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MPC8377 link to samsung nand flash with CS[4], but flash ID been read is 0xFFFFFFFF

Question asked by jinfeng zhuang on Dec 28, 2015
Latest reply on Dec 29, 2015 by jinfeng zhuang

I have the evlution board to test my driver, it works ok, and read flash ID correctly. Now, i got another board, the nand flash has been linked to CS[4], not the origin CS[0], and all other signals are

same. I just want to read flash ID first, as it it simplest, we I scan all the banks while reading the flash ID, only the second one is not 0x0, it's 0xffffffff.

Does it means the access to nand flash is success? but why 0xffffffff ?