DS21458LDK Maxim Integrated, DS21458LDK Datasheet - Page 187
DS21458LDK
Manufacturer Part Number
DS21458LDK
Description
Network Controller & Processor ICs
Manufacturer
Maxim Integrated
Datasheet
1.DS21458LDK.pdf
(269 pages)
- Current page: 187 of 269
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27.1 BERT Register Description
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Force Resynchronization (RESYNC). A low-to-high transition will force 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.
Bit 1/Load Bit and Error Counters (LC). A low-to-high transition latches the current bit and error counts into the registers
BBC1/BBC2/BBC3/BBC4 and BEC1/BEC2/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 a subsequent loads.
Bits 2 to 4/Pattern Select Bits (PS0 to PS2)
Bit 5/Receive Invert Data Enable (RINV).
Bit 6/Transmit Invert Data Enable (TINV).
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 a subsequent loads.
PS2
0
0
0
0
1
1
1
1
0 = do not invert the incoming data stream
1 = invert the incoming data stream
0 = do not invert the outgoing data stream
1 = invert the outgoing data stream
PS1
0
0
1
1
0
0
1
1
TC
7
0
PS0
0
1
0
1
0
1
0
1
Pseudorandom 2E7–1
Pseudorandom 2E11–1
Pseudorandom 2E15–1
Pseudorandom Pattern QRSS. A 2
zero restriction.
Repetitive Pattern
Alternating Word Pattern
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).
Pseudorandom 2E9 - 1
TINV
BC1
BERT Control Register 1
E0h
6
0
RINV
5
0
PATTERN DEFINITION
PS2
4
0
187 of 269
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- 1 pattern with 14 consecutive
PS1
3
0
DS21455/DS21458 Quad T1/E1/J1 Transceivers
PS0
2
0
LC
1
0
RESYNC
0
0
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