Production Data
WM8741
REGISTER
ADDRESS
R6
BITS
NAME
DEFAULT
DESCRIPTION
[2:0]
FIRSEL
000
Select advanced digital filter response:
000 = Response 1
Filter Control
06h
001 = Response 2
010 = Response 3
011 = Response 4
100 = Response 5
[4:3]
[6:5]
7
DSDFILT
00
00
0
Select DSD compensation filter response:
00 = Response 1
01 = Response 2
10 = Response 3
11 = Response 4
DEEMPH
[1:0]
De-emphasis mode select:
00 = De-emphasis Off
01 = De-emphasis 32kHz
10 = De-emphasis 44.1kHz
11 = De-emphasis 48kHz
ZFLAG Force High Control
0 = Normal operation
1 = Output Logic 1
ZFLAG_HI
Table 59 R6 Filter Control Register
REGISTER
ADDRESS
R7
BITS
NAME
DEFAULT
DESCRIPTION
[1:0]
MODESEL
[1:0]
00
DSD/PCM mode select.
00 = PCM mode
Mode Control 1
07h
01 = DSD Direct mode
10 = DSD Plus mode
11 = Unused
[4:2]
SR[3:0]
000
MCLK to LRCLK sampling rate ratio control:
000 = auto detect sample rate
001 = 128fs
010 = 192fs
011 = 256fs
100 = 384fs
101 = 512fs
110 = 768fs
[6:5]
OSR[1:0]
MODE8X
00
Selects low, medium or high sample rate mode for filter selection
(equivalent to OSR pin functionality in Hardware Mode)
00 = Low rate (32/44.1/48kHz)
01 = Medium rate (96kHz)
10 = High rate (192kHz)
11 = Unused
7
0
8FS mode select:
0 = Normal operation
1 = 8FS mode (digital filters bypassed)
Table 60 R7 Mode Control Register 1
PD, Rev 4.2, October 2009
47
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
