WM8956 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'WM8956' PDF : 80 Pages View PDF
WM8956
Production Data
REGISTER BITS BY ADDRESS
REGISTER BIT
ADDRESS
R0 (00h) 8
Left Input
Volume
LABEL
IPVU
DEFAULT
N/A
7
LINMUTE
1
6
LIZC
5:0 LINVOL[5:0]
0
010111
R1 (01h) 8
IPVU
N/A
Right Input
Volume
7
RINMUTE
1
6
RIZC
5:0 RINVOL[5:0]
0
010111
R2 (02h) 8
OUT1VU
N/A
LOUT1
Volume
7
LO1ZC
0
6:0 LOUT1VOL[6:0]
0000000
R3 (03h) 8
OUT1VU
N/A
ROUT1
Volume
7
RO1ZC
0
DESCRIPTION
Input PGA Volume Update
Writing a 1 to this bit will cause left and right
input PGA volumes to be updated (LINVOL and
RINVOL)
Left Input PGA Analogue Mute
1 = Enable Mute
0 = Disable Mute
Note: IPVU must be set to un-mute.
Left Input PGA Zero Cross Detector
1 = Change gain on zero cross only
0 = Change gain immediately
Left Input PGA Volume Control
111111 = +30dB
111110 = +29.25dB
. . 0.75dB steps down to
000000 = -17.25dB
Input PGA Volume Update
Writing a 1 to this bit will cause left and right
input PGA volumes to be updated (LINVOL and
RINVOL)
Right Input PGA Analogue Mute
1 = Enable Mute
0 = Disable Mute
Note: IPVU must be set to un-mute.
Right Input PGA Zero Cross Detector
1 = Change gain on zero cross only
0 = Change gain immediately
Right Input PGA Volume Control
111111 = +30dB
111110 = +29.25dB
. . 0.75dB steps down to
000000 = -17.25dB
Headphone Output PGA Volume Update
Writing a 1 to this bit will cause left and right
headphone output volumes to be updated
(LOUT1VOL and ROUT1VOL)
Left Headphone Output Zero Cross Enable
0 = Change gain immediately
1 = Change gain on zero cross only
LOUT1 Volume
1111111 = +6dB
… 1dB steps down to
0110000 = -73dB
0101111 to 0000000 = Analogue MUTE
Headphone Output PGA Volume Update
Writing a 1 to this bit will cause left and right
headphone output volumes to be updated
(LOUT1VOL and ROUT1VOL)
Right Headphone Output Zero Cross Enable
0 = Change gain immediately
1 = Change gain on zero cross only
REFER TO
Input Signal
Path
Input Signal
Path
Input Signal
Path
Input Signal
Path
Input Signal
Path
Input Signal
Path
Input Signal
Path
Input Signal
Path
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
w
PD, November 2011, Rev 4.1
60
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