Hi,
I wonder if anyone has seen something like this.
I have an FPGA design targeted at an Spartan xc3s1500 and using ISE8.2.
We are using a spartan evaluation board with some 7 segment LED's.
If I make minor changes to the pinout, sometimes the FPGA stops functioning completely. What is interesting, is that the 7 segment LED's are not driven. The VHDL code for this is :
p_seven_seg : process(clk system_reset_n,)
begin if(system_reset_n = '0')then seven_seg_1