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(ADV7511W)CEC fail

Question asked by donadona999s on Nov 6, 2017
Latest reply on Nov 10, 2017 by donadona999s

Hi !

 

I have some questions about ADV7511W.

Our customer are trying to use CEC .

But sometime they fail to communicate by CEC.

They read back all register and found some different between "when CEC is OK " and "when CEC is NOT OK".

 

********************************

(OK result)

0x4b[6-4] = 001

0x4b[3]     = 0

0x4b[2]     = 0

 

(NG result case 1)

0x4b[6-4] = 000

0x4b[3]    = 1

0x4b[2]    = 1

 

(NG result case 2)

0x4b[6-4] = 000

0x4b[3]    = 1

0x4b[2]    = 0

********************************

 

So my question are these.

 

Q1)

At ADV7511W programming guide, this is written.

For 0x4B[6:4] , Programming guide tell how to set device0~2.

What will happen if our customer sets 0x4B[6:4] = 000 ?

 

Q2)

Our customer found 0x4B register was changed.

Would ADV7511W sets 0x4B[6:4] = 000 when something happen?

 

Q3)

For 0x4B[3] and 0x4B[2] , this is written.

Our customer said when they don't fail CEC , 0x4B[3] = 0x4B[2] = 0.

But when our customer fail CEC ,these register changes.

Do you think when these register change , our customer will fail CEC ?

 

Best regards

Kawa

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