WM8959 datasheet(132/155 Pages) WOLFSON

132 / 155 page

WM8959

Pre-Production

PP, May 2008, Rev 3.1

132

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

10:0

DACLRC_RATE

[10:0]

040h

DACLRC Rate

DACLRC clock output = BCLK / DACLRC_RATE

Integer (LSB = 1)

Valid from 8..2047

15:13

000b

Reserved - Do Not Change

DAC_SDMCLK

_RATE

DAC clocking rate

0 = Normal operation (64fs)

1 = SYSCLK/4

Reserved - Do Not Change

AIF_LRCLKRATE

LRCLK Rate

0 = Normal mode (256 * fs)

1 = USB mode (272 * fs)

DAC_MONO

DAC Mono Mix

0 = Stereo

1 = Mono (Mono mix output on enabled DACs)

DAC_SB_FILT

Selects DAC filter characteristics

0 = Normal mode

1 = Sloping stopband mode

DAC_MUTERATE

DAC Soft Mute Ramp Rate

0 = Fast ramp (fs/2, maximum ramp time is 10.7ms at fs=48k)

1 = Slow ramp (fs/32, maximum ramp time is 171ms at

fs=48k)

DAC_MUTEMODE

DAC Soft Mute Mode

0 = Disabling soft-mute (DAC_MUTE=0) will cause the DAC

volume to change immediately to DACL_VOL and DACR_VOL

settings

1 = Disabling soft-mute (DAC_MUTE=0) will cause the DAC

volume to ramp up gradually to the DACL_VOL and

DACR_VOL settings

5:4

DEEMP[1:0]

00b

DAC De-Emphasis Control

00 = De-emphasis disabled

01 = De-emphasis enabled (Optimised for fs=32kHz)

10 = De-emphasis enabled (Optimised for fs=44.1kHz)

11 = De-emphasis enabled (Optimised for fs=48kHz)

Reserved - Do Not Change

DAC_MUTE

DAC Soft Mute Control

0 = DAC Un-mute

1 = DAC Mute

DACL_DATINV

Left DAC Invert

0 = Left DAC output not inverted

1 = Left DAC output inverted

R10 (0Ah)

DAC Control

DACR_DATINV

Right DAC Invert

0 = Right DAC output not inverted

1 = Right DAC output inverted

15:9

00h

Reserved - Do Not Change

DAC_VU

N/A

DAC Volume Update

Writing a 1 to this bit will cause left and right DAC volume to

be updated simultaneously

R11 (0Bh)

Left DAC

Digital Volume

7:0

DACL_VOL

[7:0]

1100_000

(0dB)

Left DAC Digital Volume

(See Table 18 for volume settings)

R12 (0Ch)

15:9

00h

Reserved - Do Not Change

WM8959 Datasheet(PDF) 132 Page - Wolfson Microelectronics plc

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