I am new to Spartan 3E Starter Kit. I want to provide an external input to the FPGA. Which pins/port should I connect to? The input signal is a high frequency digital signal (5 MHz).
Note that the SMA (C9) is already being used and hence not available.
If it will be used as clock, use a GCLK pin. If the signal has a fast edge rate and you are concerned about signal integrity, consider using the high speed Hirose connecror.
The Hirose connector is J3. See page 115 of UG230. For details of the functions of each pin, including a list of GCLK pins, see table 15-2 on page 119.
