UCF location constraints (Spartan-3AN Starter Kit board)
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Contents
- … (VGA, LCD, audio jack etc.)
Introduction
Quick cut-and-paste code snippets.
Reference documentation
Spartan-3A/3AN FPGA Starter Kit Board User Guide (ug334.pdf)
http://www.xilinx.com/support/documentation/boards_and_kits/ug334.pdf
Constraints Guide (cgd.pdf)
http://www.xilinx.com/itp/xilinx10/books/docs/cgd/cgd.pdf
Slide switches
NET "SW0" LOC = "V8" | IOSTANDARD = LVCMOS33 ; NET "SW1" LOC = "U10" | IOSTANDARD = LVCMOS33 ; NET "SW2" LOC = "U8" | IOSTANDARD = LVCMOS33 ; NET "SW3" LOC = "T9" | IOSTANDARD = LVCMOS33 ;
Push-button switches
Push-button switches
NET "EAST" LOC = "T16" | IOSTANDARD = LVCMOS33 | PULLDOWN ; NET "NORTH" LOC = "T14" | IOSTANDARD = LVCMOS33 | PULLDOWN ; NET "SOUTH" LOC = "T15" | IOSTANDARD = LVCMOS33 | PULLDOWN ; NET "WEST" LOC = "U15" | IOSTANDARD = LVCMOS33 | PULLDOWN ;
Rotary push-button switch
NET "A" LOC = "T13" | IOSTANDARD = LVCMOS33 | PULLUP ; NET "B" LOC = "R14" | IOSTANDARD = LVCMOS33 | PULLUP ; NET "CENTER" LOC = "R13" | IOSTANDARD = LVCMOS33 | PULLDOWN ;
Discrete LEDs
NET "LED0" LOC = "R20" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED1" LOC = "T19" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED2" LOC = "U20" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED3" LOC = "U19" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED4" LOC = "V19" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED5" LOC = "V20" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED6" LOC = "Y22" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "LED7" LOC = "W21" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
Clock sources
On-board 50 MHz crystal oscillator
NET "CLK" LOC = "E12" | IOSTANDARD = LVCMOS33 ;
Auxiliary clock oscillator socket (empty)
NET "CLK" LOC = "V12" | IOSTANDARD = LVCMOS33 ;
SMA connector
NET "CLK" LOC = "U12" | IOSTANDARD = LVCMOS33 ;
Six-pin accessory headers
Thru-hole pads (J19 header test points)
NET "PAD1" LOC = "Y18" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "PAD2" LOC = "W18" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "PAD3" LOC = "V17" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ; NET "PAD4" LOC = "W17" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;