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PORTB Pull-ups

 
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Haplo



Joined: 06 Sep 2003
Posts: 659
Location: Sydney, Australia

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PORTB Pull-ups
PostPosted: Sun Mar 07, 2004 5:53 am     Reply with quote
Hi
Is the weak pull-up on PORTB of PIC16F877 strong enough to drive the ouputs of a LM339 comparator? Thanks.
Neutone



Joined: 08 Sep 2003
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Location: Houston

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Re: PORTB Pull-ups
PostPosted: Sun Mar 07, 2004 11:17 am     Reply with quote
Haplo wrote:
Hi
Is the weak pull-up on PORTB of PIC16F877 strong enough to drive the ouputs of a LM339 comparator? Thanks.


If you only have the comparator wired to the portB pin it should be fine at low frequency.
Haplo



Joined: 06 Sep 2003
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PostPosted: Sun Mar 07, 2004 4:19 pm     Reply with quote
Thanks for your answer. I assume 1KHz-10KHz is low frequency, right?
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