i.MX7D NAND 4-bit vs 1-bit ECC

[demoniacmilk]

Hello!

I am about to select a NAND flash for a hardware design based on the i.MX7D.

What is throwing me off is the Flashs "ECC requirement" of either 1 or 4 bits.

Integrated Silicon Solution Inc. SRAM, DRAM, FLASH, ANALOG, KGD, WAFER 

From what I read in the MX7 datasheet, BCH performs ECC calculations for NAND operations and supports 2...62 bit ECC. Does this limit my NAND selection to 4-bit ECC versions?

If the selection is not limited, would you recommend 1- or 4-bit ECC? Never worked with NAND before so I am wondering if there are any (dis)advantages to either solution.

[igorpadykov · Accepted solution]

Hi Lars

selection is not limited as with 2bit ecc settings bch will also work fine with 1bit ecc nands.

There are no preferences using 1- or 4-bit ecc nands.

Best regards
igor
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