STC micro STC8A8K64D4 Series - Application of Watch-Dog Timer

STC8A8K64D4 Series Manual
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MOV P5M0, #00H
MOV P5M1, #00H
MOV P_SW2,#80H
; MOV A,#01H ;Main clock output to P5.4
; MOV A,#02H ;Divide the main clock by 2 and output to P5.4
MOV A,#04H ;Divide the main clock by 4 and output to P5.4
; MOV A,#84H ;Divide the main clock by 4 and output to P1.6
MOV DPTR,#MCLKOCR
MOVX @DPTR,A
MOV P_SW2,#00H
JMP $
END
6.7.3 Application of Watch-dog Timer
C language code
// Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
sfr WDT_CONTR = 0xc1;
sbit P32 = P3^2;
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;
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;
// WDT_CONTR = 0x23; //Watchdog enabled, overflow time is about 0.5s
WDT_CONTR = 0x24; //Watchdog enabled, overflow time is about 1s
// WDT_CONTR = 0x27; //Watchdog enabled, overflow time is about 8s
P32 = 0; //Test port