WM8959 Wolfson Microelectronics Ltd., WM8959 Datasheet - Page 132

• Manufacturer Part Number: WM8959
• Description: Mobile Multimedia DAC with Dual-mode Class AB/D Speaker Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8959
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R10 (0Ah)
DAC Control
R11 (0Bh)
Left DAC
Digital Volume
R12 (0Ch)
REGISTER
ADDRESS
10:0
15:13
12
11
10
9
8
7
6
5:4
3
2
1
0
15:9
8
7:0
15:9
BIT
DACLRC_RATE
[10:0]
DAC_SDMCLK
_RATE
AIF_LRCLKRATE
DAC_MONO
DAC_SB_FILT
DAC_MUTERATE
DAC_MUTEMODE
DEEMP[1:0]
DAC_MUTE
DACL_DATINV
DACR_DATINV
DAC_VU
DACL_VOL
[7:0]
LABEL
040h
000b
0b
0b
0b
0b
0b
0b
0b
00b
0b
1b
0b
0b
00h
N/A
1100_000
0b
(0dB)
00h
DEFAULT
DACLRC Rate
DACLRC clock output = BCLK / DACLRC_RATE
Integer (LSB = 1)
Valid from 8..2047
Reserved - Do Not Change
DAC clocking rate
0 = Normal operation (64fs)
1 = SYSCLK/4
Reserved - Do Not Change
LRCLK Rate
0 = Normal mode (256 * fs)
1 = USB mode (272 * fs)
DAC Mono Mix
0 = Stereo
1 = Mono (Mono mix output on enabled DACs)
Selects DAC filter characteristics
0 = Normal mode
1 = Sloping stopband mode
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 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
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 Soft Mute Control
0 = DAC Un-mute
1 = DAC Mute
Left DAC Invert
0 = Left DAC output not inverted
1 = Left DAC output inverted
Right DAC Invert
0 = Right DAC output not inverted
1 = Right DAC output inverted
Reserved - Do Not Change
DAC Volume Update
Writing a 1 to this bit will cause left and right DAC volume to
be updated simultaneously
Left DAC Digital Volume
(See Table 18 for volume settings)
Reserved - Do Not Change
DESCRIPTION
PP, May 2008, Rev 3.1
Pre-Production
132