wm8982gefl-v Wolfson Microelectronics plc, wm8982gefl-v Datasheet - Page 56

• Manufacturer Part Number: wm8982gefl-v
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

WM8982
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Table 44 MONOOUT Boost Stage Control
Table 45 MONOOUT Boost Stage Details
ENABLING THE OUTPUTS
Each analogue output of the WM8982 can be separately enabled or disabled. The analogue mixer
associated with each output has a separate enable. All outputs are disabled by default. To save
power, unused parts of the WM8982 should remain disabled. The SLEEP bit should only be set on
to reduce residual device currents once all the other power management bits have been set to off.
Outputs can be enabled at any time, but it is not recommended to do so when BUFIO is disabled
(BUFIOEN=0) or when BUFDCOP is disabled (BUFDCOPEN=0) when configured in output boost
mode, as this may cause pop noise (see “Power Management” and “Applications Information”
sections).
Table 46 Output Stages Power Management Control
R49
Output control
R1
Power
management
1
R1
Power
Management
1
R2
Power
Management
2
R3
Power
Management
3
Note: All “Enable” bits are 1 = ON, 0 = OFF
MONOBOOST
REGISTER
ADDRESS
REGISTER
ADDRESS
0
1
3
8
2
6
8
6
2
3
4
5
6
7
BIT
BIT
STAGE GAIN
OUTPUT
1.5x
MONOBOOST
BUFDCOPEN
BUFIOEN
MONOMIXEN
BUFDCOPEN
SLEEP
MIX1EN
MIX2EN
VBUFEN
SPKOUTNEN
SPKOUTPEN
MONOOUTEN
1x
LABEL
LABEL
OUTPUT DC
1.5xAVDD/2
AVDD/2
LEVEL
0
0
0
0
0
0
0
0
0
0
DEFAULT
0
DEFAULT
0
CONFIGURATION
OUTPUT STAGE
Unused input/output tie off buffer enable
MONOOUT mixer enable
Output stage 1.5xAVDD/2 driver enable
0 = normal device operation
1 = residual current reduced in device
standby mode if clocks still running
Mixer 1 enable
Mixer 2 enable
Video buffer enable
SPKOUTN output enable
SPKOUTP output enable
MONOOUT enable
Non-inverting
Inverting
1 = MONOOUT output gain = +1.5
Dedicated buffer for DC level shifting
output stages when in 1.5x gain
boost configuration.
0=Buffer disabled
1=Buffer enabled (required for 1.5x
gain boost)
0 = MONOOUT output gain = -1;
DC = AVDD / 2
DC = 1.5 x AVDD / 2
PP, Rev 3.2, September 2008
DESCRIPTION
DESCRIPTION
Pre-Production
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