Xilinx Spartan-3E - Page 162

162 www.xilinx.com Spartan-3E Start Kit Board User Guide
UG230 (v1.0) March 9, 2006
Appendix B: Example User Constraints File (UCF)
R
NET "LED<6>" LOC = "E9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LED<7>" LOC = "F9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
# ==== PS/2 Mouse/Keyboard Port (PS2) ====
NET "PS2_CLK" LOC = "G14" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW ;
NET "PS2_DATA" LOC = "G13" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW ;
# ==== 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 ;
# ==== RS-232 Serial Ports (RS232) ====
NET "RS232_DCE_RXD" LOC = "R7" | IOSTANDARD = LVTTL ;
NET "RS232_DCE_TXD" LOC = "M14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = SLOW ;
NET "RS232_DTE_RXD" LOC = "U8" | IOSTANDARD = LVTTL ;
NET "RS232_DTE_TXD" LOC = "M13" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = SLOW ;
# ==== DDR SDRAM (SD) ==== (I/O Bank 3, VCCO=2.5V)
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 ;