wm8742 Wolfson Microelectronics plc, wm8742 Datasheet - Page 35

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

Production Data
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Figure 25 Software Control Mode MUTEB and ZFLAG Configuration
DE-EMPHASIS
Setting the DEEMPH[1:0] register bits enables de-emphasis support in the WM8742 digital filters.
There are three de-emphasis filters, one each for sampling rates of 32kHz, 44.1kHz and 48kHz.
Table 34 De-emphasis Control
OUTPUT PHASE REVERSAL
The REV register bit controls the phase of the output signal. Setting the REV bit causes the phase of
the output signal to be inverted.
Note: The REV bit can only be used in stereo mode. When in differential mono mode, the REV bit
must remain set as 0.
Table 35 Output Phase Control
REGISTER ADDRESS
REGISTER ADDRESS
MUTEB
Format Control
Filter Control
06h
05h
DSD Direct
R6
R5
DINR
DINL
[6:5]
BIT
BIT
6
SOFT
L&R
ZDET
DAC
DEEMPH
LABEL
LABEL
ANA
L&R
[1:0]
REV
DEFAULT
DEFAULT
Infinite
Detect
Zero
00
0
De-emphasis mode select:
00 = De-emphasis Off
01 = De-emphasis 32kHz
10 = De-emphasis 44.1kHz
11 = De-emphasis 48kHz
Analogue output phase control:
0 = Normal
1 = Inverted
ZFLAG
DESCRIPTION
DESCRIPTION
PD, Rev 4.2, August 2009
WM8742
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