I think I paid less than $20 for my
PICKKIT3 (clone, I guess).
You may get away with programming it in-circuit (you'll have
to power the EC2 board) if the board has the 5 or 6 header
pins.
I put an PLCC68 socket on a piece of prototyping PCB with 6
pins for the PICKIT3 connector.
All ground and supply pins have to be connected.
Search for and download PIC18F6680ProgrammingSpecs.pdf
Finn
On 7/11/2021 10:15 PM, Bobby Hughes BHughes@qnsinc.net
wrote:
Finn / Tracy
We think Dennis H. has a corrupt A
controller chip. He inadvertently started the engine in Mode
4 and things went bad. The B controller is running normally
so we have a good chip to work with. This is one of the
early
big box EC2’s. Dennis and I worked a few hours trying
to tune the A controller. We reset Modes 1,3,4,6,8.multiple
times. Mode 2 is to copy A to B and I don’t think Mode 5
and 7 are used according to the book. There may be an issues
with the Programming Head. Sometimes we did managed to keep
the engine running with the manual mixture control. We
noticed changes to the engine while cycling through the
program modes. On one attempt we managed to get Mode 3
adjusted at 19” MP. We were then able to make adjustments in
Mode 1 up until about 24” MP and the engine just stopped. We
restarted the engine and we could not keep it running or
make any Mode 1 adjustment that helped. .
We pulled the EC2 and Program Head for
inspection. The Mode switch is a little sticky so we will
use mine to on the next attempt. So any advice were to get a
reasonable priced compatible 64-pin QFN programmer? Dennis’s
grandson will be the one copying the chip and said
Microchip’s programmer was about $400. We are looking for
chips and may have located some at Microchip direct.
PN: PIC 18F6680 –I/L
https://www.microchipdirect.com/product/PIC18LF6680-I/L?dfw_tracker=64197-PIC18LF6680-I%2FL&gclid=EAIaIQobChMIpe6Ny7fc8QIViwytBh0JDwLZEAQYASABEgJrufD_BwE
Thanks,
Bobby
J Hughes
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