Table 9. microphone input register – Rainbow Electronics MAX9860 User Manual
Page 29
MAX9860
16-Bit Mono Audio Voice Codec
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29
Table 9. Microphone Input Register
REGISTER ADDRESS
B7
B6
B5
B4
B3
B2
B1
B0
0x0C
0
PAM
PGAM
BITS
FUNCTION
Left and Right Microphone Preamp Gain
CODE
GAIN (dB)
00
Disabled
01
0
10
+20
11
+30
PAM
Note: Selecting 00 disables the microphone inputs and microphone bias automatically.
Left and Right Microphone PGA
CODE
GAIN (dB)
CODE
GAIN (dB)
0x00
+20
0x0B
+9
0x01
+19
0x0C
+8
0x02
+18
0x0D
+7
0x03
+17
0x0E
+6
0x04
+16
0x0F
+5
0x05
+15
0x10
+4
0x06
+14
0x11
+3
0x07
+13
0x12
+2
0x08
+12
0x13
+1
0x09
+11
≥ 0x14
0
0x0A
+10
—
—
PGAM
Note: When AGC is enabled, the AGC controller overrides these settings.