AS3430 datasheet(38/51 Pages) AMSCO

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AS3400 AS3410 AS3430 1v0

Data Sheet - R e g i s t e r D e s c r i p t i o n

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Table 32. MIC_MON Register

Name

Base

Default

MIC_MON

2-wire serial

00h (OTP)

Offset: 32h

OPT Microphone Monitor Mode Register

Configures the gain for the microphone input in monitor mode. This is a special register, writing needs to

be enabled by writing 10b to Reg 3Fh first. This register is reset at POR and gets loaded with the OTP

fuse contents.

Bit

Bit Name

Default

Access

Bit Description

MON_MODE

R/W

0: monitor mode is working with fixed microphone gain

1: monitor mode uses adjustable gain via the VOL pin

6:0

MIC_MON_OTP

<6:0>

000 0000

R/W

Volume settings for microphone input during monitor mode, adjustable in

127 steps of 0.375dB. If MON_MODE bit is set to 1 the gain can be further

adjusted via the VOL pin.

00 0000: MUTE

00 0001: -5.625dB gain

00 0010: -5.25 dB gain

11 1110: 41.250dB gain

11 1111: 41.625 dB gain

Table 33. AUDIO_SET Register

Name

Base

Default

AUDIO_SET

2-wire serial

00h (OTP)

Offset: 33h

OPT Audio Setting Register

Configures the audio settings. This is a special register, writing needs to be enabled by writing 10b to Reg

3Fh first. This register is reset at POR and gets loaded with the OTP fuse contents.

Bit

Bit Name

Default

Access

Bit Description

VOL_PIN_OFF

R/W

0: VOL pin is enabled

1: line in volume settings can only be done via I2C. VOL_PIN_MODE has to

be set to 1 in this mode.

VOL_PIN_MODE

R/W

0: VOL pin is in potentiometer mode

1: VOL pin is in up/down button mode

5LIN_MODE_OTP

R/W

0: line input stage operating in single ended mode

1: line input operating in mono balanced

4MIC_MODE_OTP

R/W

0: microphone input stage operating in single ended mode

1: normal operating in mono balanced

3HP_MODE_OTP

R/W

0: headphone stage operating in single ended mode

1: normal operating in mono balanced

2:0

LIN_MON_ATTEN

<6:0>

000

R/W

Volume settings for line input during monitor mode, adjustable in 7 steps of

6dB and mute.

000: 0dB gain

001: -6dB gain

110: -36dB gain

111: MUTE

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