Datasheet

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PCM1870
SLAS544A – MAY 2007 – REVISED SEPTEMBER 2007
Register 90
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Register 90 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV RSV RSV RSV RSV G20R G20L
IDX[6:0]: 101 1010b (5Ah) Register 90
G20R: 20-dB Boost for PG2 (Gain Amplifier for AIN1R and AIN2R)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G12R G20R PG2 GAIN
(REGISTER 124) (REGISTER 90)
0 0 0 dB (default)
0 1 20 dB
1 0 12 dB
1 1 Reserved
G20L: 20 dB Boost for PG1 (Gain Amplifier for AIN1L and AIN2L)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G12L G20L PG1 GAIN
(REGISTER 124) (REGISTER 90)
0 0 0 dB (default)
0 1 20 dB
1 0 12 dB
1 1 Reserved
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