User Manual

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MAX98089
Low-Power, Stereo Audio Codec
with FlexSound Technology
Table 6. Record Path Signal Processing Registers
REGISTER BIT NAME DESCRIPTION
0x01
7
NG
Noise Gate Attenuation
Reports the current noise gate attenuation.
000 = 0dB
001 = 1dB
010 = 2dB
011 = 3dB to 5dB
100 = 6dB to 7dB
101 = 8dB to 9dB
110 = 10dB to 11dB
111 = 12dB
6
5
4
AGC
AGC Gain
Reports the current AGC gain setting.
VALUE GAIN (dB) VALUE GAIN (dB)
3
0x00 +20 0x0B +9
0x01 +19 0x0C +8
0x02 +18 0x0D +7
2
0x03 +17 0x0E +6
0x04 +16 0x0F +5
0x05 +15 0x10 +4
1
0x06 +14 0x11 +3
0x07 +13 0x12 +2
0x08 +12 0x13 +1
0
0x09 +11 0x14 to 0x1F 0
0x0A +10
0x3F
7 AGCSRC
AGC/Noise Gate Signal Source
Determines which ADC channel the AGC and noise gates analyze. Gain is adjusted on
both channels regardless of the AGCSRC setting.
0 = Left ADC output
1 = Maximum of either the left or right ADC output
6
AGCRLS
AGC Release Time
Defined as the duration from start to finish of gain increase in the region shown in Figure
12.
000 = 78ms
001 = 156ms
010 = 312ms
011 = 625ms
100 = 1.25s
101 = 2.5s
110 = 5s
111 = 10s
5
4