From: email@example.com (Roy McCammon)
Subject: Re: Querry, Kick Starting Crystal Oscilator.
Date: Fri, 08 Nov 2002 11:15:59 -0600
References: <3DCA905A.59FD928B@mmm.com.DELETETHIS> <3DCAE105.6CAAD7B9@mmm.com.DELETETHIS> <3DCBDC8E.2E54EBC@mmm.com.DELETETHIS>
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Jim Thompson wrote:
> On Fri, 08 Nov 2002 09:47:26 -0600,
> firstname.lastname@example.org (Roy McCammon),
> In Newsgroup: sci.electronics.design,
> Article: <3DCBDC8E.2E54EBC@mmm.com.DELETETHIS>,
> Entitled: "Re: Querry, Kick Starting Crystal Oscilator.",
> Wrote the following:
> |Jim Thompson wrote:
> |> |Just looking at the specs on the processor.
> |> |use this crystal in this circuit and wait this long).
> |> |
> |> Can you reference a processor data sheet?
> |Jim, I cannot reveal the processor, but it is nothing
> |special in this regard. You simply hang a 32KHz crystal
> |on it and it oscillates after a while. The reference
> |design holds the chip in reset for 2.1 seconds for
> |the purpose of letting that oscillator start. The
> |manufacturer isn't much help (they are digital guys).
> |All they say is they don't know how fast it starts
> |and that we better stick to the reference design.
> How long is it taking to reach equilibrium?
I cannot scope it out right now, and even if I
could, it almost certainly would not be a worst case.
Typically, I would expect it to be stable in a
few 100 ms or so.
Can we have a discussion about the technique
in general without referring to a specific part?
> ...Jim Thompson
> | James E.Thompson, P.E. | mens |
> | Analog Innovations, Inc. | et |
> | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
> | Phoenix, Arizona Voice:(480)460-2350 | |
> | Jim-T@analog_innovations.com Fax:(480)460-2142 | Brass Rat |
> | http://www.analog-innovations.com | 1962 |
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