STC micro STC8A8K64D4 Series - INT2 Interrupt (Falling Edge Only)

STC8A8K64D4 Series Manual
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11.5.5 INT2 Interrupt (Falling Edge only)
C language code
//Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xc9;
sfr P5M0 = 0xca;
sfr INTCLKO = 0x8f;
#define EX2 0x10
#define EX3 0x20
#define EX4 0x40
sbit P10 = P1^0;
void INT2_Isr() interrupt 10
{
P10 = !P10; //Test port
}
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;
INTCLKO = EX2; //Enable INT2 interrupt
EA = 1;
while (1);
}
Assembly code
;Operating frequency for test is 11.0592MHz