WM8753 Wolfson Microelectronics plc, WM8753 Datasheet - Page 39

• Manufacturer Part Number: WM8753
• Description: HI FI AND TELEPHONY DUAL CODEC
• Manufacturer: Wolfson Microelectronics plc

WM8753L
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Table 28 HiFi DAC Control
Table 29 HiFi DAC Mono Mix and Phase Invert Select
The digital audio data is converted to oversampled bit streams in the on-chip, true 24-bit digital
interpolation filters. The bitstream data enters two multi-bit, sigma-delta DACs, which convert them to
high quality analogue audio signals. The multi-bit DAC architecture reduces high frequency noise and
sensitivity to clock jitter. It also uses a Dynamic Element Matching technique for high linearity and low
distortion.
In normal operation, the left and right channel digital audio data is converted to analogue in two
separate DACs. There is also a mono-mix mode where the two audio channels are mixed together
digitally, controlled by the DMONOMIX register bits which allow the digital mono mix to be applied to
left, right or both DAC channels. If only one DAC channel is being used for the mono mix the other
can be powered down.
The DAC output defaults to non-inverted. Setting DACINV will invert the DAC output phase on both
left and right channels.
R1 (01h)
DAC Control
R1 (01h)
DAC Control
REGISTER
REGISTER
ADDRESS
ADDRESS
5:4
2:1
BIT
6
BIT
3
DMONOMIX
[1:0]
DACINV
DEEMP
[1:0]
DACMU
LABEL
LABEL
00
1
DEFAULT
DEFAULT
00
0
De-emphasis Control
11 = 48kHz sample rate
10 = 44.1kHz sample rate
01 = 32kHz sample rate
00 = No De-emphasis
Digital Soft Mute
1 = mute
0 = no mute (signal active)
DAC Mono Mix
00: stereo
01: mono ((L+R)/2) into DACL, ‘0’ into
DACR
10: mono ((L+R)/2) into DACR, ‘0’ into
DACL
11: mono ((L+R)/2) into DACL and
DACR
DAC Phase Invert
0 : non-inverted
1 : inverted
DESCRIPTION
DESCRIPTION
AI Rev 3.1 June 2004
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