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[on:]

Guys, I found this cheap Digital Volume chip: FM62429 - its great, but the datasheet tells me its a 2-wire interface: Data, Clock - but doesn't show me what is transmitted. Can someone give me a hint, please?   

http://www.fmsh.com/english/products/FM62429_ds_eng.pdf

Thank you, Wk

[Reply #1 on:]

first idea: from datasheet - Gain is from 0- -83dB in 1dB steps so I think one byte should be sufficient.

google gave me zillion links to the same datasheet or rubbish,
seems you have to reverse engineer the spec.  clock in bytes and measure ....

[Reply #2 on:]

Indeed. As soon as the chips arrive I will start playing around with it and see what happens, txs.

Wk

[Reply #3 on:]

Sadly no luck, couldn't get it to work. 

[Reply #4 on:]

A great friend just pointed me this out:

the FM62429 is a "copy" of Mistubishi's M62429/FP

And he sent me all PDF data, here's some links:

http://william-k.com/temp/M62429P.pdf





 

[Reply #5 on:]

Do you mind sharing the part of your code where you are communicating with the volume control circuit?

I am having trouble sending 11 bits. How do you do that?

[Reply #6 on:]

Additional from FM62429, CSC62429, CD62429 is replacement for M62429 as well.

if I were you , I will send 11 bits as 2 bytes since Arduino is 8 bits cpu. first byte is first 8 bits data, second byte will be rest 3 bits plus "00000" as tail by using Arduino virtual serial/serial port. I do not have above IC. You could give it a try.