Hdmi Decimation Modes; Primary Mode And Video Standard Configuration For Hdmi Free Run - Analog Devices ADV7610 Hardware User's Manual

UG-438
PRIM_MODE[3:0]
Code Description
1010 Reserved
1011 Reserved
1100 Reserved
1101 Reserved
1110 Reserved
1111 Reserved
V_FREQ
This control is set to allow free run to work correctly (refer to Table 7).
V_FREQ[2:0], IO, Address 0x01[6:4]
A control to set vertical frequency.
Function
V_FREQ[2:0]
000 (default)
001
010
011
100
101
110
111

HDMI DECIMATION MODES

Some of the modes defined by VID_STD have an inherent 2×1 decimation. For these modes, the main clock generator and the decim-
ation filters in the DPP block are configured automatically. This ensures the correct data rate at the input to the CP block. Refer to the
Data Preprocessor and Color Space Conversion and Color Controls section for more information on the automatic configuration of the
DPP block.
The ADV7610 correctly decodes and processes any incoming HDMI stream with the required decimation, irrespective of its video
resolution:
•
In 1×1 mode (that is, without decimation), as long the PRIM_MODE and VID_STD registers are programmed for any HDMI mode
without decimation.
For example:
•
Set PRIM_MODE to 0x5 and VID_STD to 0x00
•
Set PRIM_MODE to 0x5 and VID_STD to 0x13
•
Set PRIM_MODE to 0x6 and VID_STD to 0x02
•
In 2×1 decimation mode, as long the PRIM_MODE and VID_STD registers are programmed for any HDMI mode with 2×1
decimation. For example:
•
Set PRIM_MODE to 0x5 and VID_STD to 0x0C
•
Set PRIM_MODE to 0x5 and VID_STD to 0x19
Note: Decimating the video data from an HDMI stream is optional and should be performed only if it is required by the downstream
devices connected to the ADV7610.

PRIMARY MODE AND VIDEO STANDARD CONFIGURATION FOR HDMI FREE RUN

If free run is enabled in HDMI mode, PRIM_MODE[3:0] and VID_STD[5:0] specify the input resolution expected by the
free run Mode 1) and/or the output resolution to which the
Mode section for additional details on the free run feature for HDMI inputs and to HDMI_FRUN_MODE.
Processor Code
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
ADV7610
Rev. 0 | Page 20 of 184
VID_STD[5:0]
Input Video Output Resolution
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Description
60 Hz
50 Hz
30 Hz
25 Hz
24 Hz
Reserved
Reserved
Reserved
free runs (for free run Mode 0 and Mode 1). Refer to the Free Run
Hardware User Guide
Comment
ADV7610 (for