WM8978_06 Wolfson Microelectronics Ltd., WM8978_06 Datasheet - Page 70

• Manufacturer Part Number: WM8978_06
• Description: Stereo Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8978
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Figure 35 Outputs OUT3 and OUT4
Table 49 OUT3 and OUT4 Boost Stages Control
Table 50 OUT3/OUT4 Output Boost Stage Details
R49
Output control
R1
Power
management
1
OUT3BOOST/
OUT4BOOST
REGISTER
ADDRESS
0
1
3
4
8
BIT
STAGE GAIN
OUTPUT
1.5x
1x
OUT3BOOST
OUT4BOOST
BUFDCOPEN
LABEL
OUTPUT DC
1.5xAVDD/2
AVDD/2
LEVEL
0
DEFAULT
0
0
CONFIGURATION
OUTPUT STAGE
Non-inverting
Inverting
1 = OUT3 output gain = +1.5
1 = OUT4 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 = OUT3 output gain = -1;
0 = OUT4 output gain = -1;
DC = AVDD / 2
DC = 1.5 x AVDD / 2
DC = AVDD / 2
DC = 1.5 x AVDD / 2
DESCRIPTION
PP Rev 3.0 May 2006
Pre-Production
70