Pre-Production
WM8985
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
Left speaker output volume:
REFER TO
5:0
LOUT2VOL
111001
Analogue
Outputs
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
55 (37h)
8
7
OUT2VU
N/A
0
LOUT2 and ROUT2 volumes do not update until
a 1 is written to OUT2VU (in reg 54 or 55)
Analogue
Outputs
ROUT2ZC
Speaker volume zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
Right speaker output mute:
0 = Normal operation
1 = Mute
Analogue
Outputs
6
ROUT2MUTE
ROUT2VOL
0
Analogue
Outputs
5:0
111001
Right speaker output volume:
000000 = -57dB
Analogue
Outputs
...
111001 = 0dB
...
111111 = +6dB
56 (38h)
8:7
6
00
0
Reserved
OUT3MUTE
0 = Output stage outputs OUT3 mixer
Analogue
Outputs
1 = Output stage muted – drives out VMID. Can
be used as VMID buffer in this mode.
5:4
3
00
0
Reserved. Initialise to 0
OUT4 mixer output to OUT3
0 = disabled
OUT4_2OUT3
BYPL2OUT3
LMIX2OUT3
LDAC2OUT3
Analogue
Outputs
1= enabled
2
1
0
0
0
1
Left ADC input to OUT3
0 = disabled
Analogue
Outputs
1= enabled
Left DAC mixer to OUT3
0 = disabled
Analogue
Outputs
1= enabled
Left DAC output to OUT3
0 = disabled
Analogue
Outputs
1= enabled
57 (39h)
8
7
0
0
Reserved. Initialise to 0
OUT3 mixer output to OUT4
0 = disabled
OUT3_2OUT4
OUT4MUTE
Analogue
Outputs
1 = enabled
6
0
0 = Output stage outputs OUT4 mixer
Analogue
Outputs
1 = Output stage muted – drives out VMID. Can
be used as VMID buffer in this mode.
5
4
HALFSIG
0
0
0=OUT4 normal output
1=OUT4 attenuated by 6dB
Left DAC mixer to OUT4
0 = disabled
Analogue
Outputs
LMIX2OUT4
Analogue
Outputs
1= enabled
3
LDAC2OUT4
0
Left DAC to OUT4
0 = disabled
Analogue
Outputs
1= enabled
PP, Rev 3.4, October 2006
107
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
