WM8581 datasheet(30/94 Pages) WOLFSON

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WM8581

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PP Rev 1.0 March 2006

DAC FEATURES

DAC INPUT CONTROL

The Primary Audio Interface Receiver has a separate input pin for each stereo DAC. Any input pin

can be routed to any DAC using the DACSEL register bits.

BIT

LABEL

DEFAULT

DESCRIPTION

1:0

DAC1SEL

[1:0]

3:2

DAC2SEL

[1:0]

5:4

DAC3SEL

[1:0]

R15

DAC CONTROL 1

0Fh

7:6

DAC4SEL

[1:0]

DAC digital input select

00 = DAC takes data from DIN1

01 = DAC takes data from DIN2

10 = DAC takes data from DIN3

11 = DAC takes data from DIN4

Table 16 DAC Input Select Register

DAC OVERSAMPLING CONTROL

For sampling clock ratios of 256fs to 1152fs the DACs should be programmed to operate at 128

times oversampling rate. For sampling clock ratios of 128fs and 192fs, the DACs must be

programmed to operate at 64 times oversampling rate. The DACOSR register bit selects between

128x and 64x oversampling.

BIT

LABEL

DEFAULT

DESCRIPTION

R12

PAIF 3

0Ch

DACOSR

DAC Oversampling Rate Control

0= 128x oversampling

1= 64x oversampling

Table 17 DAC Oversampling Register

WM8581 Datasheet(PDF) 30 Page - Wolfson Microelectronics plc

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