Microcontroller › 8051 › pull up resistor › that was really nice but now
October 22, 2011 at 7:10 am
#6737
dharmik
Participant
that was really nice but now question arises is that pull up resistor is required only if want to connect some load to port0 pin or its also essential if we want to send high and low logic simply …… for eg, if lcd pins RS, RW and E pin is connected to port0 then pull up is required or not ?????
and why pull up is not inbuilt in 8051family if its too essential ????????