Rainbow Electronics MAX9860 - Manual (Page 29)

MAX9860
16-Bit Mono Audio Voice Codec
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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.