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imx25 booting from a NAND flash using internal boot(MT29F8G08ADBDAH4)

Question asked by Chandan Singh on Feb 22, 2013
Latest reply on Apr 2, 2013 by Jorge Ramirez
Branched to a new discussion

Hi All,


We have designed and built our custom board which has micron NAND flash(MT29F8G08ADBDAH4).

Able to download u.boot on the board in UART/USB dowload mode (bootmode=11) and checked back by enabling "Read Back check" flag.

but tried to boot from internal NAND boot(boot mode == 00) and it doesn't work.

Verified the BT_ pins used to configure all the boot parameters and they seems to be ok

After reset i can see "read enable(RE)" signal on the nand and i see some access on the nand bus for some time and it seems to be the first 4K read but nothing more.


If  i look at the signal on the Evalboard(iMX257-3pdk) i see a very long read access : of course the rom boot read the uboot total size image.

Now i have no idea what to look for.


Is there any way through which we can check that processor has gone in uart/usb boot again after encountering failure during processing of first 4kb NAND Flash?


How to read the errors logged by bootROM?


Thanks & Regards,