GMS81C2012 datasheet(30/107 Pages) HYNIX

30 / 107 page

GMS81C2012/GMS81C2020

HYUNDAI MicroElectronics

MAR. 2000 Ver 1.00

Example: The usage software example of Vector address for GMS81C2020.

ORG

0FFE0H

NOT_USED

SIO

; Serial Interface

BIT_TIMER

; Basic Interval Timer

WD_TIMER

; Watchdog Timer

ADC

; ADC

NOT_USED

TIMER1

; Timer-1

TIMER0

; Timer-0

INT1

; Int.1

INT0

; Int.0

NOT_USED

; -

RESET

; Reset

ORG

0B000H

; GMS81C2020(20K)ROM Start address

;

ORG

0D000H

; GMS81C2012(12K)ROM Start address

;*******************************************

;

MAIN

PROGRAM

;*******************************************

;

RESET:

;Disable All Interrupts

CLRG

LDX

RAM_CLR: LDA

;RAM Clear(!0000H->!00BFH)

STA

{X}+

CMPX

#0C0H

BNE

RAM_CLR

;

LDX

#0FFH

;Stack Pointer Initialize

TXSP

;

LDM

R0, #0

;Normal Port 0

LDM

R0IO,#82H

;Normal Port Direction

LDM

TDR0,#125

;8us x 125 = 1mS

LDM

TM0,#0FH

;Start Timer0, 8us at 4MHz

LDM

IRQH,#0

LDM

IRQL,#0

LDM

IENH,#0E0H

;Enable Timer0, INT0, INT1

LDM

IENL,#0

LDM

IEDS,#05H

;Select falling edge detect on INT pin

LDM

R0FUNC,#03H ;Set external interrupt pin(INT0, INT1)

;Enable master interrupt

NOT_USED:NOP

RETI

GMS81C2012 Datasheet(PDF) 30 Page - Hynix Semiconductor

GMS81C2012 Datasheet(HTML) 30 Page - Hynix Semiconductor

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