WM8940
Pre-Production
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
7
6
5
MONOEN
0
MONOOUT enable
0 = disabled
Analogue Outputs
Analogue Outputs
Analogue Outputs
1 = enabled
SPKNEN
SPKPEN
0
0
SPKOUTN enable
0 = disabled
1 = enabled
SPKOUTP enable
0 = disabled
1 = enabled
4
3
Reserved
0
0
MONOMIXEN
Mono Mixer Enable
0 = disabled
Analogue Outputs
Analogue Outputs
1 = enabled
2
SPKMIXEN
DACEN
0
Speaker Mixer Enable
0 = disabled
1 = enabled
1
0
0
0
Reserved
DAC enable
Analogue Outputs
0 = DAC disabled
1 = DAC enabled
Reserved
4 (04h)
15:10
9
00h
0
LOUTR
LOUTR control
0=normal
Digital Audio
Interfaces
1=Input mono channel data output on left and right
channels
8
7
BCP
0
0
BCLK polarity
0=normal
Digital Audio
Interfaces
1=inverted
FRAMEP
Frame clock polarity
0=normal
Digital Audio
Interfaces
1=inverted
DSP Mode control
1 = Configures the interface so that MSB is available
on 1st BCLK rising edge after FRAME rising edge
0 = Configures the interface so that MSB is available
on 2nd BCLK rising edge after FRAME rising edge
6:5
4:3
WL
10
10
Word length
Digital Audio
Interfaces
00=16 bits
01=20 bits
10=24 bits
11=32 bits
FMT
Audio interface Data Format Select:
00=Right Justified
01=Left Justified
10=I2S format
Digital Audio
Interfaces
11= DSP/PCM mode
2
1
DLRSWAP
ALRSWAP
0
0
Controls whether DAC data appears in ‘right’ or ‘left’
phases of FRAME clock:
Digital Audio
Interfaces
0=DAC data appear in ‘left’ phase of FRAME
1=DAC data appears in ‘right’ phase of FRAME
Controls whether ADC data appears in ‘right’ or ‘left’
phases of FRAME clock:
Digital Audio
Interfaces
0=ADC data appear in ‘left’ phase of FRAME
1=ADC data appears in ‘right’ phase of FRAME
Pre-Production, Rev 3.0, February 2007
68
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
