STC micro STC8A8K64D4 Series Reference Manual page 321

STC8A8K64D4 Series Manual
P1 = TH0;
}
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
AUXR = 0x80;
TMOD = 0x08;
TL0 = 0x00;
TH0 = 0x00;
while (INT0);
TR0 = 1;
IT0 = 1;
EX0 = 1;
EA = 1;
while (1);
}
Assembly code
;Operating frequency for test is 11.0592MHz
AUXR DATA
P0M1 DATA
P0M0 DATA
P1M1 DATA
P1M0 DATA
P2M1 DATA
P2M0 DATA
P3M1 DATA
P3M0 DATA
P4M1 DATA
P4M0 DATA
P5M1 DATA
P5M0 DATA
ORG
LJMP
ORG
LJMP
ORG
INT0ISR:
MOV
MOV
8EH
093H
094H
091H
092H
095H
096H
0B1H
0B2H
0B3H
0B4H
0C9H
0CAH
0000H
MAIN
0003H
INT0ISR
0100H
P0,TL0
P1,TH0
//TH0 is the high byte of the measured value
//1T mode
//Enable GATE, and enable timing when INT0 is 1
//Wait for INT0 to be low
//Start timer
//Enable INT0 falling edge interrupt
;TL0 is the low byte of the measured value
;TH0 is the high byte of the measured value
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