F876 programming questions
Mike Mansheim email (remove spam text)
>I activate VCC then a few 10's of millisecs later raise MCLR from ground
>to ~13V. That's all you need to do. The 72 osc clocks will relate to the
>reset feature in the chip. The OSC1 pin should be tied low (or high),
>and not left floating, before and during the programming process to stop
>any clock pulses incrementing the program counter.
Tony, thanks for the response.
When I do this "in-circuit", when I activate Vcc, MCLR will also rise to
Vcc. Then I am raising MCLR from Vcc instead of from ground. Also, since
the chip in installed on a target board, the OSC pins are hooked up, so I
would think the chip would actually "run" for the period of time between
activating Vcc and raising MCLR. This is the mode of operation I'm trying
to get a handle on.
Thanks again for the help.
http://www.piclist.com hint: The PICList is archived three different
ways. See http://www.piclist.com/#archives for details.
See also: www.piclist.com/techref/microchip/devprogs.htm?key=programming
You must be a member of the
piclist mailing list
(not only a www.piclist.com member) to post to the