U-Boot

Hi,

Does anybody tell me how can I delete completly an atmel dataflash with
U-Boot. I try this first: 1. I unprotect the areas of the dataflash. 2.
then i want to erase but i become follow messages: start and/or end adress
not on sector boundary. I look at the atmel site data*** of the
dataflash, but i can't find there anything else sector boundaries.
Thanks for your answers.






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