Fuses issue on 16f884.... Locked out ??

[andybarrett1]

Hi Thank you for reply....

I can turn MCLR on see if makes a difference later .....
But does mean sacrificing an other chip... Got through 5 so far :-)

programmer is a PicKit 2 I think... Not in office at moment ... It is the default one in MPLAB ?

BR
Andy

[andybarrett1]

Hi Henrik

Programmer is a "Picstart Plus"...... But also does exactly same thing with a "Dataman 48-Pro"

Then turned the MCLR on in the config....programmed up my last 884.... changed some code..... programmed again and now working.

You are a star..... Thank you. Easy for me to change h/w to put a little RC on the reset

But why is this a problem ?????

Thank you again

Andy

[HenrikOlsson]

Wow, PICStartPlus, there's a blast from the past, haven't used mine for probably 10 years.

Did you read the other thread I linked to?
The problem occurs when you're using internal MCLR AND internal oscillator. But there's plenty to read on the subject so I won't go into details here.

If you can use external MCLR that's the easiest way to get around the problem, it's not recommended to use R/C network on the MCLR pin, a simple pullup is enough in 99% of the cases.

/Henrik.

[andybarrett1]

Well thank you Henrik

Yes I have just had a look see at the link .......Have saved it for reference .

Not sure if I can get my 6chips back though.....Be. Good as land fill !!

Thank you again

Andy

[Demon]

Andy, I keep all my old ICs and components in a jar. When I have enough, I put them in a plastic container (margarine or whatever from recycling bin), and throw in any scrap circuits then take everything to local recycling center. Whenever I get a new dude on the job, I just tell them to process these with televisions and computers.

They can get a surprising amount of gold and other metals back from these garbage parts now.

Robert

[andybarrett1]

I may just try that :-)

BR
Andy