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From: LC on 12 Nov 2009 07:48
Hi,

On a board here I always load an EPCS16 without errors,
and the FPGA (cyclone III) works as expected.

But Quartus II it does not verify the EPCS16 it reports
operation failed. However yesterday I had it verifying
ok for more than 2 hours and today if fails again to verify.

All other operations seem to work fine, erasing, examining,
blank check etc.

Is it a defective chip or anyone else has seen this behavior ?

Luis C.

p.s. Quartus II 8.1 / AS w/USB Blaster.
From: Adam Górski on 12 Nov 2009 10:17
LC pisze:
> Hi,
>
> On a board here I always load an EPCS16 without errors,
> and the FPGA (cyclone III) works as expected.
>
> But Quartus II it does not verify the EPCS16 it reports
> operation failed. However yesterday I had it verifying
> ok for more than 2 hours and today if fails again to verify.
>
> All other operations seem to work fine, erasing, examining,
> blank check etc.
>
> Is it a defective chip or anyone else has seen this behavior ?
>
> Luis C.
>
> p.s. Quartus II 8.1 / AS w/USB Blaster.

Try with Jtag and indirect EPCS programming mode.

Adam
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