WM8985_07 WOLFSON [Wolfson Microelectronics plc], WM8985_07 Datasheet - Page 31

• Manufacturer Part Number: WM8985_07
• Description: Multimedia CODEC With Class D Headphone and Line Out
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
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Table 7 Input PGA Volume Control
R45 (20h)
Left channel
input PGA
volume
control
R46 (2Eh)
Right
channel
input PGA
volume
control
R32 (20h)
ALC control
1
REGISTER
ADDRESS
5:0
6
7
8
5:0
6
7
8
8:7
BIT
INPPGAVOLL
INPPGAMUTEL
INPPGAZCL
INPPGAVU
INPPGAVOLR
INPPGAMUTER
INPPGAZCR
INPPGAVU
ALCSEL
LABEL
010000
(0dB)
0
0
Not
latched
010000
(0dB)
0
0
Not
latched
00
DEFAULT
Left channel input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = +35.25dB
Mute control for left channel input PGA:
0 = Input PGA not muted, normal
operation
1 = Input PGA muted (and disconnected
from the following input BOOST stage).
Left channel input PGA zero cross
enable:
0 = Update gain when gain register
changes
1 = Update gain on 1
gain register write.
INPPGA left and INPPGA right volume
do not update until a 1 is written to
INPPGAVU (in reg 45 or 46)
(See "Volume Updates" below)
Right channel input PGA volume
000000 = -12dB
000001 = -11.25db
.
010000 = 0dB
.
111111 = +35.25dB
Mute control for right channel input
PGA:
0 = Input PGA not muted, normal
operation
1 = Input PGA muted (and disconnected
from the following input BOOST stage).
Right channel input PGA zero cross
enable:
0 = Update gain when gain register
changes
1 = Update gain on 1
gain register write.
INPPGA left and INPPGA right volume
do not update until a 1 is written to
INPPGAVU (in reg 45 or 46)
(See "Volume Updates" below)
ALC function select:
00 = ALC off
01 = ALC right only
10 = ALC left only
11 = ALC both on
DESCRIPTION
PP, Rev 3.5, January 2007
st
st
zero cross after
zero cross after
WM8985
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