SEMJUL08 - LECT101 - 68K DIO TRAINER

SEMJUL08 - LECT101 - 68K DIO TRAINER - 2. RAM ADDRESS START...

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ECE 521/511: Digital System & Microprocessor
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UiTM MOTOROLA 68000 DIO TRAINER BOARD
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BOTTOM LAYER TOP LAYER INPUT/OUTPUT CONNECTOR
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EVEN ROM EVEN RAM ODD ROM ODD RAM Halt / Error LED 40 ways I/O Connector Voltage regulator +12V Dc Power Socket Power LED Crystal Oscillator 10MHz MOTOROLA 68000 MICROPROCESSOR RESET BUTTON
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68000 DIO TRAINER BOARD 40-PIN IDE CABLE INPUT/OUTPUT INTERFACE CIRCUIT
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HOW TO DESIGN INPUT/OUTPUT INTERFACE CIRCUIT A23 A22 A21 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 0 0 0 0 1 1 1 1 1 1 1 0 0 1 1 0 1 1 1 1 1 1 0 1 0 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 0 1 1 1 1 0 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 0 Y ADDRESS CONNECTION Y0 $000000 RESERVE FOR ROM Y1 $200000 RESERVE FOR RAM Y2 $400000 FREE Y3 $600000 FREE Y4 $800000 FREE Y5 $A00000 FREE Y6 $C00000 RESERVE FOR 68230 Y7 $E00000 FREE
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EXAMPLE – CONNECTION TO LATCH ORG $400 MOVE.B #$FD,$600000 END ORG $400 MOVE.B #%1111 1011,$600000 END LED2 LED1 All Vcc and Gnd should be connected to here Note : 1. ORG MUST START FROM ADDRESS $400
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Unformatted text preview: 2. RAM ADDRESS START FROM $200000 TURN ON LED1 TURN ON LED2 EXAMPLE CONNECTION TO BUFFER START MOVE.W $A00000,D0 AND.B #$01,D0 CMP.B #0,D0 BEQ SWITCH BRA START SWITCH DO SOMETHING .. .. .. BRA START END All Vcc and Gnd should be connected to here EXAMPLE CONNECTION TO MORE THAN 1 I/O INTERFACE ORG $400 BUFFER EQU $400000 LATCH EQU $800000 START MOVE.B BUFFER,D0 MOVE.B D0, LATCH BRA START END D0-D7 D0-D7 DTACK* DTACK* R/W* R/W* CLK RESET* RESET* MAD CS* A6-A23 A1-A5 RS1-RS5 PA0-PA7 PB0-PB7 PC0-PC7 M68k M68230 CLK (Register select pins) EXAMPLE CONNECTION TO PIT 68230 EXAMPLE CONNECTION TO PIT 68230 The End...
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SEMJUL08 - LECT101 - 68K DIO TRAINER - 2. RAM ADDRESS START...

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