Vizio P42HDTV10A Service Manual page 84

b. 2 Wire serial control mode
The wm8776 supports software control via a 2-wire serial bus. Many devices can be controlled
by the same bus, and each device has a uni ue 7-bit address (this is not the same as the 7-bit
address of each register in the wm8776). The wm8776 operates as a slave device only.
2-wire serial interface as shown in the following figure.
The wm8776 has two possible device addresses, which can be selected using the CE pin
In the L37 LCD TV CE pin is LOW (device address is 34h).
In the L37 wm8776 has 2-wire interface
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File No. SG-0184