On 01/30 2010 at 13:12:49 napsal flameman mayer wrote: > > You cannot brick Spitz and Akita. PROM boot should always work. > > yeah, what the PXA270 first fetch is on prom, and prom is ReeadOnly > ... so i mean if you erase/damage the "flash" (which should be "Write > Protected" by CPLD) contents
There is no protected area of NAND. You can write anywhere. > what happens, so ? supposing you have erased (stuffing 0x00) the > whole > flash, could you repair your akita in order to reprogram the flash > and > make it still booting into something useful ? NAND Flash Restore from the ROM diag menu shoud help. Stuffing 0x00 in the whole flash is even part of this menu. > (i was supposing you can repair with a jtag) I guess that pre-production series have had JTAG + NOR flash, production series have serial + PROM. > only jtag should have sense: (speculative ideas) sharp could have put > the prom on akita with a soldered empty flash, than assembled the > whole, and finally plugged a jtag on the back to program the flash > > isn't reasonable ? I guess that they used ROM diag or ROM debugger to flash NAND. > (this schema is exactly what has been done on my ppc board: flash has > been programmed by jtage after it was soldered on board) Yes, it is a pretty common with OneNAND chips. However even there JTAG is impractically slow to flash the whole flash contents. I am not an electronics expert, but I would expect risk of memory "forgetting" during the soldering process. -- Stanislav Brabec http://www.penguin.cz/~utx/zaurus _______________________________________________ Zaurus-devel mailing list Zaurus-devel@lists.linuxtogo.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/zaurus-devel
