WM8904
Pre-Production
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
DSP Clock enable
0 = Disabled
Clocking and
Sample Rates
1
CLK_DSP_EN
A
0
1 = Enabled
Zero Cross timeout enable
0 = Disabled
Clocking and
Sample Rates
0
TOCLK_ENA
0
1 = Enabled
Register 16h Clock Rates 2
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Left DAC Invert
Digital Mixing
R24 (18h)
Audio
Interface 0
12
DACL_DATINV
0
0 = Left DAC output not inverted
1 = Left DAC output inverted
Right DAC Invert
Digital Mixing
Digital Mixing
11
DACR_DATINV
0
0 = Right DAC output not inverted
1 = Right DAC output inverted
DAC Digital Input Volume Boost
00 = 0dB
10:9
DAC_BOOST
[1:0]
00
01 = +6dB (Input data must not exceed -6dBFS)
10 = +12dB (Input data must not exceed -12dBFS)
11 = +18dB (Input data must not exceed -18dBFS)
Digital Loopback Function
Digital Audio
8
LOOPBACK
0
Interface Control
0 = No loopback
1 = Loopback enabled (ADC data output is directly
input to DAC data input)
Left Digital Audio channel source
0 = Left ADC data is output on left channel
1 = Right ADC data is output on left channel
Right Digital Audio channel source
0 = Left ADC data is output on right channel
1 = Right ADC data is output on right channel
Left DAC Data Source Select
0 = Left DAC outputs left channel data
1 = Left DAC outputs right channel data
Right DAC Data Source Select
0 = Right DAC outputs left channel data
1 = Right DAC outputs right channel data
ADC Companding Enable
0 = disabled
Digital Audio
Interface Control
7
6
5
4
3
2
1
0
AIFADCL_SRC
AIFADCR_SRC
AIFDACL_SRC
AIFDACR_SRC
ADC_COMP
0
1
0
1
0
0
0
0
Digital Audio
Interface Control
Digital Audio
Interface Control
Digital Audio
Interface Control
Digital Audio
Interface Control
1 = enabled
ADC Companding Type
Digital Audio
Interface Control
ADC_COMPMO
DE
0 = µ-law
1 = A-law
DAC Companding Enable
0 = disabled
Digital Audio
Interface Control
DAC_COMP
1 = enabled
DAC Companding Type
Digital Audio
Interface Control
DAC_COMPMO
DE
0 = µ-law
1 = A-law
Register 18h Audio Interface 0
PP, Rev 3.3, September 2012
146
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
