Hi all,
TechNet member's knowhow got no limits, so I try this, despite not usual PWB topic. Have some FPGAs for DSP that don't work at all. CLK A and B are  OK,  checked  with a scope on the inputs, all 5V Vcc's are OK, but when I apply stimuli on the various inputs, I get no reaction on any data outputs. Very primitive test method, I know, but I thought that at least something would come out to show that the device isn't completly dead. The flash memory is external, I've tried with both disabled and enabled flash, nothing helps. I can't remove the FPGAs, so I have to test them on the assembled board. I've tried various triggers too. An advanced troubleshooting would include logic analysers, external pattern generators and a special test adapter. That's for a logic specalist, which I'm not. My question is this: Does anyone of you have a proposal how to test, simple way, if the FPGAs are dead or alive? The FPGAs are Xilinx 4013, made in numbers of 'millions', very popular some years ago. A fresh board costs 30,000 USD, hoped to escape that cost.
Inge

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