PCM3793A
PCM3794A
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Register 89
Register 89
SLAS529A–JANUARY 2007–REVISED FEBRUARY 2007
B15
0
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
GMR2
GMR1
GMR0
RSV
GML2
GML1
GML0
IDX[6:0]: 101 1001b (59h): Register 89
GMR[2:0]: Gain Level Control for PG6 (Gain Amplifier for Analog Input or R-Channel Bypass)
GML[2:0]: Gain Level Control for PG5 (Gain Amplifier for Analog Input or L-Channel Bypass)
Default value: 111
These bits are used for setting the gain level of the analog source to the mixing amplifier. It is recommended to
set the gain level to avoid saturation in the analog mixer.
GMR[2:0]
GML[2:0]
Gain Level Control for PG6
Gain Level Control for PG5
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
–21 dB
–18 dB
–15 dB
–12 dB
–9 dB
–6 dB
–3 dB
0 dB (default)
Register 90
B15
0
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 90
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
RSV
RSV
RSV
RSV
RSV
G20R
G20L
IDX[6:0]: 1011010b (5Ah): Register 90
G20R: 20-dB Boost for PG2 (Gain Amplifier for AIN1R, AIN2R, and AIN3R)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G20R = 0
G20R = 1
0 dB (default)
20-dB boost
G20L: 20-dB Boost for PG1 (Gain Amplifier for AIN1L, AIN2L, and AIN3L)
Default value: 0
This bit is used to boost the microphone signal when the analog input is small.
G20L = 0
G20L = 1
0 dB (default)
20-dB boost
53
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