STC micro STC8A8K64D4 Series - Timer 4 (External Count - T4 Is Extended for External Falling Edge Interrupt)

STC8A8K64D4 Series Manual
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13.5.28 Timer 4 (External count – T4 is extended for external falling edge
interrupt)
C language code
//Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
sfr T4T3M = 0xd1;
sfr T4L = 0xd3;
sfr T4H = 0xd2;
sfr T3L = 0xd5;
sfr T3H = 0xd4;
sfr T2L = 0xd7;
sfr T2H = 0xd6;
sfr AUXR = 0x8e;
sfr IE2 = 0xaf;
#define ET2 0x04
#define ET3 0x20
#define ET4 0x40
sfr AUXINTIF = 0xef;
#define T2IF 0x01
#define T3IF 0x02
#define T4IF 0x04
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;
sbit P10 = P1^0;
void TM4_Isr() interrupt 20
{
P10 = !P10; //Test port
}
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;