WM8741_09 Datasheet, PDF (47/64 Pages) Wolfson Microelectronics plc – 24-bit 192kHz DAC with Advanced Digital Filtering

Production Data
REGISTER
ADDRESS
R6
Filter Control
06h
BITS
[2:0]
NAME
FIRSEL
[4:3] DSDFILT
[6:5] DEEMPH
[1:0]
7
ZFLAG_HI
Table 59 R6 Filter Control Register
DEFAULT DESCRIPTION
000
Select advanced digital filter response:
000 = Response 1
001 = Response 2
010 = Response 3
011 = Response 4
100 = Response 5
00
Select DSD compensation filter response:
00 = Response 1
01 = Response 2
10 = Response 3
11 = Response 4
00
De-emphasis mode select:
00 = De-emphasis Off
01 = De-emphasis 32kHz
10 = De-emphasis 44.1kHz
11 = De-emphasis 48kHz
0
ZFLAG Force High Control
0 = Normal operation
1 = Output Logic 1
WM8741
REGISTER
ADDRESS
R7
Mode Control 1
07h
BITS
[1:0]
NAME
MODESEL
[1:0]
[4:2]
SR[3:0]
[6:5] OSR[1:0]
7
MODE8X
Table 60 R7 Mode Control Register 1
DEFAULT DESCRIPTION
00
DSD/PCM mode select.
00 = PCM mode
01 = DSD Direct mode
10 = DSD Plus mode
11 = Unused
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
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
0
8FS mode select:
0 = Normal operation
1 = 8FS mode (digital filters bypassed)
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PD, Rev 4.2, October 2009
47