AS3543-ECTP datasheet(63/92 Pages) AMSCO

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Revision 1.11

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AS3543 3v2

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

Table 52. ADC_R Register

Name

Base

Default

ADC_R

2-wire serial

00h

Offset: 10h

Right ADC Input Register

Configures MUX_A and the gain from MUX_A output to the ADC/mixer input (Σ).

This register is reset when the block is disabled in AudioSet1 register (14h) or at a

AVDD27-POR. The register cannot be written when the block is disabled.

Bit

Bit Name

Default

Access

Bit Description

7:6

MUX_A<1:0>

R/W

Connect MUX A output to following inputs

00: Microphone (N4/N4)

01: Line_In1 (N1/N8)

10: Line_IN2 (N2/N7)

11: Mixer output (N24/N25)

n/a

4:0

ADR_VOL<4:0>

00000

R/W

volume settings for right ADC input, adjustable in 32 steps @

1.5dB; gain from MUX A output to ADC/mixer input (Σ) (N9)

11111: 12 dB gain

11110: 10.5 dB gain

00001: -33 dB gain

00000: -34.5 dB gain

Table 53. ADC_L Register

Name

Base

Default

ADC_L

2-wire serial

00h

Offset: 0Fh

Left ADC Input Register

Configures the ADC mode, gain from MUX_A output to the ADC/mixer input (Σ) input

and controls MUTE switch A.

This register is reset when the block is disabled in AudioSet1 register (14h) or at a

AVDD27-POR. The register cannot be written when the block is disabled.

Bit

Bit Name

Default

Access

Bit Description

7:6

ADC_MODE<1:0>

R/W

Devider setting for ADC sampling frequency

00: I2S LRCK / 2

01: I2S LRCK / 4

10: I2S LRCK

11: I2S LRCK

MUTE_A_OFF

R/W

Control of MUTE switch A

0: ADC input is set to mute

1: normal operation

4:0

ADL_VOL<4:0>

00000

R/W

volume settings for left ADC input, adjustable in 32 steps @

1.5dB; gain from MUX A output to ADC/mixer input (Σ) (N18)

11111: 6 dB gain

11110: 4.5 dB gain

00001: -39 dB gain

00000: -40.5 dB gain

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