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Questions about exteral pull up and strong internal pull-up of P0 in ADUC848

Question asked by Se-woong on Jul 6, 2015
Latest reply on Jul 6, 2015 by MMA

Hello,

 

My customer uses ADuC848 and they will use P0.3(pin 46) to output.

So external pull-up resistance is needed as ADuC848 Datasheet.

 

Q1) Would you let me know your recommended values of external pull-up resistance at P0.3?

       They use 3.3V and 5V. (They use 2 kinds of MCUs.)

 

And if they use Port 0 for accessing external data memory, Port 0 seems to use strong internal pull-ups.

Q2) In this case, would you let me know the value of strong internal pull-up?

 

 

Please refer attached ADuC848 Datasheet and let me know your advices.

 

 

Regards,

Se-woong

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