AS3517H-ECTP datasheet(71/94 Pages) AMSCO

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AS3517 V17

Data Sheet, Confidential

www.austriamicrosystems.com

Table 69 AudioSet_2 Register

Name

Base

Default

AudioSet_2

2-wire serial

00h

Second Audio Set Register

Offset: 15h

Powers various internal audio blocks UP or DOWN and controls bias current.

Attention: This control register resets and holds DAC related registers in reset. After

activation the required register settings need to be re-programmed.

This register is reset at a DVDD-POR.

Bit

Bit Name

Default

Access

Bit Description

BIAS_OFF

R/W

Power-down of the AGND bias. This bit can be set, if the AFE

is used for digital data transfer and PMU functions only and all

the analog audio blocks are not used.

0: bias enabled

1: bias disabled, for power saving in non audio mode

SUM_OFF

R/W

Power-down of ΣR and ΣL

0: Mixer stage enabled (limits output signal to 1Vp)

1: Mixer stage powered down

AGC_OFF

R/W

Switches the signal limiter OFF (N20/N21)

0: automatic gain control for summing stage enabled

1: automatic gain control for summing stage disabled

4:3

IBR_DAC<1:0>

R/W

Bias current settings for DAC:

00: 50%

01: 60%

10: 75%

11: 100%

DAC_ON

R/W

0: DAC powered down

1: DAC enabled

1:0

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