From a programing point of view they are easily overcome by pulling the I/O
pin to 0 volts - ie they are 'weak' at holding the pin value Hi.

bye.

> -----Original Message-----
> From: F. J. Andrew McDermott [SMTP:fud@UDEL.EDU]
> Sent: Friday, 15 December 2000 1:51
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [PIC]Weak pullups
>
> Being a research technician I understand and use pull up resistors.
> I am however confused by the 16F84 data sheet using the term "weak
> pullups" on the I/O port pins.  Can somebody explain to me please what
> qualifies a pullup circuit as "weak?"
>
> Thanks for your consideration,
> Andrew McDermott
>
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