On Tue, Oct 21, 2008 at 9:31 AM, Shawn Tan wrote: > 4) Configuration > Would you need your design to be configured via internal FLASH or external > PROM or is your design going to be manually downloaded via JTAG each time it > is powered up? The C3 does not have internal configuration memory. Alternative: use a MCU (higher end) with enough Flash to interface with the FPGA. the MCU can configure the FPGA. But I think a config PROM or Flash will be easier. > 5) USB > You will need to incorporate a USB slave core to your design (look it up on > opencores if you don't have one). This is a rather complex design and may > affect your final speed and choice of device. You will also need to write some > drivers to support your device. Alternative: use a USB MCU for this task: eg: Cypress EZ-USB FX2LP High Speed USB MCU or similar (NXP LPC-2888 family). I believe this is more typically used. Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist