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AM3352: SYSBOOT[9] issue

Part Number: AM3352

Hi,

We are using a custom board, based on the AM335x Eval Board, and our NAND chip is from Micron (MT29F16G08ABACAWP-ITZ:C).

There are differences between versions of our board, but no any change between AM3352 and NAND chip since first version.

However, we found some version of our board need SYSBOOT[9] pull-up(high) and some need pull-down(low) for SYSBOOT[9].

According to the reference manual(SPRUH73P), initially high and low for SYSBOOT[9] indicates "ECC done by ROM or NAND".

Could we have more detail information about that?

We don't know why some board need SYSBOOT[9] pull-up and some are pull-down.

In wrong setting case, we can not boot up AM3352, and always see "CCC"...