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'Re[2]: Newbie Questions'
1995\10\29@095020 by BBoles

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    Yes, you could run a clock into the RC oscillator and it would allow
    you to wake up without the 1024 Tosc.  However, we don't recommend it
    because there is an internal pulldown transistor that you will have to
    override which will burn a lot of unnecessary current and my affect
    the long term reliability of the device.

    Rgds, Brian.                                  spam_OUTbbolesTakeThisOuTspammicrochip.com


______________________________ Reply Separator _________________________________
Subject: Re: Newbie Questions
Author:  John Payson <.....supercatKILLspamspam@spam@MCS.COM> at Internet_Exchange
Date:    10/27/95 4:19 PM


> At 11:32 PM 10/26/95 -0500, you wrote:
 [supercat]
> >Is it possible, when using an external oscillator, to have the chip wake
> >instantly from sleep mode (if the oscillator is running?)  Normally the
> >16c5x and 16cxx have an oscillator startup timer except in the RC mode.
> >Can the RC mode by made to accept an external oscillator signal (via some
> >suitable resistor or capacitive coupling perhaps?)
 [hobbes]
{Quote hidden}

Right, for powerup those timings apply.  For a reset from sleep, however,
only the 1024tosc [if XT, HS, or LP] is applied [nothing at all if RC].  My
question is whether it's possible to use the RC mode with an external osc-
illator so as to dispense with the extra 1024tosc.

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