WM8912
Production Data
REFER TO
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
DAC Volume Update
R31 (1Fh)
DAC Digital
Volume
8
DAC_VU
0
Writing a 1 to this bit causes left and right DAC volume
to be updated simultaneously
Right
7:0
DACR_VOL
[7:0]
1100_0000 Right DAC Digital Volume
00h = Mute
01h = -71.625dB
02h = -71.250dB
… (0.375dB steps)
C0h to FFh = 0dB
Register 1Fh DAC Digital Volume Right
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R33 (21h)
DAC Digital
1
12
DAC_MONO
0
DAC Mono Mix
0 = Stereo
1 = Mono (Mono mix output on enabled DAC)
Selects DAC filter characteristics
0 = Normal mode
11
10
DAC_SB_FILT
0
0
1 = Sloping stopband mode
DAC Soft Mute Ramp Rate
DAC_MUTERA
TE
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)
9
DAC_UNMUTE
_RAMP
0
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
6
3
DAC_OSR128
DAC_MUTE
0
1
DAC Oversample Rate Select
0 = Low power (normal OSR)
1 = High performance (double OSR)
DAC Soft Mute Control
0 = DAC Un-mute
1 = DAC Mute
2:1
DEEMPH [1:0]
00
DAC De-Emphasis Control
00 = No de-emphasis
01 = 32kHz sample rate
10 = 44.1kHz sample rate
11 = 48kHz sample rate
Register 21h DAC Digital 1
PD, Rev 4.0, September 2010
102
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
