Re: Not enough pins on EXPAND-B port for lab??

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: : : : We have only 42 pins available on the EXPAND-B port. : : : However in this lab, we need 23 address pins, 16 data : : : pins, and 8 signalling pins which amounts to 47 : : : signals (neglecting clock and reset). : : : Am I missing something here? : : There are actually 49 pins available. The pins marked DI1/99 : : and so on are dual-use pins. During configuration they are : : used to download the configuration bitstream, but after : : configuration of the FPGA they can be used as normal I/Os -- : : in the case above, I/O pin #99 for example. This is just : : enough pins to do the lab. : : Vaughn : Hmmm... : Lessee. : 42 - I/O pins : 4 - DI pins : 3 - Clear, CLK, OE pins : we need 47 pins IO, and Clock and reset. : Now, unless the OE pin is also able to be used as IO, this isnt possible. : Also, I tried assigning the DI pin as an output pin, and it complained. I guess it should be bi-directional type? : Jim

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