Hdcp Decryption - Vizio VX32L Service Manual

The wm8776 has two possible device addresses, which can be selected using the CE pin
In the VX32L LCD TV CE pin is High (device address is 36h)
In the VX32L wm8776 has 2-wire interface

3. HDCP Decryption

HDCP decryption contains all necessary logic to decrypt the incoming audio and video
data. The decryption process is entirely controlled by the host microprocessor through a
set sequence of register reads and wires through the DDC channel. Pre-programmed
HDCP keys and key Selection Vector are used in the decryption process. A resulting
calculated to an XOR mask during each clock cycle to decrypt the audio/video data in
sync with the host.
CONFIDENTIAL DO NOT COPY
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Page 7-10
File No. SG-0204