wm8742 Wolfson Microelectronics plc, wm8742 Datasheet - Page 47

• Manufacturer Part Number: wm8742
• Description: 24-bit 192khz Dac With Advanced Digital Filtering
• Manufacturer: Wolfson Microelectronics plc

Production Data
Table 59 R6 Filter Control Register
Table 60 R7 Mode Control Register 1
w
Mode Control 1
Filter Control
REGISTER
REGISTER
ADDRESS
ADDRESS
06h
07h
R6
R7
BITS
BITS
[2:0]
[4:3]
[6:5]
[1:0]
[4:2]
[6:5]
7
7
MODESEL
ZFLAG_HI
DEEMPH
MODE8X
DSDFILT
OSR[1:0]
FIRSEL
SR[3:0]
NAME
NAME
[1:0]
[1:0]
DEFAULT
DEFAULT
000
000
00
00
00
00
0
0
DESCRIPTION
Select advanced digital filter response:
000 = Response 1
001 = Response 2
010 = Response 3
011 = Response 4
100 = Response 5
Select DSD compensation filter response:
00 = Response 1
01 = Response 2
10 = Response 3
11 = Response 4
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
DESCRIPTION
DSD/PCM mode select.
00 = PCM mode
01 = DSD Direct mode
10 = DSD Plus mode
11 = Unused
MCLK to LRCLK sampling rate ratio control:
000 = auto detect sample rate
001 = 128fs
010 = 192fs
011 = 256fs
100 = 384fs
101 = 512fs
110 = 768fs
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
8FS mode select:
0 = Normal operation
1 = 8FS mode (digital filters bypassed)
PD, Rev 4.2, August 2009
WM8742
47