WM8753 Wolfson Microelectronics plc, WM8753 Datasheet - Page 23

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

WM8753L
w
Table 7 Mono Mixing
Table 6 Record Mixer Input Select and Gain Control
MONO MIXING
The stereo ADC can operate as a stereo or mono device, or the two channels can be mixed to mono,
either in the analogue domain (in the front end of the ADC) or in the digital domain (after the ADC).
MONOMIX selects the mode of operation. For analogue mono mix either the left or right channel ADC
can be used, allowing the unused ADC to be powered off or used for a dc measurement conversion.
The user also has the flexibility to select the data output from the audio interface using DATSEL. The
default is for left and right channel ADC data to be output, but the interface may also be configured so
that e.g. left channel ADC data is output as both left and right data for when an analogue mono mix is
selected.
Note:
If DC measurement is selected this overrides the MONOMIX selection.
R32 (20h)
Record Mix (1)
R33 (21h)
Record Mix (2)
R46 (2Eh)
ADC
Mode
REGISTER
ADDRESS
REGISTER
ADDRESS
input
5:4
BIT
6:4
2:0
2:0
BIT
7
3
3
MONOMIX[1:0]
RSEL
RRECVOL
[2:0]
LSEL
LRECVOL[2:0]
MSEL
MRECVOL
[2:0]
LABEL
LABEL
00
DEFAULT
0
101
(0dB)
0
101
(0dB)
0
101
DEFAULT
00: Stereo
01: Analogue Mono Mix (using left ADC)
10: Analogue Mono Mix (using right ADC)
11: Digital Mono Mix
Record Mixer Select Right Mix
0 : Right Mix not selected into Record
mixer
1 : Right mix selected into Record
mixer
Right mixer signal to Record mixer
Volume
000 = +6dB
… (3dB steps)
111 = -15dB
0 : Left Mix not selected into Record
mixer
1 : Left mix selected into Record mixer
Left mixer signal to Record mixer
Volume
000 = +6dB
… (3dB steps)
111 = -15dB
Record Mixer Select Mono Mix
0 : Mono Mix not selected into Record
mixer
1 : Mono mix selected into Record
mixer
Mono mixer signal to Record mixer
Volume
000 = +6dB
… (3dB steps)
111 = -15dB
Record Mixer Select Left Mix
DESCRIPTION
DESCRIPTION
AI Rev 3.1 June 2004
Advanced Information
23