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Hot!PICkit 3 VPP voltage level

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Ian.M
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Re: PICkit 3 VPP voltage level 2014/10/07 15:06:30 (permalink)
0 (1)
Or it was random corruption of the stored PICkit 3 state in the PC memory and rebooting the PC resolved the issue . . . .

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#21
Achuthan
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Re: PICkit 3 VPP voltage level 2019/02/06 11:50:20 (permalink)
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We tried prgramming a circuit that has 16F882 and few pheripherals using pickit 3 ( the current drwn by the hardware
is less thand 40 mA. we are getting the mesage " target ID does not match" These are the circuits which was working 
previously and one need to suspect some other hardware problem. The P!C kit worked for other devises and is working well. 
our doubts
1. is the The MCLR/Vpp votage shall be higher while programming 
2. what is the Vpp voltage level?
3. will it be applied by the PICKIT automaticaly while programming.
It will be nice if some one could help. pl send reply to achuthan@presevi.in 
#22
qhb
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Re: PICkit 3 VPP voltage level 2019/02/07 13:04:19 (permalink)
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Achuthan
1. is the The MCLR/Vpp votage shall be higher while programming

In HV mode, it pulses hgh briefly to enter programming mode.
You can see that on a scope, but not with a meter.
 

2. what is the Vpp voltage level?

About 13V
 

3. will it be applied by the PICKIT automaticaly while programming.

See above. Only briefly.
 

It will be nice if some one could help. pl send reply to achuthan@presevi.in

That's not how forums work. People don't email replies, everything stays in public so others can benefit from the answers.
 

Nearly there...
#23
ljcox
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Re: PICkit 3 VPP voltage level 2019/04/29 15:42:39 (permalink)
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I have the same problem.  I bought a PK3 some months ago & used it to programme a 16F1708 via MPLAB 8.2. 
(I have MPLABX but have not worked out how the use it fully).
But yesterday, I tried to use it again to do another 16F1708 and received the "Target device ID (0x0) does not match ......0" message. 
I connected my scope to the Vpp (without the PIC installed) and found it was only 4.4 Volt rather than the required 8 ~ 9 Volt.  I checked the hardware and it was OK.  
I also tried to programme a 12F675 but received the same message.
Any advice will be appreciated.
#24
qhb
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Re: PICkit 3 VPP voltage level 2019/04/29 15:57:33 (permalink)
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Did you try to run MPLABX with the PK3 connected?
That could have loaded it with firmware incompatible with MPLAB8.
Try unplugging the PK3 USB cable, hold down its button, then plug the cable back in, then release the button.
That will force it to reload all the firmware into the PK3 next time you use MPLAB8.
 

Nearly there...
#25
ljcox
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Re: PICkit 3 VPP voltage level 2019/04/29 16:43:59 (permalink)
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Thanks for the reply. I have never used MPLAB X with the PK3.  I could not work out how to use it fully so, rather than waste time working it out, I returned to MPLAB 8.2 which does all I need.
I tried your solution but it did not work. 
I tried it first with MPLAB 8.2 open.  Then I tried again by closing MPLAB, doing the button trick & then I opened MPLAB.  Neither worked.  Am I missing something?
Edit.  After doing what you suggested, the situation has become worse.   I tried to look at the waveforms with my scope & there was nothing on Vpp, PGD or PGD.
post edited by ljcox - 2019/04/30 02:07:39
#26
qhb
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Re: PICkit 3 VPP voltage level 2019/04/29 16:51:38 (permalink)
+1 (1)
What is supplying VDD when you program?
i.e. is it external, or have you set the programmer to supply power?
Could you post the entire output log from when you attempt to program?
 
post edited by qhb - 2019/04/29 19:02:56

Nearly there...
#27
Jerry Messina
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Re: PICkit 3 VPP voltage level 2019/04/30 02:38:36 (permalink)
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It's probably just my fumbling fingers, but sometimes I have problems using the button.
To manually force MPLAB to update the tool:
 
Disconnect the tool from the target.
Navigate to the 'Debugger | Settings... | Configuration' tab.
In the Download Firmware section uncheck 'Auto Download Latest Firmware' and click 'Manual Download'.
That should open a file browser window pointing to the PICkit3 folder.
Select the .jam file (PK3FW_012890.jam) and click 'Open'

You should see the Output window progress as it goes through the following steps...

Downloading Firmware...
Downloading bootloader...
Bootloader download complete
Running self test...
Self test completed
Downloading RS...
RS download complete
Downloading AP...
AP download complete

Connecting to PICkit 3...
Running self test...
Self test completed
Firmware Suite Version...... 01.28.90
Firmware type......................PIC18F
PICkit 3 Connected.




post edited by Jerry Messina - 2019/04/30 02:51:01
#28
nigelwright7557
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Re: PICkit 3 VPP voltage level 2019/04/30 14:05:38 (permalink)
+1 (1)
It could be a bad PIC in the circuit that breaks the PICKIT 3.
If its /MCLR has gone short it could be upsetting the PICKIT 3.
 
I have problems with pickit 3 at the best of times.
It plays up most when swapping the PIC variant I am trying to program.
I sometimes get VDD out of range.
Sometimes PIC ID is said to be wrong.
Once it gets the same PIC to program it is fine after that.
Sometimes swapping from MPLAB to MPLAB x sorts it out.
 
I tried a PICKIT 4 but broke it pretty quickly so went back to pickit3.
 
#29
NKurzman
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Re: PICkit 3 VPP voltage level 2019/04/30 14:55:45 (permalink)
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I tried a PICKIT 4 but broke it pretty quickly so went back to pickit3.
 
https://www.microchip.com/cisar/Home.aspx
#30
ljcox
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Re: PICkit 3 VPP voltage level 2019/04/30 17:10:31 (permalink)
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Thanks for the reply. I supply the 5 Volt from one of the PC's USB ports.
I don't have an output log at this point, I'll post it next time I attempt to programme.
#31
ljcox
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Re: PICkit 3 VPP voltage level 2019/04/30 17:39:25 (permalink)
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Thanks for the reply.  I'll test the PIC to see if there are any shorts.  I assume that PK3 has protection (e.g. series resistors & over voltage protection diodes) against external shorts.  However, I also tried to programme a 12F675 via PK3 but that did not work either - same error message.  I supply Vdd from one of the PC's USB ports.
Yesterday, I took advice from someone on another forum  He gave me a procedure that involves pressing the button on PK3 & claimed that would reload the firmware in the PK3.  I did that, but now I don't see any pulses on the Vpp. PGD & PGC lines even without a PIC connected.  The PK3 manual indicated that the button is for "future use".  I have MPLAB X but could not work out how to use it properly. I did not want to waste time climbing the learning curve, so I returned to the MPLAB 8.92.
Several months ago, I was able to programme a 16F1708 via 8.92 & PK3 but not now.  Talk about frustration!
 
#32
qhb
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Re: PICkit 3 VPP voltage level 2019/04/30 17:58:45 (permalink)
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ljcox
...
Yesterday, I took advice from someone on another forum  He gave me a procedure that involves pressing the button on PK3 & claimed that would reload the firmware in the PK3.

I gave you that advice in post#25 here.
Jerry gave an alternative technique in post#28.
What messages do you see when you try his technique?
 

Nearly there...
#33
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