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Sector 7 CRC Check failure programming with EPM900

Mitchell Baldwin

We are developing a product based on the Philips 89LPC936 processor and using UV3/C51 with an EPM900 successfully for some time now. Our latest revision to the PCB, however, will not program; each time we get the following error:

"*** Error: Flash CRC Check Failed at sector 7."

All earlier PCB revisions program fine, and the strange thing is these _appear_ to program fine, too, until the last sector (Sector 7) of flash. We assume it is something with the latest PCB rev, but everything _looks_ OK. Does anybody have a suggestion as to where to look, or what else might be wrong?

Thanks,

Mitch

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  • 0 in reply to Keil Software Support Intl.

    Thank you for the responses. The issue related to a change to the EPM900 configuration, but I was confused by the observation that the earlier version boards programmed fine while the new ones did not. It turned out that another team member had set Sector 7 to not be erased prior to programming, so the older boards didn't complain (because they already had the verified code in Sector 7) while the new ones did not.

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  • 0 in reply to Keil Software Support Intl.

    Thank you for the responses. The issue related to a change to the EPM900 configuration, but I was confused by the observation that the earlier version boards programmed fine while the new ones did not. It turned out that another team member had set Sector 7 to not be erased prior to programming, so the older boards didn't complain (because they already had the verified code in Sector 7) while the new ones did not.

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