Hdcp Support - Analog Devices ADV7610 Hardware User's Manual

Hardware User Guide
DEREP_N_OVERRIDE, Addr 68 (HDMI), Address 0x41[4]
This control allows the user to override the pixel repetition factor. The
HDMI_PIXEL_REPETITION[3:0] to discard video pixel data from the incoming HDMI stream.
Function
DEREP_N_OVERRIDE
0 (default)
1
DEREP_N[3:0], Addr 68 (HDMI), Address 0x41[3:0]
Sets the derepetition value if derepetition is overridden by setting DEREP_N_OVERRIDE.
Function
DEREP_N[3:0]
0000 (default)
xxxx
The following registers allow forcing YCrCb 444 and YCrCb 422 regardless of the AVI Infoframe. This feature is useful when the source
switches between YCrCb 444 and YCrCb 422 modes without sending appropriate update in AVI InfoFrame.
FORCE_YCRCB_444, Addr 68 (HDMI), Address 0x46[4]
Forces a 4:4:4 interpretation of the video contents, regardless of the description in the AVI InfoFrame. This bit carries higher priority than
FORCE_YCRCB_422.
Function
FORCE_YCRCB_444
0 (default)
1
FORCE_YCRCB_422, Addr 68 (HDMI), Address 0x47[4]
Forces a 4:2:2 interpretation of the video contents, regardless of the description in the AVI InfoFrame. This bit is only valid if
FORCE_YCRCB_444 is zero.
Function
FORCE_YCRCB_422
0 (default)
1

HDCP SUPPORT

HDCP Decryption Engine
The HDCP decryption engine allows for the reception and decryption of HDCP content-protected video and audio data. In the HDCP
authentication protocol, the transmitter authenticates the receiver by accessing the HDCP registers of the
Once the authentication is initiated, the HDCP decryption integrated in the
video frame. This mask is applied to the incoming data at every clock cycle to yield decrypted video and audio data.
HDCP_A0, Addr 68 (HDMI), Address 0x00[7]
A control to set the second LSB of the HDCP port I
Function
HDCP_A0
0 (default)
1
Description
Automatic detection and processing of procession of pixel repeated modes using the AVI InfoFrame
information.
Enables manual setting of the pixel repetition factor as per DEREP_N[3:0].
Description
DEREP_N+1 indicates the pixel and clock discard factor
DEREP_N+1 indicates the pixel and clock discard factor
Description
Not forced
Forced
Description
Not forced
Forced
2 C address.
Description
I 2 C address for HDCP port is 0x74. Used for single-link mode or 1st Receiver in dual-link mode.
I 2 C address for HDCP port is 0x76. Used only for a second receiver dual-link mode.
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ADV7610 then uses DEREP_N instead of
ADV7610 computes and updates a decryption mask for every
UG-438
ADV7610 over the DDC bus.