PICKIT4 story

[Henk57]

Some years ago I'd buy the PICKit4 it was by then a offer.

But due circumstances I left it alone.

Yesterday I pick it up, and install MPLAPX 5.30
Then PK4 was reconised, but refuse to connect, no further message seen, then that.
De-install 5.30 and go for 5.50.

Then message's pop up.
Driver issue, and more.
Found the solution in PK4 doc. 6.5 Hardware Tool Emergency Boot Firmware Recovery.

Thereafter I could connect to MPLAB IPE, it start with Flashing PK4.
The LED color in begin was, blue after plugging in USB, then Green.
After Emergency Flash, LED lit Yellow, thats allright.
So it was finally connected.

End of story? I'll think it was, Returned good, or bad, either way!

Next step, to find out is it up-to-date with most of PIC Family.

As test with MPLAB IPE I test of 45K22 will read or not, not, because I have to Enable VDD 5V.
Then the test.
Programming, Verify, and Erase, all went fine.
Programming in just a second, HEX file about 75% memory use

Then, see if I can get it to work, IPECMD in Proton eq. Positron Studio?

Further there is a MOD, between the two FET's, a resistor must be placed Drain and Source,
and cut the trace in between first.
It has something to do to eliminate spikes.
Anyone more info about that?

[tumbleweed]

Anyone more info about that?

You can get info on all the tech notes at https://developerhelp.microchip.com/xwiki/bin/view/software-tools/programmers-and-debuggers/etn/

For the PICkit4 you want to look at ETN-37B

Basically, when you use the PK4 with some (mostly older) parts that use a 12V VPP, the VPP signal is too fast and produces damaging overshoot on the MCLR pin, destroying the part. The modification is to slow down the rise time, which reduces this.

[Henk57]

Thank you.
image deleted.

I have taken a snapshot, but I can't post it, so I grap a picture from www.

Cut the trace between Q3 and Q4 and in between a resitor from Gate to Drain (not Drain & Source, as above).
Will do this next week.

[Henk57]

Second try.

On the Right 471 Resistor in tape, and at the Right-Bottem a (steel)tooth-picker to cut the trace.