MCU-External expansion port

Publisher:心灵舞者Latest update time:2015-07-08 Source: 51heiKeywords:MCU Reading articles on mobile phones Scan QR code
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;===========================================================
Xport                Equ         06000H
XRead                Equ         0A000H
;===========================================================
                     org         0000H
                     Ajmp        main
;===========================================================                    
main:
main loop:
                     Mov Dptr,#Xport
                     MovX A,@Dptr                 
                     Mov         P0,A
                     Mov Dptr,#Xport+1
                     MovX @Dptr,A
                     Ajmp mainloop     
;===========================================================
                     End
 
 
Keywords:MCU Reference address:MCU-External expansion port

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