STC micro STC8A8K64D4 Series - Low Voltage Detection

STC8A8K64D4 Series Manual
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Assembly code
; Operating frequency for test is 11.0592MHz
IAP_CONTR DATA 0C7H
P0M1 DATA 093H
P0M0 DATA 094H
P1M1 DATA 091H
P1M0 DATA 092H
P2M1 DATA 095H
P2M0 DATA 096H
P3M1 DATA 0B1H
P3M0 DATA 0B2H
P4M1 DATA 0B3H
P4M0 DATA 0B4H
P5M1 DATA 0C9H
P5M0 DATA 0CAH
ORG 0000H
LJMP MAIN
ORG 0100H
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
SETB P3.2
SETB P3.3
LOOP:
JB P3.2,LOOP
JB P3.3,LOOP
MOV IAP_CONTR,#60H ;Reset to ISP when P3.2 and P3.3 are both 0
JMP $
END
6.7.5 Low Voltage Detection
C language code
// Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
sfr RSTCFG = 0xff;
#define ENLVR 0x40 //RSTCFG.6
#define LVD2V0 0x00 //LVD@2.0V