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ADV7280-M read  register

Question asked by phantom on Aug 3, 2017
Latest reply on Sep 19, 2017 by JeyasudhaMuthuPerumal

Hi,

My customer is designing ADV7280-M,at present,they can write register but can not read register.

We test supply power as below:

DVDDIO=3.3V,DVDD=1.8V,PVDD=1.8V,AVDD=1.8V,MVDD=1.8V.

RESET and PWRDWN pin is pulled-up to DVDDIO.

SDA and SCL pin is pulled-up  to DVDDIO by 33ohm.

use 400 kHz I2C speed

We try read form use map register 0x11,attached is time  sequence,blue is SDA,yellow is SCL.

Could you give some comments/suggetions?thanks a lot!

 

best regards

 

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