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Altera_Forum
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13 years ago

Using EPCQ256 in x1 mode with remote update - Stratix IV E

I'm using the EPCQ256 config device for my Stratix IV E design. We were using the EPCS128, but it's not large enough. I have the SOIC16 device wired up in x1 mode. I'm able to use the Quartus p...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Quick update: I moved to Quartus 12.1 and regenerated the altasmi_parallel module (EPCQ256) and synthesized. The resulting sof file gave me access to the EPCQ256 PROM to read and write data and ID and status. One odd thing is that the device ID is returned as 0x10 rather than the expected 0x19.

If I use the EPCS128-version of altasmi_parallel the ID can be read back as 0x19, as expected. I have an open SR with Altera about this and they recognized similar results - reading the EPCQ256's ID with an EPCS128 version of altasmi returned 0x19, using the 'proper' altasmi module returned 0x10. They are looking into this internally, too.