STC micro STC8A8K64D4 Series Reference Manual page 90

STC8A8K64D4 Series Manual
#define LVD2V4
#define LVD2V7
#define LVD3V0
sbit ELVD
#define LVDF
sbit P32
sfr P0M1
sfr P0M0
sfr P1M1
sfr P1M0
sfr P2M1
sfr P2M0
sfr P3M1
sfr P3M0
sfr P4M1
sfr P4M0
sfr P5M1
sfr P5M0
void Lvd_Isr() interrupt 6
{
PCON &= ~LVDF;
P32 = ~P32;
}
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;
PCON &= ~LVDF;
// RSTCFG = ENLVR | LVD3V0;
RSTCFG = LVD3V0;
ELVD = 1;
EA = 1;
while (1);
}
Assembly code
; Operating frequency for test is 11.0592MHz
RSTCFG DATA
ENLVR EQU
LVD2V0 EQU
LVD2V4 EQU
LVD2V7 EQU
LVD3V0 EQU
0x01
0x02
0x03
= IE^6;
0x20
= P3^2;
= 0x93;
= 0x94;
= 0x91;
= 0x92;
= 0x95;
= 0x96;
= 0xb1;
= 0xb2;
= 0xb3;
= 0xb4;
= 0xc9;
= 0xca;
0FFH
40H
00H
01H
02H
03H
//LVD@2.4V
//LVD@2.7V
//LVD@3.0V
//PCON.5
//Clear interrupt flag
//Test port
//Test port
//Low voltage reset when 3.0V is enabled, no LVD interrupt is generated
//Low voltage interrupt when 3.0V is enabled
//Enable LVD interrupt
;RSTCFG.6
;LVD@2.0V
;LVD@2.4V
;LVD@2.7V
;LVD@3.0V
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