STC micro STC8A8K64D4 Series Reference Manual page 268

STC8A8K64D4 Series Manual
sfr P3M0
sfr P4M1
sfr P4M0
sfr P5M1
sfr P5M0
sbit P10
void LVD_Isr() interrupt 6
{
PCON &= ~LVDF;
P10 = !P10;
}
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 = LVD3V0;
ELVD = 1;
EA = 1;
while (1);
}
Assembly code
;Operating frequency for test is 11.0592MHz
RSTCFG DATA
ENLVR EQU
LVD2V2 EQU
LVD2V4 EQU
LVD2V7 EQU
LVD3V0 EQU
ELVD BIT
LVDF EQU
P0M1 DATA
P0M0 DATA
P1M1 DATA
P1M0 DATA
P2M1 DATA
P2M0 DATA
P3M1 DATA
P3M0 DATA
P4M1 DATA
P4M0 DATA
P5M1 DATA
P5M0 DATA
= 0xb2;
= 0xb3;
= 0xb4;
= 0xc9;
= 0xca;
= P1^0;
0FFH
40H
00H
01H
02H
03H
IE.6
20H
093H
094H
091H
092H
095H
096H
0B1H
0B2H
0B3H
0B4H
0C9H
0CAH
//Clear interrupt flag
//Test port
//Interrupt flag needs to be cleared at power-on
//Set the LVD voltage to 3.0V
//Enable LVD interrupt
;RSTCFG.6
;LVD@2.2V
;LVD@2.4V
;LVD@2.7V
;LVD@3.0V
;PCON.5
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