Pre-Production
WM8940
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
00h
DESCRIPTION
REFER TO
54 (36h)
15:9
8
Reserved
SPKATTN
0
Attenuation control for bypass path (output of input
boost stage) to speaker mixer input
Analogue Outputs
0 = 0dB
1 = -10dB
7
SPKZC
0
Speaker Volume control zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
Speaker output mute enable
0=Speaker output enabled
1=Speaker output muted (VMIDOP)
Speaker Volume Adjust
111111 = +6dB
Analogue Outputs
Analogue Outputs
Analogue Outputs
6
SPKMUTE
SPKVOL
1
5:0
111001
111110 = +5dB
… (1.0 dB steps)
111001=0dB
…
000000=-57dB
55 (37h)
56 (38h)
15:0
15:8
7
0000h
00h
0
Reserved
Reserved
MONOATTN
MONOMUTE
Attenuation control for bypass path (output of input
boost stage) to mono mixer input
Analogue Outputs
Analogue Outputs
0 = 0dB
1 = -10dB
6
0
MONOOUT Mute Control
0=No mute
1=Output muted. During mute the mono output will
output VMID which can be used as a DC reference for
a headphone out.
5:3
2
0
0
Reserved
AUX2MONO
BYP2MONO
Output of Auxiliary amplifier to mono mixer input:
0 = not selected
Analogue Outputs
Analogue Outputs
1 = selected
1
0
0
0
Bypass path (output of input boost stage) to mono
mixer input
0 = non selected
1 = selected
DAC2MONO
Output of DAC to mono mixer input
0 = not selected
Analogue Outputs
1 = selected
Pre-Production, Rev 3.0, February 2007
77
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
