STC micro STC8A8K64D4 Series - LVD Interrupt

STC8A8K64D4 Series Manual
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JNB ACC.0,ISREXIT
ANL S4CON,#NOT 01H ;Clear interrupt flag
CPL P1.3 ;Test port
ISREXIT:
POP PSW
POP ACC
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 S4CON,#10H
MOV T2L,#0E8H ;65536-11059200/115200/4=0FFE8H
MOV T2H,#0FFH
MOV AUXR,#14H ;Start timer
MOV IE2,#ES4 ;Enable UART4 interrupt
SETB EA
MOV S4BUF,#5AH ;Send test data
JMP $
END
11.5.17 LVD Interrupt
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 LVD2V2 0x00 //LVD@2.2V
#define LVD2V4 0x01 //LVD@2.4V
#define LVD2V7 0x02 //LVD@2.7V
#define LVD3V0 0x03 //LVD@3.0V
sbit ELVD = IE^6;
#define LVDF 0x20 //PCON.5
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;