WM8742GEDS/RV View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'WM8742GEDS/RV' PDF : 65 Pages View PDF
WM8742
Production Data
REGISTER
ADDRESS
R4
Volume
Control
04h
BITS
NAME
0 VOL_RAMP
1
ATT2DB
2
ATC
3 SOFTMUTE
4
IZD
6:5 ZEROFLR
[1:0]
7
AMUTE
Table 57 R4 Volume Control Register
DEFAULT
0
0
0
0
0
00
0
DESCRIPTION
Ramps volume from existing attenuation setting to new setting when
UPDATE applied.
0: Step volume change
1: Ramp volume change
Anti-clipping mode control. Attenuates PCM gain path by 2 dB:
0: 0dB gain
1: -2dB gain
Attenuator Control Mode:
0 = Right channels use Right attenuation
1 = Right Channels use Left Attenuation
Soft mute select
0: Normal Operation
1: Soft mute both channels
Enables infinite zero detect (detects 1024 zeros on input):
0 = Disable infinite zero detect
1 = Enable infinite zero detect
Zero flag output:
00 = Pin assigned to logical AND of LEFT and RIGHT channels
01 = Pin assigned to LEFT channel
10 = Pin assigned to RIGHT channel
11 = ZFLAG disabled
Applies analogue mute in DSD mode
0 = Normal operation
1 = Analogue mute applied
REGISTER
ADDRESS
R5
Format
Control
05h
BITS
[1:0]
NAME
IWL[1:0]
[3:2] FMT[1:0]
4
LRP
5
BCP
6
REV
7
PWDN
Table 58 R5 Format Control Register
DEFAULT DESCRIPTION
10
Audio interface input word length.
00 = 16-bit
01 = 20-bit
10 = 24-bit
11 = 32-bit
10
Audio data format select.
00 = right justified mode
01 = left justified mode
10 = I2S mode
11 = DSP mode
0
Polarity select for LRCLK/DSP mode select.
0 = normal LRCLK polarity/DSP mode A
1 = inverted LRCLK polarity/DSP mode B
0
BCLK / DSD64CLK polarity select:
0 = normal polarity
1 = inverted polarity
0
Analogue output phase control:
0 = Normal
1 = Inverted
0
Power Down Mode Select:
0 = Normal Mode
1 = Power Down Mode
w
PD, Rev 4.3, February 2013
46
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