Wouter van Ooijen wrote:
>
> > Try my Kit 128 designed by Tony Nixon. Powered by the USB port only.
> > All-flash PIC programmer. (Will not program non-flash chips.)
>
> Aha, another programmer that uses a diode-capacitor pump to generate
> Vpp!
>
> Two remarks about this programmer:
>
> I see no EEPROM, so am I right that it can not co-exist with any other
> non-eeprom FT232 USB gadget?
>
> From the circuit I think this programmer will not be able to do ICSP?
> The power for the target is provided via an I/O pin of the F628, and
> there is no way to force /MCLR low if the target circuit has a pull-up
> resistor.

Too true :-)

One interesting thing with the charge pump in this design is that it is
generated by hardware  alone, not software.

I just turn it on or off as required.

regards

Tony

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