To identify that which key is being pressed, we need to:
Posted: Thu Jul 14, 2022 8:40 am
a) ground all the pins of the port at a time
b) ground pins of the port one at a time
c) connect all the pins of the port to the main supply at a time
d) none of the mentioned
b) ground pins of the port one at a time
c) connect all the pins of the port to the main supply at a time
d) none of the mentioned