Selecting Primary Mode And Video Standard For Hdmi Modes; Hdmi Decimation Modes - Analog Devices Advantiv ADV7604 Hardware Manual

4.2

Selecting Primary Mode and Video Standard for HDMI Modes

The HDMI receiver decodes and processes any applied HDMI stream irrespective of the video
resolution. However, there are many Primary Mode and Video Standards settings in order to define
how the decoded video data that is routed to the DPP and CP blocks is processed. This allows for
free run features and data decimation modes that some systems may require.
If free run and decimation are not required it is recommended to set the following configuration for
HDMI mode:
• PRIM_MODE[3:0]: 0x06
• VID_STD[5:0]: 0x02
4.3

HDMI Decimation Modes

Some of the modes defined by
main clock generator and the decimation filters in the DPP block are configured automatically. This
ensures the correct data rate at the input to the CP block. Refer to Section
on the automatic configuration and manual options of the DPP block.
The ADV7604 correctly decodes and processes any incoming HDMI stream with the required
decimation irrespective of its video resolution.
• In 1x1 mode (i.e. without decimation) as long the
programmed for any HDMI mode without decimation.
For example:
Set PRIM_MODE
Set PRIM_MODE
Set PRIM_MODE
• In 2x1 decimation mode as long the
for any HDMI mode with 2x1 decimation.
For example:
Set PRIM_MODE
Set PRIM_MODE
Note that decimating the video data from an HDMI stream is optional and should only be performed
if it is required by the downstream devices connected to the ADV7604.
Rev. F August 2010
VID_STD have an inherent 2x1 decimation. For these modes, the
to 0x5 and VID_STD
to 0x5 and VID_STD
to 0x6 and VID_STD
PRIM_MODE
to 0x5 and VID_STD
to 0x5 and VID_STD
54
8.3
PRIM_MODE and VID_STD
to 0x00
to 0x13
to 0x02
and VID_STD registers are programmed
to 0x0C
to 0x19
ADV7604
for more information
registers are