gnupic: Good PIC-Programmer for Linux ?
Subject:
Re: Good PIC-Programmer for Linux ?
From:
Martin Peach ####@####.####
Date:
24 Jul 2002 21:30:03 -0000
Message-Id: <3D3F1938.2F212DCD@vax2.concordia.ca>
"Fernando M. Roxo da Motta" wrote:
>
> On Wed, Jul 24, 2002 at 05:33:19PM -0300, Fernando M. Roxo da Motta wrote:
> >
> > I'm just starting to play a bit with PIC's. I'm playing with 16F84 (ya!
> > I know it is outdated, someone gave me two and that is what I have by
> > now ;)) and using a serial device (sometime) named Com84 whose schematics
> > can be seem here :
> >
> > http://www.techfreakz.org/oldstuff/com84.gif
> >
>
> Just hooking to my own answer for a shortcut. ;))
>
> Is this kind of programmer compatible with some newer (than 16F84) PIC ?
>
It looks as though it would work with the 16F628 in high-voltage
programming mode, which is entered when MCLR goes high at least 5 usec
before Vdd, so the 100uF cap on the regulator may need to be increased
to give it more time to charge up before you start. Also you need to
start with the serial port powered down or else put a switch on the
output of the regulator (in which case you don't need to change the
100uF cap) to ensure this.
/\/\/\/*=Martin
