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Altera_Forum
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12 years ago

cyclone 3 and odd pin behavior

Using EP3C40F324I7N andEPCS16 in 'jic' setup. 'appears' only one pin, outputting a clock, D7, when programmed by the EPCS16, outputs a 'high' instead of a clock. (as apposed to low for un-assigned pi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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How are your MSEL pins strapped? Are they configured for AS (Active Serial) configuration? You won't get a clock out of the FPGA's DCLK pin (to drive the EPCS) unless they are configured correctly.

In that device pin D7 is a general purpose I/O pin. You're not expecting it to be DCLK, are you?

Regards,

Alex

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Left out, the rest of the chip appears to work. getting expected results from other outputs.