From: S. Dikhoff <dikhoff@gmx.de>
Date: Sun, 03 Jul 2005 14:30:42 +0200
Subject: [U-Boot-Users] AT91RM9200EK erase ATMEL dataflash
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Hi,
I use u-boot-1.1.2 on an AT91RM9200EK board.
Does anybody knows how to erase the dataflash which is connected to the SPI?

I tried:

U-Boot1.1.2 > flinfo
DataFlash:AT45DB642
Nb pages:   8192
Page Size:   1056
Size= 8650752 bytes
Logical address: 0xC0000000
Area 0: C0000000 to C0007FFF
Area 1: C0008000 to C001FFFF
Area 2: C0020000 to C0027FFF
Area 3: C0028000 to C083FFFF


U-Boot1.1.2 > protect off c0000000 c001ffff
Un-Protect 2 DataFlash Sectors
U-Boot1.1.2 > erase c0000000 c001ffff
Error: start and/or end address not on sector boundary


The copy of images with "cp.b" to this flash seems to work properly, 
even without erasing the flash before.
Regards
Sascha