wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 74

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

WM8400
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DIGITAL MIXING
The ADC and DAC data can be combined in various ways to support a range of different usage
modes.
Data from either of the two ADCs can be routed to either the left or the right channel of the digital
audio interface. In addition, data from either of the digital audio interface channels can be routed to
either the left or the right DAC. See "Digital Audio Interface" for more information on the audio
interface.
DIGITAL MIXING PATHS
Figure 31 shows the digital mixing paths available in the WM8400 digital core.
Figure 31 Digital Mixing Paths
ADCR_ENA
ADCL_ENA
ADC
ADC
en
en
ADC_HPF_CUT
MAIN REGISTER BIT REFERENCE
READBACK AVAIABLE
REGISTER BIT ALSO REFERENCED
ELSEWHERE IN DIAGRAM
OR HI-FI)
OR HI-FI)
FILTER
(VOICE
FILTER
(VOICE
PASS
PASS
HIGH
HIGH
[1:0]
ADCR_DATINV
ADCL_DATINV
AIFADCR_SRC
AIFADCL_SRC
en
en
ADC_HPF_ENA
ADCL_VOL
[7:0]
ADCR_VOL
[7:0]
R
ADCR_DAC_SVOL
[7:0]
ADCL_DAC_SVOL
[7:0]
DIGITAL AUDIO
L
A-law and u-law support
INTERFACE
TDM Support
ADC_TO_DACR
ADC_TO_DACL
00=0
01=ADCL
10=ADCR
11=Reserved
0
0
R
[1:0]
[1:0]
+
+
DIGITAL CORE
DACL_VOL
DACR_VOL
L
DAC_BOOST
[1:0]
DACL_DATINV
DACR_DATINV
[7:0]
[7:0]
MONO
DACL_SRC
DACR_SRC
DAC_MUTEMODE,
DAC_MUTERATE,
Alternative DAC Interface
Alternative MCLK
Button Control / Accessory Detect
Clock Output
Inverted ADCLRC
+
DAC_SB_FILT,
DAC_MUTE,
DEEMP[1:0]
DAC_BOOST
00 = 0dB
01 = +6dB
10 = +12dB
11 = +18dB
DAC_MONO
GPIO
DAC
DAC
DACL
DACR
en
en
PP, April 2009, Rev 3.0
Pre-Production
74