Infoframes Registers; Infoframe Collection Mode; Infoframe Checksum Error Flags - Analog Devices ADV7850 Hardware Manual

InfoFrames Registers

7.34.1
The ADV7850 can store the following InfoFrames:
• Auxiliary Video Information (AVI) InfoFrame
• Source Production Descriptor (SPD) InfoFrame
• Audio InfoFrame
• Moving Picture Expert Group (MPEG) Source InfoFrame

InfoFrame Collection Mode

7.34.2
The ADV7850 has two modes for storing the InfoFrame packet sent from the source into the internal memory. By default, the ADV7850
only stores the InfoFrame packets received if the checksum is correct for each InfoFrame.
The ADV7850 also provides a mode to store every InfoFrame sent from the source, regardless of an InfoFrame packet checksum error.
always_store_inf, Addr 68 (HDMI), Address 0x47[0]
This control is used to force InfoFrames with checksum errors to be stored.
Function
always_store_inf
0 
1

InfoFrame Checksum Error Flags

7.34.3
The following checksum error status registers flag when the last InfoFrame received has a checksum error. Once set, these bits remain
high until the interrupt is cleared via their corresponding clear bits.
avi_inf_cks_err_raw, IO, Address 0x88[4] (Read Only)
This readback displays the status of the AVI InfoFrame checksum error interrupt signal. When set to 1, it indicates that a checksum
error was detected for an AVI InfoFrame. Once set, this bit remains high until it is cleared via avi_inf_cks_err_clr.
Function
avi_inf_cks_err_raw
0 
1
aud_inf_cks_err_raw, IO, Address 0x88[5] (Read Only)
This readback displays the status of the audio InfoFrame checksum error interrupt signal. When set to 1, it indicates that a checksum
error was detected for an audio InfoFrame. Once set, this bit remains high until it is cleared via audio_inf_cks_err_clr.
Function
aud_inf_cks_err_raw
0 
1
spd_inf_cks_err_raw, IO, Address 0x88[6] (Read Only)
This readback displays the status of the SPD InfoFrame checksum error interrupt signal. When set to 1, it indicates that a checksum
error was detected for an SPD InfoFrame. Once set, this bit remains high until it is cleared via spd_inf_cks_err_clr.
Rev. A May 2012
Description
Store data from received InfoFrames only if their checksum correct
Always store data from received InfoFrame regardless of their checksum
Description
No AVI InfoFrame checksum error occurred
An AVI InfoFrame checksum error occurred
Description
No audio InfoFrame checksum error occurred
Audio InfoFrame checksum error occurred
201
ADV7850