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I see, iv attactched the schematic of the development board im using. but i would like to use a EP1C3T100C8N in my actual design not the EP2C5T144C8
So the JTAG and boot prom connections will be identical on the EP1C3T100C8N, its just a matter of using this chip and wiring it up the same as the EP2C5T144C8
Im a bit scared of forgetting to GND some special pin or having to have one held high
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The schematic looks fine.
If I don't have a processor implementing the programming interface, then I like to put LEDs on signals, eg. the STATUS# signal will go low when there is a problem, so you can put a red LED on that and the CONF_DONE signal goes high when the FPGA is configured, so you can either use a red LED to indicate not configured, or a green LED to indicate its configured (I generally use a TinyLogic to drive LEDs; sink or source depending on when you want the LED on).
Here's a reference schematic and some other docs:
http://www.ovro.caltech.edu/~dwh/carma_board/ http://www.ovro.caltech.edu/~dwh/carma_board/gda06rb004_carma_rev_a.pdf Cheers,
Dave
Honored Contributor
