STC micro STC8A8K64D4 Series - Page 90

STC8A8K64D4 Series Manual
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#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
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 Lvd_Isr() interrupt 6
{
PCON &= ~LVDF; //Clear interrupt flag
P32 = ~P32; //Test port
}
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; //Test port
// RSTCFG = ENLVR | LVD3V0; //Low voltage reset when 3.0V is enabled, no LVD interrupt is generated
RSTCFG = LVD3V0; //Low voltage interrupt when 3.0V is enabled
ELVD = 1; //Enable LVD interrupt
EA = 1;
while (1);
}
Assembly code
; Operating frequency for test is 11.0592MHz
RSTCFG DATA 0FFH
ENLVR EQU 40H ;RSTCFG.6
LVD2V0 EQU 00H ;LVD@2.0V
LVD2V4 EQU 01H ;LVD@2.4V
LVD2V7 EQU 02H ;LVD@2.7V
LVD3V0 EQU 03H ;LVD@3.0V