STC micro STC8A8K64D4 Series - Timer 0 (External Count - T0 Is Extended for External Falling Edge Interrupt)

STC8A8K64D4 Series Manual
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ORG 000BH
LJMP TM0ISR
ORG 0100H
TM0ISR:
CPL P1.0 ;Test port
RETI
MAIN:
MOV SP, #5FH
MOV P0M0, #00H
MOV P0M1, #00H
MOV P1M0, #00H
MOV P1M1, #00H
MOV P2M0, #00H
MOV P2M1, #00H
MOV P3M0, #00H
MOV P3M1, #00H
MOV P4M0, #00H
MOV P4M1, #00H
MOV P5M0, #00H
MOV P5M1, #00H
MOV TMOD,#03H ;Mode 3
MOV TL0,#66H ;65536-11.0592M/12/1000
MOV TH0,#0FCH
SETB TR0 ;Start timer
SETB ET0 ;Enable timer interrupt
; SETB EA ; Not controlled by EA
JMP $
END
13.5.5 Timer 0 (External count - T0 is extended for external falling edge
interrupt)
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;