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STC89LE53RC 데이터시트(PDF) 94 Page - STCmicro Technology Co,.Ltd

부품명 STC89LE53RC
상세설명  Enhanced 80C51 Central Processing Unit ,6T or 12T per machine cycle
PDF  165 Pages
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제조업체  STC [STCmicro Technology Co,.Ltd]
홈페이지  http://www.stcmicro.com/
Logo STC - STCmicro Technology Co,.Ltd

STC89LE53RC 데이터시트(HTML) 94 Page - STCmicro Technology Co,.Ltd

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Example: write a program using Timer 0 to create a 5KHz square wave on P1.0.
Assembly Language Solution:
ORG
0030H
MOV
TMOD, #20H
;8-bit auto-reload mode
MOV
TL0,
#9CH
;initialize TL0
MOV
TH0,
#9CH
;-100 reload value in TH0
SETB
TR0
;Start Tmier 0
LOOP:
JNB
TF0,
LOOP
;Wait for overflow
CLR
TF0
;Clear Timer overflow flag
CPL
P1.0
;Toggle port bit
SJMP
LOOP
;Repeat
END
C Language Solution using Timer Interrupt :
#include <REG51.H>
/* SFR declarations */
sbit
portbit = P1^0;
/* Use variable portbit to refer to P1.0 */
main( )
{
TMOD = 0x02;
/* timer 0, mode 2 */
TH0 = 9CH;
/* 100us delay */
TR0 = 1;
/* Start timer */
IE = 0x82
/* Enable timer 0 interrupt */
while(1);
/* repeat forever */
}
void T0INT(void) interrupt 1
{
portbit = !portbit;
/*toggle port bit P1.0 */
}
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