STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
12
13
14
TEST FEATURES DESCRIPTION ...................................................... 349
12.1 Test Mode 0............................................................................... 351
12.2 JTAG Test Port .......................................................................... 353
FUNCTIONAL TIMING......................................................................... 356
13.1 Transmit Backplane Interface.................................................... 356
13.2 Receive Backplane Interface..................................................... 362
OPERATION........................................................................................ 367
14.1 Configuring the COMET from Reset.......................................... 367
14.2 Using the Internal HDLC Transmitters....................................... 373
14.2.1 Automatic transmission mode using interrupts:.............. 374
14.2.2 TDPR Interrupt Routine:................................................. 375
14.2.3 Automatic transmission mode using polling:................... 376
14.3 Using the Internal HDLC Receivers........................................... 377
14.4 T1 Automatic Performance Report Format................................ 379
14.5 Using the Transmit Line Pulse Generator ................................. 381
14.6 Using the Line Receiver ............................................................ 401
14.6.1 T1 Performance Monitor Mode........................................411
14.7 Using the Test Pattern Generator.............................................. 414
14.7.1 Common Test Patterns................................................... 415
14.8 Using the Loopback Modes....................................................... 417
14.8.1 Line Loopback ................................................................ 417
14.8.2 Payload Loopback.......................................................... 418
14.8.3 Diagnostic Digital Loopback ........................................... 419
14.8.4 Per-Channel Loopback................................................... 420
PROPRIETARY AND CONFIDENTIAL
iii
PMC [ PMC-SIERRA, INC ]
