Product Preview
WM8777
REGISTER ADDRESS
(28h)
BIT
3:0
8
LABEL
FBASS[3:0]
UPDATE
DEFAULT DESCRIPTION
0000 Gain control for Bass boost/cut
Front Bass Control
Not latched Controls simultaneous update of
all Attenuation Latches
0 = Store GAIN FRONT BASS in
intermediate latch (no change to
output)
1 = Store GAIN FRONT BASS
and update attenuation on all
channels.
(29h)
3:0
8
FTREB[3:0]
UPDATE
0000
Gain control for Bass boost/cut
Front Treble Control
Not latched Controls simultaneous update of
all Attenuation Latches
0 = Store GAIN FRONT TREBLE
in intermediate latch (no change to
output)
1 = Store GAIN FRONT TREBLE
and update attenuation on all
channels.
(2Ah)
3:0
8
CBASS[3:0]
UPDATE
0000
Gain control for Bass boost/cut
Center Bass Control
Not latched Controls simultaneous update of
all Attenuation Latches
0 = Store GAIN CENTER BASS in
intermediate latch (no change to
output)
1 = Store GAIN CENTER BASS
and update attenuation on all
channels.
(2Bh)
3:0
8
CTREB[3:0]
UPDATE
0000
Gain control for Bass boost/cut
Center Treble Control
Not latched Controls simultaneous update of
all Attenuation Latches
0 = Store GAIN CENTER TREBLE
in intermediate latch (no change to
output)
1 = Store GAIN CENTER TREBLE
and update attenuation on all
channels.
Table 4 Tone Control Gain Registers
TONE CONTROL PRE-GAIN
The tone pre-gain is applied directly before the analogue volume control for a channel. This is to
allow scaling of the channel response prior to the overall channel volume control.
Each of the front right, left and centre channels accept their own 2-bit gain code to determine to
amount of attenuation applied. The Attenuation levels are given in Table 5.
PRE-GAIN[0:1]
ATTENUATION
0dB
00
01
10
11
-6dB
-12dB
-18dB
Table 5 Tone Control Pre-Gain Attenuation
PP Rev 1.94 November 2004
17
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
