Use 74ls373 input (P2.7 chip select) and 74ls377 output (P2.6 chip select). Try to write a program to read ten data from 373 in sequence, invert them, and output them from 377.
Picture 1
Answer:
74LS373 (input): 7fffh
74LS373 (input): bfffh
MOV R7,#10
MOV R0,#30H
MOV DPTR,#7FFFH
LOOP0: MOVX A,@DPTR
CPL A
MOV @R0,A
INC R0
DJNZ R7,LOOP0
MOV R7,#10
MOV R0,#30H
MOV DPTR,#0BFFFH
LOOP1: MOV A,@R0
MOVX @DPTR,A
INC R0
DJNZ R7,LOOP1
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