# NOTE: Follow these instructions when you connect your own circuitry to the XS-40 board: # # 1. Do *NOT* connect your own power supply to any of the FPGA Vcc pins # 2. Connect your circuit's ground to one or more of the FPGA ground pins # 3. Do not exceed 5V on FPGA inputs (inputs expect 3.3V, but are 5-volt tolerant) # 4. Realize that the FPGA is a 3.3V device, so a HIGH level output is 3.3V # 5. You may use the FPGA Vcc pins (3.3V) to power your own circuit, provided your circuit does not # require a large amount of current. # # Ground pins: 12, 21, 31, 43, 52, 64, and 76 (must connect one or more of these to your circuit) # # Vcc pins: 2, 11, 22, 33, 42, 54, 63, and 74 (only connect to these pins if you are powering your # circuit from the XS-40 board and are not using another power supply!) # INPUTS: NET i$Clock LOC=P13; # Oscillator NET i$Reset LOC=P44; # Parallel Port From PC, Data 0 # OUTPUTS: NET o$Segments<5> LOC=P19; # LED a NET o$Segments<4> LOC=P23; # LED b NET o$Segments<3> LOC=P26; # LED c NET o$Segments<2> LOC=P25; # LED d NET o$Segments<1> LOC=P24; # LED e NET o$Segments<0> LOC=P18; # LED f