16F883 & PICkit2

[5uco]

Hi Folks

Just had a (un)pleasant afternoon trying to program a 16F883. No device found ??

Well, I can see it. Checked the Pickit 2 voltages, clock, etc. OK.

I can program any other PIC. 16F887, 16F877, 16F873 etc. etc.

Tried another 2 new 16F883's .. just the same ...

Then I got this off the net:

Matrix Multimedia user forums • View topic - Using EB006 with 16F883

So, it seems the 12V is crook ..

Anyone got a simple work-around ??

The project I have could well use a 16F873, but that appears to have no int. clock. the 'F883 has.

Which is why I want to use it.

Dave D.

 

[3v0]

The link you provided talked about the voltage of VPP. You have yet to connect to the chip so that is not the problem.

In short there is a lot here we do not know.

What software are you using and have the PICs you can program been programmed in the exact same socket ?

 

[geko]

There is an issue with LVP mode on this part, covered in the errata document for the PIC16F883.

I believe it advises connecting the RB3/PGM Pin to ground.

 

[5uco]

Hi Folks

Thank you for the replies ..

PICkit V2.61
MPLAB V8.63

Same socket, same everything.

Tried to check comms from PK2 says 'no device'
If I try 'erase' several times in succession it occasionally recognises and erases the chip, but then if I try verify erase it promptly says 'no device' !!

Invariably recognises the presence of the PK2. Never had any problems at all with the circuit board & ZIF socket I use.

Works all the time except with these wretched 16F883's ....

Makes no difference if I have 5V on or off, or whether LVP or force HVP 'first program write'

Dave D.

 

[ccstc]

tie PGM pin to gnd will OK
the same trouble don't happen on 16f882 or 16f886

 

[Mosaic]

I've done 882s &886s ...no worries with those.

I did manage to make it not recognise the MCU once by fooling with PICkit 2 init settings. I had to DELETE the config file of the PICKIT2 to get the MCU to be recognised again.

 

[5uco]

Gave up eventually. My Pickit2 would instantly recognise any damn uC except those three '883's.

So, dumped them. Life's too short etc.

Re-jigged the project I was engaged on to take a 16F873. Turned out to be a good move as I had to use a 20MHz Xtal to get the speed I wanted.
So, I would have been stuffed anyway as the '883 would have used the Int. Clk. @ 8MHZ. Max.

So, thanks for the support ... I'll leave it with you ..

Dave D.