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28960-DSH-001-A_15 Datasheet, PDF (76/104 Pages) M/A-COM Technology Solutions, Inc. – Single-Chip 2B1Q Transceiver | |||
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3.0 Registers
3.1 Conventions
Bt8960
Single-Chip 2B1Q Transceiver
3.2.52 0x4C, 0x4DâBit Error Rate Meter Register (ber_meter_low,
ber_meter_high)
A 2-byte read-only register containing all 16 bits of the unsigned bit-error-rate meter accumulator. This meter
counts the number of error-free bits recovered by the detector during each Meter Timer countdown interval. An
error-free bit is deï¬ned as a match (equal comparison) of the detectorâs slicer/peak detector output and its
scrambler/descrambler output, when operating as a scrambler. When operating as a descrambler, the meter sim-
ply counts the number of logic ones produced by the descrambler. The meter register is automatically loaded at
the end of each countdown interval, and must be read low byte ï¬rst, followed by high byte, unseparated by any
other meter-register read access.
7
6
5
4
3
2
1
0
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
D[15]
D[14]
D[13]
D[12]
D[11]
D[10]
D[9]
D[8]
3.2.53 0x4EâSymbol Histogram Meter Register (symbol_histogram)
A single-byte read-only register containing 8 MSBs of the 16-bit unsigned symbol histogram meter accumula-
tor. This meter counts the number of plus-one or minus-one symbols (+1, â1) detected during each Meter Timer
countdown interval. No increment occurs when a plus-three or minus-three symbol (+3, â3) is detected. The
meter register is automatically loaded at the end of each countdown interval.
7
6
5
4
3
2
1
0
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
3.2.54 0x50, 0x51âNoise Level Meter Register (nlm_low, nlm_high)
A 2-byte read-only register containing 16 MSBs of the 32-bit unsigned noise-level meter accumulator. This
meter sums the absolute value of the detectorâs slicer-error signal over each Meter Timer countdown interval.
Automatically loaded at the end of each interval, the meter register must be read the low byte ï¬rst, followed by
high byte, unseparated by any other meter-register read access.
7
D[23]
D[31]
6
D[22]
D[30]
5
D[21]
D[29]
4
D[20]
D[28]
3
D[19]
D[27]
2
D[18]
D[26]
1
D[17]
D[25]
0
D[16]
D[24]
66
N8960DSB
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