Xilinx MIcroBlaze Development Spartan-3E 1600E Kit

MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide 161
UG257 (v1.1) December 5, 2007 www.xilinx.com
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Appendix B
Example User Constraints File (UCF)
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### SPARTAN-3E MicroBlaze Development KIT BOARD CONSTRAINTS FILE
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# ==== FPGA Configuration Mode, INIT_B Pins (FPGA) ====
NET "FPGA_M0" LOC = "M10" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "FPGA_M1" LOC = "V11" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "FPGA_M2" LOC = "T10" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "FPGA_INIT_B" LOC = "T3" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 4 ;
NET "FPGA_RDWR_B" LOC = "U10" | IO
STANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 4 ;
NET "FPGA_HSWAP" LOC = "B3" | IOSTANDARD = LVCMOS33 ;
#
# ==== Clock inputs (CLK) ====
NET "CLK_50MHZ" LOC = "C9" | IOSTANDARD = LVCMOS33 ; # GCLK10
# Define clock period for 50 MHz oscillator (40%/60% duty-cycle)
NET "CLK_50MHZ" PERIOD = 20.0ns HIGH 40%;
#
NET "CLK_AUX_66MHZ" LOC = "B8" | IOSTANDARD = LVCMOS33 ; # GCLK8 Populated with 66MHz Osc
# Define clock period for
66 MHz oscillator (50%/50% duty-cycle)
NET "CLK_AUX_66MHZ" PERIOD = 14.9ns HIGH 50%;
#
NET "CLK_SMA" LOC = "A10" | IOSTANDARD = LVCMOS33 ;
#
# ==== 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 ;
N
ET "RS232_DTE_TXD" LOC = "M13" | IOSTANDARD = LVTTL | 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 ;
#
# ==== 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 ;
NE
T "BTN_WEST" LOC = "D18" | IOSTANDARD = LVTTL | PULLDOWN ;
#
# ==== 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 ;
#
# ==== Discrete LEDs (LED) ====