wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 19

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
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Table 9 Input PGA Software Control
R0 (00h)
Left Channel
PGA
R1 (01h)
Right Channel
PGA
R23 (17h)
Additional
Control (1)
REGISTER
ADDRESS
8
7
6
5:0
8
7
6
5:0
0
BIT
LIVU
LINMUTE
LZCEN
LINVOL
[5:0]
RIVU
RINMUTE
RZCEN
RINVOL
[5:0]
TOEN
LABEL
0
1
0
010111
( 0dB )
0
1
0
010111
( 0dB )
0
DEFAULT
Left Volume Update
0 = Store LINVOL in intermediate
latch (no gain change)
1 = Update left and right channel
gains (left = LINVOL, right =
intermediate latch)
Left Channel Input Analogue Mute
1 = Enable Mute
0 = Disable Mute
Note: LIVU must be set to un-mute.
Left Channel Zero Cross Detector
1 = Change gain on zero cross only
0 = Change gain immediately
Left Channel Input Volume Control
111111 = +30dB
111110 = +29.25dB
. . 0.75dB steps down to
000000 = -17.25dB
Right Volume Update
0 = Store RINVOL in intermediate
latch (no gain change)
1 = Update left and right channel
gains (right = RINVOL, left =
intermediate latch)
Right Channel Input Analogue Mute
1 = Enable Mute
0 = Disable Mute
Note: RIVU must be set to un-mute.
Right Channel Zero Cross Detector
1 = Change gain on zero cross only
0 = Change gain immediately
Right Channel Input Volume Control
111111 = +30dB
111110 = +29.25dB
. . 0.75dB steps down to
000000 = -17.25dB
Timeout Enable
0 : Timeout Disabled
1 : Timeout Enabled
DESCRIPTION
PD, Rev 4.0, October 2008
WM8988
19