uinfc40.ucf

xilinx 开发板程序

NET CLK		LOC=P13; # CLOCK FROM EXTERNAL OSCILLATOR
#
# LED DRIVER OUTPUTS
NET LED<0>	LOC=P25;
NET LED<1>	LOC=P26;
NET LED<2>	LOC=P24;
NET LED<3>	LOC=P20;
NET LED<4>	LOC=P23;
NET LED<5>	LOC=P18;
NET LED<6>	LOC=P19;
//NET LED<7>	LOC=P30; # THERE IS NO CONNECTION TO THE DECIMAL-POINT
#
# DATA BITS FROM THE PC PARALLEL PORT
NET PC_D<0>	LOC=P44;
NET PC_D<1>	LOC=P45;
NET PC_D<2>	LOC=P46;
NET PC_D<3>	LOC=P47;
NET PC_D<4>	LOC=P48;
NET PC_D<5>	LOC=P49;
//NET PC_D<6>	LOC=P32; # MUST USE SPECIAL-PURPOSE PINS FOR
//NET PC_D<7>	LOC=P34; #   ACCESSING PC_D<6> AND PC_D<7>
#
# MICROCONTROLLER PINS
NET XTAL1	LOC=P37; # INPUT CLOCK
NET RST		LOC=P36; # ACTIVE-HIGH RESET 
NET ALE_	LOC=P29; # ACTIVE-LOW ADDRESS LATCH ENABLE 
NET PSEN_	LOC=P14; # ACTIVE-LOW PROGRAM-STORE ENABLE
NET RD_		LOC=P27; # ACTIVE-LOW READ
NET WR_		LOC=P62; # ACTIVE-LOW WRITE (ALSO CONTROLS RAM)
NET AD<0>	LOC=P41; # MULTIPLEXED ADDRESS/DATA BUS
NET AD<1>	LOC=P40;
NET AD<2>	LOC=P39;
NET AD<3>	LOC=P38;
NET AD<4>	LOC=P35;
NET AD<5>	LOC=P81;
NET AD<6>	LOC=P80;
NET AD<7>	LOC=P10;
NET A<0>	LOC=P3;  # DEMUXED LOWER BYTE OF ADDRESS
NET A<1>	LOC=P4;
NET A<2>	LOC=P5;
NET A<3>	LOC=P78;
NET A<4>	LOC=P79;
NET A<5>	LOC=P82;
NET A<6>	LOC=P83;
NET A<7>	LOC=P84;
NET A<8>	LOC=P59; # UPPER BYTE OF ADDRESS
NET A<9>	LOC=P57;
NET A<10>	LOC=P51;
NET A<11>	LOC=P56;
NET A<12>	LOC=P50;
NET A<13>	LOC=P58;
NET A<14>	LOC=P60;
NET A<15>	LOC=P28;
NET A16		LOC=P16; # MS address bit of the 128K RAM
#
# RAM CONTROL PINS
NET OE_		LOC=P61; # ACTIVE-LOW OUTPUT ENABLE
NET CE_		LOC=P65; # ACTIVE-LOW CHIP ENABLE