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ADV7842: Strange identification with STDI

Question asked by Captcha on Jul 8, 2013
Latest reply on Jul 9, 2013 by GuenterL

Hello

 

i use the STDI block to try to identify the input video mode on the RGB input of the ADV7842.

The stdi is in free run.

 

When i setup the resolution of my laptop to  1600x1200@60hz the LCVS value is not always the same .

I explain .

 

i setup in first 1600x1200 and then i set up 1280x1024 and then i setup again 1600x1200.

 

 

Laptop Resolution
STDI_LCVS
STDI_BL
STDI_LCF
STDI_FCL
1600x12003304812491866
1280x10243357210651863
1600x12005304812491866

 

The value of LCVS as changed from 3 to 5 . And 5 is not the standard value for this mode.

 

It a problem of my laptop or i have missed something.

 

thank you

Captcha

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