Infoframe Registers; Infoframe Collection Mode; Infoframe Checksum Error Flags - Analog Devices ADV8003 Hardware Manual

5.9. INFOFRAME REGISTERS

In HDMI, the auxiliary data is carried across the digital link using a series of packets. The ADV8003 Serial Video Rx can automatically
detect and store the following HDMI packets:
• InfoFrames
• Audio content protection
• International Standard Recording Code (ISRC)
• Gamut metadata
Section 5.9.1 explains the method through which the ADV8003 can extract and store these InfoFrames.
5.9.1.

InfoFrame Collection Mode

The ADV8003 has two modes for storing the InfoFrame packets sent from the source into the internal memory. By default, the ADV8003
only stores the InfoFrame packets received if the checksum is correct for each InfoFrame.
The ADV8003 also provides a mode to store every InfoFrame sent from the source, regardless of an InfoFrame packet checksum error.
This can be configured by setting
always_store_inf, HDMI RX Map, Address 0xE247[0]
This bit is used to force InfoFrames with checksum errors to be stored.
Function
always_store_inf
0 
1
5.9.2.

InfoFrame Checksum Error Flags

To determine if a checksum error has occurred with the InfoFrame packets, the user can poll the various status bits in the IO Map. There
are several interrupt flags in the IO Map which indicate the status of the various InfoFrames. Refer to
Serial Video Rx interrupts.
Rev. B, August 2013
always_store_inf to 1.
Description
Stores data from received InfoFrames only if their checksum is correct
Always store the data from received InfoFrame regardless of their checksum
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ADV8003 Hardware Manual
Section 9.2.2 for more details on the