# ==== Clock inputs (CLK) ==== NET "CLK_50MHZ" LOC = "C9" | IOSTANDARD = LVCMOS33 ; # Define clock period for 50 MHz oscillator (40%/60% duty-cycle) NET "CLK_50MHZ" PERIOD = 20.0ns HIGH 40%; # ==== VGA Port (VGA) ==== #NET "VGA_BLUE" LOC = "G15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ; #NET "VGA_GREEN" LOC = "H15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ; #NET "VGA_HSYNC" LOC = "F15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ; #NET "VGA_RED" LOC = "H14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ; #NET "VGA_VSYNC" LOC = "F14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ; # ==== Rotary Pushbutton Switch (ROT) ==== #NET "ROT_A" LOC = "K18" | IOSTANDARD = LVTTL | PULLUP ; #NET "ROT_B" LOC = "G18" | IOSTANDARD = LVTTL | PULLUP ; #NET "ROT_CENTER" LOC = "V16" | IOSTANDARD = LVTTL | PULLDOWN ; # ==== Discrete LEDs (LED) ==== # These are shared connections with the FX2 connector NET "LED<7>" LOC = "F9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<6>" LOC = "E9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<5>" LOC = "D11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<4>" LOC = "C11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<3>" LOC = "F11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<2>" LOC = "E11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<1>" LOC = "E12" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; NET "LED<0>" LOC = "F12" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ; ## ==== Slide Switches (SW) ==== #NET "SW<0>" LOC = "L13" | IOSTANDARD = LVTTL | PULLUP ; #NET "SW<1>" LOC = "L14" | IOSTANDARD = LVTTL | PULLUP ; #NET "SW<2>" LOC = "H18" | IOSTANDARD = LVTTL | PULLUP ; #NET "SW<3>" LOC = "N17" | IOSTANDARD = LVTTL | PULLUP ; ## ==== Pushbuttons (BTN) ==== #NET "BTN_EAST" LOC = "H13" | IOSTANDARD = LVTTL | PULLDOWN ; #NET "BTN_NORTH" LOC = "V4" | IOSTANDARD = LVTTL | PULLDOWN ; #NET "BTN_SOUTH" LOC = "K17" | IOSTANDARD = LVTTL | PULLDOWN ; #NET "BTN_WEST" LOC = "D18" | IOSTANDARD = LVTTL | PULLDOWN ; # reset NET "RESET" LOC = "K17" | IOSTANDARD = LVTTL | PULLDOWN ; #uses BTN_SOUTH