[SOLVED] 8051 port 0 pullup resistors

[vreg]

Hi, I'm using Atmel's 8051 AT89C51RE2 for a microcontroller application

Do I need to provide pull up resistors if I'm using port 0, or is it only for specific type of applications?
Can I continue using port 0 like any other port after providing pullup resistors to each pin?

 

[shigha]

NYou have to give pull-up resistors whenever you are using port 0.
You can only use it after that. If no pull up resistors given, it wont work

 

[vreg]

NYou have to give pull-up resistors whenever you are using port 0.
You can only use it after that. If no pull up resistors given, it wont work

Can I use it like any other port after connecting resistors?

 

[jayanth.devarayanadurga]

Port 0 are open collector pins. So you should always use pull-up resistors on P0.

 

[nikhilsigma]

yes it will act like other ports after connecting pull up register....

 

[shigha]

Hope u got ur answer

 

[vreg]

Thank you for the clarification nikhilsigma, shigha, jayanth.devarayanadurga

 

[Narendra Krushnavanshi]

I am using port pins (2.0 to 2.7) as output lines . is it required to connect pull up resistors along these lines ?

 

[Venkadesh_M]

I am using port pins (2.0 to 2.7) as output lines . is it required to connect pull up resistors along these lines ?

Port 0 only open collector no need in other ports..