure 120. Illustration of M12 MUX #1 being configured to operate in the “DS1” Mode ............. 344
Figure 121. Illustration of the DS2 Framing Structure ..................................................................... 345
Figure 122. The DS2 Payload Bits ...................................................................................................... 345
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 347
M12 DS2 # 1 AIS REGISTER (ADDRESS = 0X21) ...................................................................................... 347
M23 TX DS2 AIS REGISTER (ADDRESS = 0X08) ...................................................................................... 347
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 348
Figure 123. Illustration of the M12 MUX # 1 being configured to operate in the “G.747” Mode .. 348
Figure 124. Illustration of the “ITU-T G.747 Framing” Structure ..................................................... 349
Figure 125. The “ITU-T G.747” Payload Bits ..................................................................................... 350
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 351
M12 DS2 # 1 AIS REGISTER (ADDRESS = 0X21) ...................................................................................... 351
M23 TX DS2 AIS REGISTER (ADDRESS = 0X08) ...................................................................................... 351
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 352
5.2.2 Channelized Operation, while the XRT72L13 is operating in the “C-Bit Parity” Framing Format. ...... 352
5.3 CHANNELIZED OPERATION IN THE RECEIVE DIRECTION .................................................................................... 352
5.3.1 Channelized Operation, while the XRT72L13 is operating in the “M13” Framing Format. ................. 352
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 352
DS2 # 1 FRAMER STATUS REGISTER (ADDRESS = 0XA3) ......................................................................... 353
DS2 # 1 FRAMER STATUS REGISTER (ADDRESS = 0XA3) ......................................................................... 353
DS2 # 1 FRAMER STATUS REGISTER (ADDRESS = 0XA3) ......................................................................... 354
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 354
M12 DS2 # 1 CONFIGURATION REGISTER (ADDRESS = 0X1A) .................................................................. 355
DS2 # 1 FRAMER STATUS REGISTER (ADDRESS = 0XA3) ......................................................................... 355
DS2 # 1 FRAMER STATUS REGISTER (ADDRESS = 0XA3) ......................................................................... 356
DS2 # 1 FRAMER STATUS REGISTER (ADDRESS = 0XA3) ......................................................................... 356
5.3.2 Channelized Operation, while the XRT72L13 is operating in the “C-Bit Parity” Framing Format. ...... 356
5.4 DIAGNOSTIC OPERATIONS - CHANNELIZED MODE ............................................................................................ 356
5.4.1 M12 MUX (DS1 or E1) Loop-backs .................................................................................................... 356
5.4.2 M23 MUX (DS2 or G.747) Loop-backs .............................................................................................. 356
5.5 CHANNELIZED MODE INTERRUPTS ................................................................................................................... 356
ORDERING INFORMATION .................................................................................................................. 357
PACKAGE DIMENSIONS ............................................................................................... 357
REVISIONS ............................................................................................................................................... 358
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