STC micro STC8A8K64D4 Series - Page 110

STC8A8K64D4 Series Manual
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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
ELVD BIT IE.6
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
ORG 0000H
LJMP MAIN
ORG 0033H
LJMP LVDISR
ORG 0100H
LVDISR:
ANL PCON,#NOT LVDF ;Clear interrupt flag
CPL P1.0 ;Test port
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
ANL PCON,#NOT LVDF ;Interrupt flag needs to be cleared after power-on
MOV RSTCFG,# LVD3V0 ;Set the LVD voltage to 3.0V
SETB ELVD ;Enable LVD interrupt
SETB EA
MOV PCON,#02H ;MCU enters power-down mode
NOP ;Enter interrupt service routine immediately after wake-up from power mode
NOP
NOP