Thanks, I must have moved a decimal point in my calc, (50k not 500k)

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Brian Clewer
Sent: 14 January 2004 11:58
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: PIC18F452 weak puulup resistor value?

Peter wrote:


> Does anyone know the value of the weak pull-ups that can be enabled
for
> PORTB on the PIC18F452, The data sheet only gives pullup current, from
> which I calculated the resistor to be in the region of 500k. Could
> anyone confirm this?


The data sheet states that the current is a minimum of 50uA and a
maximum of
450uA.  At 5v, this would give you a minimum of 11.11K and a maximum of
100K

Brian.

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