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pirulito
Junior Member
Join Date: Apr 2004
Age: 43
Posts: 13
Member: 61858
Status: Offline
Thanks: 0
Thanked 0 Times in 0 Posts Protection against boxes badly manufactured
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Dear Sirs.I have a *****237;deia on as to protect the purchasers of these manufacturers of boxes that bring in its contents the calls hidden defects. Or either: The box already possesss a time of useful life that is known by who manufactures it as dongle is the case of universal box. Somebody will be able to make a page where it will be shown to all which the boxes are really trustworthy or not. Something as one lists black of these boxes. This would serve so that before buying the box you it is not been deceptive as it happens with universal box. This box was manufactured with a Pic that possesss a so delicate protection that when appearing any variation of chain it believes that is being violated and extinguished the recorded data. That is guilt of who manufactured it and damage for who bought it. As its manufacturer is gaining much money it nor if worries in coming here and offering the exchange for another one. Here it is the problem they read and they judge. PIC18LF6722 at 3.3V
I ran into a similar problem with a 18LF6621 at 3.3V. I could
program and reprogram the part just fine with an ICD-2 on USB.
Then I set code protection on a part. The erase command claimed
to work fine. Program command claimed to succeed but verify kept
failing. Erase at 3.3V wouldn't clear code protection.
I traced it ot the USB connection to ICD-2 won't supply necessary
>4.5V to PIC which is needed to bulk erase the code protect bits.
To fix it, I used jumpers from an external 3 x AA battery pack
via clip leads to the Vdd on the PIC part. A repeat of the bulk
erase command via ICD-2 cleared the code protect bits & board/PIC
went back into normal development (program/debug/reprogram/etc).
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