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ADV7842 SDPIO(0x94)

Question asked by wallman16 on Jun 19, 2012
Latest reply on Jun 19, 2012 by GuenterL

Hi ,

 

Could you please let me know with regards to SDPIO(94) Address = 0xCE and 0xCF .

 

We have some issue in certian condition when we get Black screen or Chequered output , we using a Switch before ADV7842 to change the input from VBS to 480p.

 

During the problem we see the DDR related pin is not working , and we see that SDPIO(0x94) Address = 0xCE and 0xCF is fixed to some value.

 

When we see that SDPIO(0x94) Address = 0xCE and 0xCF is not changing we reset the memory by sending SDPIO(0x94) Address 0x60 to 0x01 and IO(0x40) Address 0xFF to 0x04.

 

Can you also let me know if there is a way to find out if there is illegal memory operation .

 

Thanking you

With best regards and wishes

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