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ADV7182 switches standard when no input

Question asked by Sureshd on Jan 9, 2015
Latest reply on Jan 12, 2015 by mattp



I have enabled the interrupt for changes in the AD_RESULT bit.

When there is no CVBS input provided to the ADV7182 chip, I noticed the register 0x10 AD_RESULT bit is changing in uneven period of time which causes interrupt to occur.

I do not see this problem when the actual input is provided.

Why the AD_RESULT bit is switching the standard between NTSC & PAL when there is no input provided to the ADV7182 chip?

What could be the root cause for this issue?

- Suresh