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# Generated by www.ivysim.com 21 April 2008 4.37PM
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#####################################################
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### SPARTAN-3E STARTER KIT BOARD CONSTRAINTS FILE
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#####################################################
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# ==== Pushbuttons (BTN) ====
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NET "KEY<0>" LOC = "H13" | IOSTANDARD = LVTTL | PULLDOWN ;
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NET "KEY<1>" LOC = "V4" | IOSTANDARD = LVTTL | PULLDOWN ;
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NET "KEY<2>" LOC = "K17" | IOSTANDARD = LVTTL | PULLDOWN ;
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NET "KEY<3>" LOC = "D18" | IOSTANDARD = LVTTL | PULLDOWN ;
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# ==== Slide Switches (SW) ====
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NET "SW<0>" LOC = "L13" | IOSTANDARD = LVTTL | PULLUP ;
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NET "SW<1>" LOC = "L14" | IOSTANDARD = LVTTL | PULLUP ;
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NET "SW<2>" LOC = "H18" | IOSTANDARD = LVTTL | PULLUP ;
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NET "SW<3>" LOC = "N17" | IOSTANDARD = LVTTL | PULLUP ;
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# ==== Clock inputs (CLK) ====
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NET "CLOCK_50" LOC = "C9" | IOSTANDARD = LVCMOS33 ;
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# Define clock period for 50 MHz oscillator (40%/60% duty-cycle)
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NET "CLOCK_50" PERIOD = 20.0ns HIGH 40%;
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# ==== Discrete LEDs (LED) ====
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# These are shared connections with the FX2 connector
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NET "LEDG<0>" LOC = "F12" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<1>" LOC = "E12" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<2>" LOC = "E11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<3>" LOC = "F11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<4>" LOC = "C11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<5>" LOC = "D11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<6>" LOC = "E9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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NET "LEDG<7>" LOC = "F9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
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# ==== PS/2 Mouse/Keyboard Port (PS2) ====
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NET "PS2_CLK" LOC = "G14" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW ;
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NET "PS2_DAT" LOC = "G13" | IOSTANDARD = LVCMOS33 | DRIVE = 8 | SLEW = SLOW ;
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# ==== Rotary Pushbutton Switch (ROT) ====
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NET "ROT_A" LOC = "K18" | IOSTANDARD = LVTTL | PULLUP ;
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NET "ROT_B" LOC = "G18" | IOSTANDARD = LVTTL | PULLUP ;
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NET "ROT_CENTER" LOC = "V16" | IOSTANDARD = LVTTL | PULLDOWN ;
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# ==== RS-232 Serial Ports (RS232) ====
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NET "rs232_dce_rxd" LOC = "R7" | IOSTANDARD = LVTTL ;
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NET "rs232_dce_txd" LOC = "M14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = SLOW ;
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NET "UART_RXD" LOC = "U8" | IOSTANDARD = LVTTL ;
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NET "UART_TXD" LOC = "M13" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = SLOW ;
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#NET "DRAM_CK_FB" LOC = "B9" | IOSTANDARD = LVCMOS33 ;
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# Prohibit VREF pins
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CONFIG PROHIBIT = D2;
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CONFIG PROHIBIT = G4;
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CONFIG PROHIBIT = J6;
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CONFIG PROHIBIT = L5;
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CONFIG PROHIBIT = R4;
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# ==== VGA Port (VGA) ====
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NET "VGA_B" LOC = "G15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
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NET "VGA_G" LOC = "H15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
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NET "VGA_HS" LOC = "F15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
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NET "VGA_R" LOC = "H14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
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NET "VGA_VS" LOC = "F14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
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# ==== Character LCD (LCD) ====
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NET "SF_CE0" LOC = "D16" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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NET "LCD_E" LOC = "M18" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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NET "LCD_RS" LOC = "L18" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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NET "LCD_RW" LOC = "L17" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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# The LCD four-bit data interface is shared with the StrataFlash.
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NET "SF_D<0>" LOC = "R15" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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NET "SF_D<1>" LOC = "R16" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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NET "SF_D<2>" LOC = "P17" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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NET "SF_D<3>" LOC = "M15" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
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