Maxim Integrated DS33R11 - Manual (Page 292)

DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
292 of 344
Register Name: TR.BC1
Register Description: BERT Control Register 1
Register Address: E0h
Bit
# 7 6 5 4 3 2 1 0
Name TC TINV RINV PS2 PS1 PS0 LC RESYNC
Default 0 0 0 0 0 0 0 0
Bit 7: Transmit Pattern Load (TC). A low-to-high transition loads the pattern generator with the pattern that is to
be generated. This bit should be toggled from low to high whenever the host wishes to load a new pattern. Must be
cleared and set again for subsequent loads.
Bit 6: Transmit Invert-Data Enable (TINV)
0 = do not invert the outgoing data stream
1 = invert the outgoing data stream
Bit 5: Receive Invert-Data Enable (RINV)
0 = do not invert the incoming data stream
1 = invert the incoming data stream
Bits 2 – 4: Pattern Select Bits (PS0 to PS2)
PS
2
PS1 PS0 Pattern Definition
0 0 0 Pseudorandom 2E7 - 1
0 0 1 Pseudorandom 2E11 - 1
0 1 0 Pseudorandom 2E15 - 1
0 1 1
Pseudorandom pattern QRSS. A 2 20 - 1 pattern with 14 consecutive zero
restrictions.
1 0 0 Repetitive pattern
1 0 1 Alternating word pattern
1 1 0
Modified 55 octet (Daly) pattern. The Daly pattern is a repeating 55 octet
pattern that is byte-aligned into the active DS0 time slots. The pattern is
defined in an ATIS (Alliance for Telecommunications Industry Solutions)
Committee T1 Technical Report Number 25 (November 1993).
1 1 1 Pseudorandom 2E9 – 1
Bit 1: Load Bit and Error Counters (LC). A low-to-high transition latches the current bit and error counts into
registers TR.BBC1/ TR.BBC2/ TR.BBC3/ TR.BBC4 and TR.BEC1/ TR.BEC2/ TR.BEC3 and clears the internal
count. This bit should be toggled from low to high whenever the host wishes to begin a new acquisition period.
Must be cleared and set again for subsequent loads.
Bit 0: Force Resynchronization (RESYNC). A low-to-high transition forces the receive BERT synchronizer to
resynchronize to the incoming data stream. This bit should be toggled from low to high whenever the host wishes
to acquire synchronization on a new pattern. Must be cleared and set again for a subsequent resynchronization.