EasyPic7 running 3.3v PC does not recognize board with 26k20

[ACSJeff]

Hello,

I'm trying to program a 28 pin PIC18F26K20 on an EasyPic7

I've removed the 40 pin pic that came with the board and I see the jumper settings for 28 pin socket are the same for the 40 pin socket

The PIC18F26K20 is a 3.3 v device so I move the power supply jumper (J5) to 3.3v

When switching the EasyPic7 on, I get nothing but a dim lighting of the DATA LED on the MikroProg.

I switch to 5v, and the board comes alive - I hear the usb connection sound, but when I try to program I get a voltage error.

Should this board be able to program the PIC18F26K20 with 3.3v supplied to the board?


thanks

Jeff

[Aleksandar.Mitrovic]

Hi Jeff,

Yes this board support PIC18F26K20, and yes you will need to use 3.3V for this PIC.

Can you please send me the picture of your board in highest resolution as possible, with a settup for this MCU?

Did you try to program some other MCU on 3.3V?

Also which version of mikroProg Suite do you use?

Best regards,
Aleksandar

[ACSJeff]

Alex,

Thanks for the reply. I have switched back to the PIC16F1459 mcu for the time being. Everything works there FYI since its a new chip, there is a workaround for this chip:

The PIC16F1459 Came out after EasyPic7 was developed. Microchip changed the programming pins.

Move the 3 jumpers on J18 to the USB position.
Connect the newly-exposed top-left pin of J18 (the pin nearest the word 'I/O') to a spare RC0 header pin.
Connect the middle pin of J18 to a spare RC1 header pin.

The device is now correctly recognised as a 16F1459.

I do have an issue with the UART receive interrupt in another post regarding this chip. Everything has worked except for the UART Interrupt

thanks

Jeff

[Aleksandar.Mitrovic]

Hi,

Can you please tell me to which post do you refer?

Correct link would be desirable.

Best regards,
Aleksandar

[ACSJeff]

Ok, back to this issue I apologize.

Here is the board with a PIC25J50 28 Pin installed. Same issue as with the 26k20. The PC does not recognize the board at 3.3v, but does at 5V

Attached are pictures

Thanks

Jeff

[ACSJeff]

on more pic..

[Aleksandar.Mitrovic]

Hi,

Can you please tell me did you try to run PIC18F45K22 on 3.3V supply or any MCU on other sockets?
Do you have the same problem?

Your board can't be detected in Device manager?

Best regards,
Aleksandar

[ACSJeff]

PIC18F45K22 that came with board when inserted the board is recognized at 5volts

when I jumper to 3.3 volts, the board is not recognized.

So you are saying the PIC18F45K22 that came with the board should work at 3.3v?

thanks - sounds like the problem is 3.3 volts...

[ACSJeff]

Is the EasyPic7 supposed to be recognized at 3.3 Volts by the PC?

If so, my Easy Pic is not. I have hooked up the original 45K22 chip that came with the board and the PC will not recognize at 3.3 Volts

It does recognize at 5 Volts

[ACSJeff]

Ok I found an answer -

3.3V can only be programmed with LF MCUS...

https://www.mikroe.com/forum/viewtopic. ... 92&t=58301

Hi,

Unfortunately, only the LF MCUs can be programmed with mikroProg using the 3.3V voltage,
although the 18F4550 specification states that it can be programmed with this voltage.

I apologize for the inconvenience caused by this issue, I have reported this to our developers.

Regards,
Filip.


Oddly, when I turn the EasyPic7 on with an LF MCU installed (PIC16LF1459) the board is recognized by the PC. FYI the board was developed before this chip came out, so if anyone wants to program with this chip this is word around:

The PIC16F1459 Came out after EasyPic7 was developed. Microchip changed the programming pins.

Move the 3 jumpers on J18 to the USB position.
Connect the newly-exposed top-left pin of J18 (the pin nearest the word 'I/O') to a spare RC0 header pin.
Connect the middle pin of J18 to a spare RC1 header pin.

The device is now correctly recognised as a 16F1459.

[Aleksandar.Mitrovic]

Hi Jeff,

Thank you for this update.
And for sharing solution with other users.

Kind regards,
Aleksandar