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Descibe 8085 interfacing of stepper motor to rotate it through 90 degree using 8255?
Unipolar full step Stepper motor: _ _
INPUT SEQUENCE: X Y X Y
1 1 0 0
0 1 1 0
0 0 1 1
1 0 0 1
8255 CONTROL WORD: 1 0 0 0 0 0 0 0 =80H
PROGRAM:
MVI A, 80
OUT port B
START MVI A, FC
OUT port A
CALL DELAY
MVI A, F6
OUT port A
CALL DELAY
MVI A, F3
OUT port A
CALL DELAY
MVI A, F9
OUT port A
JMP START
DELAY LXI D, 0003
CALL DELAY
RET
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