Datasheet

MAX9860

16-Bit Mono Audio Voice Codec

Maxim Integrated

Table 9. Microphone Input Register

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.