WM8753LEBSLASHV datasheet(73/87 Pages) WOLFSON

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WM8753L

Advanced Information

AI Rev 3.1 June 2004

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

VDACBIASX0P5

Voice DAC bias current reduce:

0 = 1x bias

1 = 0.5x bias (reduced power)

MBIASBOOST

Master bias current boost

0 = 1x bias

1 = 1.5x bias (increased power)

[6:5]

MICBIASBST

[1:0]

Microphone preamplifier current boost:

00 = 1x bias

01 = 2x bias

10 = 3x bias

11 = 4x bias

[4:3]

BUFBIAS[1:0]

ADC sample and hold buffer bias

control:

00 = 1x bias

01 = 0.25x bias (lowest power)

10 = 0.5x bias (reduced power)

11 = 1.5x bias (increased power)

IPBIASX0P5

ADC

volume

control

(PGA)

and

ADCINV bias reduce:

0 = 1x bias

1 = 0.5x bias (reduced power)

R61 (3Dh)

Bias control

[1:0]

ADCBIAS[1:0]

ADC bias current reduce:

00 = 1x bias

01 = 0.25x bias (lowest power)

10 = 0.5x bias (reduced power)

11 = 1.5x bias (increased power)

Table 71 Bias Control Bits

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

OPBIASX0P5

Analogue Output bias current control:

0 = 1x bias

1 = 0.5x bias (reduced power)

R63 (3Fh)

Additional

control

DMBIAS0P5

DAC and Mixer bias current control:

0 = 1x bias

1 = 0.5x bias (reduced power)

Table 72 Additional Control Register – Bias Control Bits

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