STC micro STC8A8K64D4 Series - Page 115

STC8A8K64D4 Series Manual
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delay();
PCON &= ~LVDF;
delay();
if (PCON & LVDF)
{
power >>= 1;
RSTCFG = LVD2V7;
delay();
PCON &= ~LVDF;
delay();
if (PCON & LVDF)
{
power >>= 1;
RSTCFG = LVD2V4;
delay();
PCON &= ~LVDF;
delay();
if (PCON & LVDF)
{
power >>= 1;
RSTCFG = LVD2V2;
delay();
PCON &= ~LVDF;
delay();
if (PCON & LVDF)
{
power >>= 1;
}
}
}
}
RSTCFG = LVD3V0;
P2 = ~power; // P2.3 ~ P2.0 are used to display battery level
}
}
Assembly code
; Operating frequency for test is 11.0592MHz
RSTCFG DATA 0FFH
LVD2V0 EQU 00H ;LVD@2.0V
LVD2V4 EQU 01H ;LVD@2.4V
LVD2V7 EQU 02H ;LVD@2.7V
LVD3V0 EQU 03H ;LVD@3.0V
LVDF EQU 20H ;PCON.5
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