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'Microchip should not cheat us'
2002\08\04@032156 by Anbunathan R

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Hi,
Whatever Microchip specification about ICSP is not correct. Especially i want to develop a programmer for Flash controllers like 16F84,16F628 and 16F873. I could succeed in reading, writing,erasing the flash memory and configuration memory. Whereas if i try to protect and unprotect the chip i could n't. I have followed the ICSP specification to do the above function which is given by Microchip. But my time and effort gone waste. Microchip should not do this. I feel Microchip is cheating the engineers by giving a wrong programming spec.

With Regards,
Anbu

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2002\08\04@035815 by Mike Singer

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Anbunathan R wrote:
> Hi,
> Whatever Microchip specification about ICSP is not correct.
> Especially i want to develop a programmer for Flash
> controllers like 16F84,16F628 and 16F873. I could succeed in
> reading, writing,erasing the flash memory and configuration
> memory. Whereas if i try to protect and unprotect the chip i
> could n't. I have followed the ICSP specification to do the
> above function which is given by Microchip. But my time and
> effort gone waste. Microchip should not do this. I feel
> Microchip is cheating the engineers by giving a wrong
> programming spec.

You should prove you really followed programming
ICSP specification before blaming Microchip for cheating.
A lot of folks here did it for years with standard programmers,
many with their own.

  Mike.

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2002\08\04@041057 by Joe Farr

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Why would Microchip 'cheat' their customers ?

There might be a mistake in their documentation and if so, it should be reported to them.
But they have nothing to gain by saying a product does one thing when it doesn't.

Most developers purchase a couple of samples, try a design and if all is well, their project goes into production. Microchip probably arn't really that interested in selling small quantities of chips. They want to sell thousands, and to do that, developers MUST be able to make them do what Microchip says.

If you really belive there is a problem, I would contact them before accusing them of cheating or perhaps ask this list if anyone has had similar problems as your having.

IMHO....



{Original Message removed}

2002\08\04@154725 by M. Adam Davis

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So you were never able to do a bulk erase?
The only thing that removes code protection is a bulk chip erase, IIRC.

-Adam

Anbunathan R wrote:

{Quote hidden}

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2002\08\05@005113 by Anbunathan R

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Adam,
Can you please give the command sequence to do chip erase

Anbu

-----Original Message-----
From:   M. Adam Davis Sent:   Monday, August 05, 2002 1:16 AM
To:     EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU
Subject:        Re: Microchip should not cheat us

So you were never able to do a bulk erase?
The only thing that removes code protection is a bulk chip erase, IIRC.

-Adam

Anbunathan R wrote:

{Quote hidden}

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