help needed for Cyclone: interfacing with CODEC chip W6810

[cdcll]

Dear all,

I would like to know if the ALTERA FPGA(Cyclone) can directly connect to CODEC chip W6810(from Winbond) or not? The VoH-min of W6810 = 4.6V. If not, how to design the interface?

Thanks a lot!

Best Regards,
cdcll

 

[drwho78]

Re: help needed for Cyclone: interfacing with CODEC chip W68

The IO of Cyclone is 3.3V tolerance and cannot handle voltage higher than that. I would suggest that you use buffers in between such as the 'LVC series that are 5V tolerance. The buffer 74LVC16244 would be such a choice.

 

[davorin]

Re: help needed for Cyclone: interfacing with CODEC chip W68

**broken link removed**

Or some simple LVTTL drivers/transceivers...

You could have looked at Alteras Cyclone schematics how they do it (o;

 

[davorin]

Re: help needed for Cyclone: interfacing with CODEC chip W68

checked their website...(pericom)...

You can order free samples (up to 10) from them (o;