Subversion Repositories z80soc

# Generated by www.ivysim.com  21 April 2008   4.37PM
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### SPARTAN-3E STARTER KIT BOARD CONSTRAINTS FILE
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# ==== Pushbuttons (BTN) ====
NET "KEY<0>" LOC = "H13" | IOSTANDARD = LVTTL | PULLDOWN ;
NET "KEY<1>" LOC = "V4" | IOSTANDARD = LVTTL | PULLDOWN ;
NET "KEY<2>" LOC = "K17" | IOSTANDARD = LVTTL | PULLDOWN ;
NET "KEY<3>" 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 ;

# ==== Clock inputs (CLK) ====
NET "CLOCK_50" LOC = "C9" | IOSTANDARD = LVCMOS33 ;
# Define clock period for 50 MHz oscillator (40%/60% duty-cycle)
NET "CLOCK_50" PERIOD = 20.0ns HIGH 40%;

# ==== Discrete LEDs (LED) ====
# These are shared connections with the FX2 connector
NET "LEDG<0>" LOC = "F12" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<1>" LOC = "E12" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<2>" LOC = "E11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<3>" LOC = "F11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<4>" LOC = "C11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<5>" LOC = "D11" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<6>" LOC = "E9" | IOSTANDARD = LVTTL | SLEW = SLOW | DRIVE = 8 ;
NET "LEDG<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_DAT" 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 "UART_RXD" LOC = "U8" | IOSTANDARD = LVTTL ;
NET "UART_TXD" LOC = "M13" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = SLOW ;

#NET "DRAM_CK_FB" LOC = "B9" | IOSTANDARD = LVCMOS33 ;
# Prohibit VREF pins
CONFIG PROHIBIT = D2;
CONFIG PROHIBIT = G4;
CONFIG PROHIBIT = J6;
CONFIG PROHIBIT = L5;
CONFIG PROHIBIT = R4;

# ==== VGA Port (VGA) ====
NET "VGA_B" LOC = "G15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
NET "VGA_G" LOC = "H15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
NET "VGA_HS" LOC = "F15" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
NET "VGA_R" LOC = "H14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;
NET "VGA_VS" LOC = "F14" | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;

# ==== Character LCD (LCD) ====
NET "SF_CE0"  LOC = "D16" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
NET "LCD_E"   LOC = "M18" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
NET "LCD_RS"  LOC = "L18" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
NET "LCD_RW"  LOC = "L17" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
# The LCD four-bit data interface is shared with the StrataFlash.
NET "SF_D<0>" LOC  = "R15" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
NET "SF_D<1>" LOC  = "R16" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
NET "SF_D<2>" LOC = "P17" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;
NET "SF_D<3>" LOC = "M15" | IOSTANDARD = LVCMOS33 | DRIVE = 4 | SLEW = SLOW ;