gnupic: Re: [gnupic] help - weird intermittent resets
Subject:
Re: [gnupic] help - weird intermittent resets
From:
Greg Hill ####@####.####
Date:
30 Jul 2005 05:28:24 +0100
Message-Id: <Pine.LNX.4.62.0507292222150.21540@hillnet.us>
On Fri, 29 Jul 2005, Jeff wrote:
> Sounds very much like a problem I had many years ago with a Z80 board
> running at a comparatively slow 4MHz. Ground and power traces were way
> too narrow, causing relatively high ground/Vcc resistance and lots of
> generated noise. Memory would get randomly corrupted, resulting in
> random resets.
I built a board with a 16F876 a year or two ago with exactly this problem.
I'd etched the board myself at home, and the ground traces in particular
ended up a little too narrow by the time everything else on the board
finished etching. I was able to confirm and correct the problem by
soldering a length of 30 ga wire wrap wire from the ground point of every
IC back to the ground connection for the board, in a star configuration
(rather than a bus configuration). Once I put those extra ground wires on,
everything worked reliably. Later I remade the board with wider traces,
and this one worked fine without need for extra ground wires.
Greg
