8051 microcontroller (p89v51rd2)

[Kamlesh dabi]

Why we use pull up resister at the ports??
and can we use this resisters at all the ports??

Electronics lovers

 

[tpetar]

https://www.sparkfun.com/tutorials/218

https://en.wikipedia.org/wiki/Pull-up_resistor

 

[#MAAM#]

in 8051 pull up resistors placed at port0 only.

 

[Kamlesh dabi]

but in controller we have provided with some space near ports. why we have that space??

 

[#MAAM#]

your question not clear !!

 

[Kamlesh dabi]

I want to know that as we have pull on resisters on port 1, so can we use these resister on each ports of controller??

 

[#MAAM#]

I want to know that as we have pull on resisters on port 1, so can we use these resister on each ports of controller??

pull up resistors in port 0 only in other ports we not need this resistors.