Pickit3 and PIC12F675

[bigmaurizio]

Hi all!

I can't program a PIC16F675 with my pickit3 clone. Someone has programmed a PIC16F675 using a pickit3?
I would understand if the problem is my programmer (it's a chinese clone)

[Parmin]

are you talking about PIC12F675?

Not sure I ever seen PIC16F675, not even listed on Microchip site 

[pickit2]

and I read it as PIC16F676

[Sideshow Bob]

If you use the PICKIT3 to power your board during programming. You must switch the power on in MPLAB. As default this option is set to off

[bigmaurizio]

  Yeah, 12F675 and 12F683, sorry for mistake!


Posted on: February 12, 2013, 09:46:00 09:46 - Automerged

Yeah, 12F675 and 12F683, sorry for mistake!

I don't use mplab but the stand alone programmer. Anyhow, using mplab the problem still the same.

[Sideshow Bob]

You say not work. That is very little to work. Can you tell why it is not working. What kind of errors do you get

[pickit2]

You say not work. That is very little to work. Can you tell why it is not working. What kind of errors do you get

second that, plus the code your trying to burn, may have errors.

I think there is a problem with internal osc/or/if you set one of the programming pins to output, I think the programmer needs to program the  pic12fxxx at 12V, can your clone do this voltage?

[bigmaurizio]

I'll try to explain step by step

1) the programmer is a Pickit3 clone from Sure Electronics

2) the software is PICkit 3 GUI and Scripting Tool v3.00 BETA from Microchip

3) the .hex file is generated from Mikrobasic

4) no programming problem using the picflash programmer integrated on my easypic5 board, and all work fine

Here the mikrobasic source code

*******

program wif675

' Declarations section
dim I as byte
dim VOLT as word

main:
'   Main program
CMCON = %00000111
ANSEL = %00000010
ADCON0 = %00100101
TRISIO.1 = 1
TRISIO.4 = 0
GPIO.4 = 1

while(1)

VOLT = Adc_read(1)

if VOLT > 128 then

GPIO.4 = not (GPIO.4)

for I=1 to 20

delay_ms(1000)

next I

end if

wend

end.

*******

fuses setting: wdt off, intosc, mclr off

I used this pickit3 clone programmer to program some PIC16F628, PIC16F887, PIC16F877A and PIC18F45K22 and all work fine.

But I can't program pic12f675 and pic12f683

[Sideshow Bob]

It is something on chip. Could you try to erase the chip. Then program it

[bigmaurizio]

After erase the osccal value is corrupted and the following message is showed "Invalid OSCCAL value detected". Anyhow the device is not really erased, but osccal yes 
After erase all still the same and I can't program the device. 

[Sideshow Bob]

Do you use the PICKIT to power your device during programming?

[bbarney]

Try this to get your oscal setting back

http://picprojects.org.uk/projects/recal/recal.htm

[Sideshow Bob]

Your Oscal value is not lost. Look at the picture in post #7

[bbarney]

That's a picture before you told him to erase the chip , post a new pic since you erased the chip

[titi]

Hi bigmaurizio,

To program pic12f675 and pic12f683, you need absolutely in "PICkit 3 Programmer" Software, in menu Tools, check "Use VPP First Program Entry".
If you don't check this option and uses MCLR as IO Pin you can program the PIC one time, the second time you have an error.
To have good programming for these PICs, PICKit 3 MUST supply VDD to target. (it is indicated by the software when you check "Use VPP First Program Entry" option).

If you have or can use a PICKIt 2 there is an option to retreive the lost OSCAL value by using menu Tools in "PICKit2 Programmer" Software (Tools, next OSCCAL, next Autoregenerate).
Unfortunately in "PICKit 3 Programmer" you have only Tools, next OSCCAL, Set Manually.

I hope this help you and other people that programs these small usefull PICs.

Best regards.

[bigmaurizio]

Now "Use Vpp first program entry" is checked but all still the same. It's very strange 
I also tried don't use INTOSC and set HS oscillator, but nothing to do.
I hope to find here someone has a genuine PICkit3, that can try to program these pics to know if work fine or not.   

[Parmin]

If the programming done by ICSP,
Is there loading on the PGD, PGC and VPP pins?

[thunderer]

Please try with MCLR ON (link it to Vdd with 10k) and program again. Let us know if it worked. Some Microchip chips do not like the MCLR OFF (the one I hate the most, and I have a bunch of them is the 16F630).

[Cain]

If the programming done by ICSP,
Is there loading on the PGD, PGC and VPP pins?

Some good advice all around and if there are load on PGD and PGC try using ~10k resistor in series.

[demure]

Hi everyone;
I bought clone pk3. It works. but  it didn't program 32mx795 series. Can everyone help me?
Thanks

[Sideshow Bob]

Hi everyone;
I bought clone pk3. It works. but  it didn't program 32mx795 series. Can everyone help me?
Thanks

Why did you hijack this old thread about a 12F PIC. It is bad forum etiquette to do this

[demure]

Ok. Sorry. But I thought it is same subject.
I will open a new subject.  Thanks.

[Parmin]

I dislike those who got in, ask questions repeatedly then silent..
No feedback...

Hey bigmaurizio  did the problem solved itself?
OR did you throw the whole rubbish into the dump?

[bigmaurizio]

Hi all! Sorry for delay. Finally I found the problem that was on the zif board. A bad metalization on the pcb.