Re: Power-On Reset

From: Guy Macon (http://www.guymacon.com/)
Date: 02/22/05 

Date: Tue, 22 Feb 2005 23:03:31 +0000

(Why did you crosspostthis to sci.electronics.cad? There is a
reason why different newsgroups have different names; it is so
that someone interested in electronics CAD does not have to wade
through off-topic posts about electronics design.)

Allan Herriman wrote:
>
>Rich Grise <richgrise@example.net> wrote:
>
>>What's wrong with a 1 uF cap from the POR pin to ground, with,
>>say, a 10K pullup?
>
>Rich, I am unable to tell whether you were being sarcastic, or whether
>you really don't know why an RC circuit is a bad reset generator (in
>general).

I believe that you are incorrect. An RC circuit is a bad reset
generator in particular applications, not in general. It depends
on the device. Many devices do just fine with an RC. Others do
well with a resistor/capacitor/diode circuit. A few reset just
fine with no external components. Others really need a dedicated IC.

In general, the reset circuit recommended in the data*** is a
good reset circuit. There are exceptions, but that's the general
rule. 

-- 
Guy Macon <http://www.guymacon.com/>
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