"Yaju Nagaonkar" <[email protected]> schrieb im Newsbeitrag
news:[email protected] oups.com...
> There was a 242 ohm resistor to limit the current into PROG_B since,
> the microcontroller is at 5V and PROG_B has to be at VCCAUX(2.5V).
>
> I tried to remove the resistor and connected the PROG_B to the
> microncontroller I/O. The FPGA still would not reset when the
> Microcontroller I/O was held low. The FPGA resets only when I connect a
> wire from the PROG_B pin to GND directly.
>

PROG_B is input only on FPGA with virtually no current, so if you nee strong
pulldown
to get it to low level there must be something else pulling it up, not FPGA

Antti