8051

8051 ,[object Object],[object Object],[object Object],[object Object],[object Object]

8051 software ,[object Object],[object Object],[object Object],[object Object],[object Object]

MCS-51 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The basic 8051 Core ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The 8751 in a 40-pin DIP To use internal EPROM /EA (pin 31) is connected to 5 volts. To use external program memory /EA is connected to ground.

Memory Organization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Program or Code Memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CM MOVC A,@A + DPTR ;A  CM(A+DPTR) MOVC A,@A + PC ;A  CM(A+PC) PC = PC(15..0) DPTR = DPTR(15..0)

External Memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],MOVX A,@DPTR ;A  XM(DPTR) MOVX A,@Rn ;A  XM(P2|Rn) MOVX @DPTR,A ;XM(DPTR)  A MOVX @Rn,A ;XM(P2|Rn)  A

Data Memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data memory XM DM MOV A,62H MOV R1,#62H MOV A@R1 MOV A,0A2H MOV R1,#0A2H MOV A@R1

Examples: ADD A,#7FH ;A  7FH ADD A,7FH ;A  DM(7FH)

8051

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8051