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Appendix B: Example User Constraints File (UCF)
NET "LED<6>"
LOC = "E9"
NET "LED<7>"
LOC = "F9"
# ==== PS/2 Mouse/Keyboard Port (PS2) ====
NET "PS2_CLK"
LOC = "G14" | IOSTANDARD = LVCMOS33
NET "PS2_DATA" LOC = "G13" | IOSTANDARD = LVCMOS33
# ==== Rotary Pushbutton Switch (ROT) ====
NET "ROT_A"
LOC = "K18" | IOSTANDARD = LVTTL
NET "ROT_B"
LOC = "G18" | IOSTANDARD = LVTTL
NET "ROT_CENTER" LOC = "V16" | IOSTANDARD = LVTTL
# ==== RS-232 Serial Ports (RS232) ====
NET "RS232_DCE_RXD"
NET "RS232_DCE_TXD"
NET "RS232_DTE_RXD"
NET "RS232_DTE_TXD"
# ==== DDR SDRAM (SD) ====
NET "SD_A<0>"
LOC = "T1" | IOSTANDARD = SSTL2_I ;
NET "SD_A<1>"
LOC = "R3" | IOSTANDARD = SSTL2_I ;
NET "SD_A<2>"
LOC = "R2" | IOSTANDARD = SSTL2_I ;
NET "SD_A<3>"
LOC = "P1" | IOSTANDARD = SSTL2_I ;
NET "SD_A<4>"
LOC = "F4" | IOSTANDARD = SSTL2_I ;
NET "SD_A<5>"
LOC = "H4" | IOSTANDARD = SSTL2_I ;
NET "SD_A<6>"
LOC = "H3" | IOSTANDARD = SSTL2_I ;
NET "SD_A<7>"
LOC = "H1" | IOSTANDARD = SSTL2_I ;
NET "SD_A<8>"
LOC = "H2" | IOSTANDARD = SSTL2_I ;
NET "SD_A<9>"
LOC = "N4" | IOSTANDARD = SSTL2_I ;
NET "SD_A<10>"
LOC = "T2" | IOSTANDARD = SSTL2_I ;
NET "SD_A<11>"
LOC = "N5" | IOSTANDARD = SSTL2_I ;
NET "SD_A<12>"
LOC = "P2" | IOSTANDARD = SSTL2_I ;
NET "SD_BA<0>"
LOC = "K5" | IOSTANDARD = SSTL2_I ;
NET "SD_BA<1>"
LOC = "K6" | IOSTANDARD = SSTL2_I ;
NET "SD_CAS"
LOC = "C2" | IOSTANDARD = SSTL2_I ;
NET "SD_CK_N"
LOC = "J4" | IOSTANDARD = SSTL2_I ;
NET "SD_CK_P"
LOC = "J5" | IOSTANDARD = SSTL2_I ;
NET "SD_CKE"
LOC = "K3" | IOSTANDARD = SSTL2_I ;
NET "SD_CS"
LOC = "K4" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<0>"
LOC = "L2" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<1>"
LOC = "L1" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<2>"
LOC = "L3" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<3>"
LOC = "L4" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<4>"
LOC = "M3" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<5>"
LOC = "M4" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<6>"
LOC = "M5" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<7>"
LOC = "M6" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<8>"
LOC = "E2" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<9>"
LOC = "E1" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<10>" LOC = "F1" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<11>" LOC = "F2" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<12>" LOC = "G6" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<13>" LOC = "G5" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<14>" LOC = "H6" | IOSTANDARD = SSTL2_I ;
NET "SD_DQ<15>" LOC = "H5" | IOSTANDARD = SSTL2_I ;
162
| IOSTANDARD = LVTTL
| IOSTANDARD = LVTTL
LOC = "R7"
| IOSTANDARD = LVTTL ;
LOC = "M14" | IOSTANDARD = LVTTL
LOC = "U8"
| IOSTANDARD = LVTTL ;
LOC = "M13" | IOSTANDARD = LVTTL
(I/O Bank 3, VCCO=2.5V)
www.xilinx.com
| SLEW = SLOW
| DRIVE = 8 ;
| SLEW = SLOW
| DRIVE = 8 ;
| DRIVE = 8
| SLEW = SLOW ;
| DRIVE = 8
| SLEW = SLOW ;
| PULLUP ;
| PULLUP ;
| PULLDOWN ;
| DRIVE = 8
| SLEW = SLOW ;
| DRIVE = 8
| SLEW = SLOW ;
Spartan-3E Start Kit Board User Guide
UG230 (v1.0) March 9, 2006
R
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