M88PA parallel Programming

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#1
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the topic discussed on this thread deals wit ha specific problem of migration to the P version of Mega AVRs.https://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=86347&start=0&postdays=0&postorder=asc&highlight=&sid=a6921e3541563d4c41d512fd6af7d70f

I don't seem to be able to program my M88PAs more than once. I am using a 20MHz ceramic resonator - so the fuses are checked appropriately.
After the first program, I can rewrite the fuses, but they always return 0xFF, 0xFF and 0xFF. The Same applies to reading the signature.

Using HV Parallel programming on my SKT500 (inc BSEL2 to PC2 and PJUMP fitted) doesn't seem to restore the chips.

Any suggestions? What is wrong?

Matt

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Matt are you able to restore the internal 1MHz oscillator at all?

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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You guys must be in the same street ...

Ross McKenzie ValuSoft Melbourne Australia

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No. I can't restore any settings.
I have 3 chips in this state. I will try another when I get home.

Ross,
Jim could watch my boy play AFL, so yes we are pretty close.

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..all those noisy kids at the weekend...

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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Jim ? ... John .... now I am confused :lol:

Ross McKenzie ValuSoft Melbourne Australia

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..it all start with J...

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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A thousand Apologies John. I guess you now have to worry about cricket balls coming your way.

Anyways I solved my problem.
I couldn't get the "dud" AVRs to work on the SKT500 at all. Both ISP and PP/HVSP modes wouldn't work.
I had programmed then to work with an external Crystal.
Plugging them into an old SimmStik DT107 with a real crystal fixed the problem and hey presto that are as good as new. Now to work out why my M88 code won't work in the M88PA chips.

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Quote:

I couldn't get the "dud" AVRs to work on the SKT500 at all. Both ISP and PP/HVSP modes wouldn't work.
I had programmed then to work with an external Crystal.

Use the STK500 clock, and that will provide a clock source for you (after you set the jumpers to connect it).

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Strange, HVPP does not rely on the clock to be present, otherwise it would not be any different than ISP, just more cumbersome.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly