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The purpose of the ring counter in the keyboard encoding circuit is: ( a ) to sequentially apply a HIGH to each row for detection
The purpose of the ring counter in the keyboard encoding circuit is:
a to sequentially apply a HIGH to each row for detection of key closure
b to provide trigger pulses for the key code register
c to sequentially apply a LOW to each row for detection of key closure
d to sequentially reverse bias the diodes in each row
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