Use diode to supply Vcc to MCU, decoupled
    with a reasonably large reservoir capacitor
    that will keep the juice flowing to the MCU
    for 2 second.

    The diode is to prevent other part of the
    system draining from the cap.

    However, do take care of the reset requirement,
    especially in brownout situation. Your MCU
    might not be in reset, while other part of
    your system already reset.

Regards,
Peter Tiang.

----- Original Message -----
From: "Wing Kent Kwan" <gzkwan@PUBLIC.GUANGZHOU.GD.CN>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Saturday, April 14, 2001 1:36 PM
Subject: how use capacitor to keep Vcc to run 1-2 second


> how can I do when power supply shut down 1-2second,
> to keep the Vcc of MCU to Running 1-2second.
> (use capacitor)
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>
>
>

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