Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

How to read EPC4QC100N internal memory?

I am new for FPGA/CPLD. I am troubleshooting filed failure and suspect that EPC4QC100N internal memory has been corrupted. This system includes EPC4QC100N, EP20K100EBC356-3N and TMS320VC33PGE150...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

How are you or your manufacturer programming your EPC4? Whatever In-System Programmer (ISP) you or they are using should be able to read it's contents back. These devices also support JTAG which is very likely to be the method by which they're programmed. JTAG will allow you to read the contents of these devices.

We can't read the very, very! small image of the schematic you posted to understand your circuit more. Do post a larger one.

Your Xilinx USB CPLD programmer - is it a 'Platform Cable USB'? Yes, that supports JTAG. However, I suspect that's not the way to go. It'll need to operate with software that understands how to read the EPC4. The Xilinx software isn't likely to support the Altera device and Altera software isn't going to support the Xilinx programming cable. It is possible but it's very involved.

Cheers,

Alex