i.MX Processors中的主题 Re: What does the MX27 Flash Controller use for a layout?

What does the MX27 Flash Controller use for a layout?

paulsorensen — Wed, 31 Oct 2018 15:32:27 GMT

I'm trying to interface with an MX27's nand flash chip using the same bus. But I'm not sure how the MX27's flash controller saves data on the NAND chips, it appears to be 512 bytes of data followed by 16 bytes of spare area. Is there an ecc/bad block marker/page number/block number? Anything like that would be helpful to interface with my board. Thank you!

Re: What does the MX27 Flash Controller use for a layout?

igorpadykov — Thu, 01 Nov 2018 04:07:54 GMT

Hi Paul

one can look at attached AN_MX_NAND_BAD_BLOCK.pdf

Best regards
igor
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Re: What does the MX27 Flash Controller use for a layout?

paulsorensen — Thu, 01 Nov 2018 17:55:26 GMT

Thank you, Igor,

Do you happen to know if there is information about any other properties of the spare area? Like block numbers or ECC byte locations or which ECC algorithm? I essentially need to create my own version of the flash controller in order to properly read.

Have a great day!

Re: What does the MX27 Flash Controller use for a layout?

igorpadykov — Fri, 02 Nov 2018 01:45:01 GMT

Hi Paul

one can look at sect.19.5.1 Main and Spare Area Buffers i.MX27 Reference Manual

https://www.nxp.com/docs/en/reference-manual/MCIMX27RM.pdf

Best regards
igor

Re: What does the MX27 Flash Controller use for a layout?

paulsorensen — Fri, 02 Nov 2018 15:11:25 GMT

This is it! Thank you so much!