Topic: i.MX21 NAND Flash controller errata??

Hi All,

   I am working with i.MX21 and was going through the schematic of Chumby. For the NAND flash interface, according to the i.MX21 errata, NFCE and NFRB need to be connected to the AND gate. But the schematic shows NFCE and NFRE connected to the AND gate.

  mancio pointed out the same in the thread at http://forum.chumby.com/viewtopic.php?id=178. But no one replied to it. Is this an error too? Or am I missing something?


Thanks,
Midhun.

Re: i.MX21 NAND Flash controller errata??

Yes the correct signals to AND are NFCE and NFRB. Those will generate the correct CE shape.
If you are usign an ST NAND (in TSSOP) you can avoid the workaround.

Re: i.MX21 NAND Flash controller errata??

Ah yes...in the katamari generation chumby, that mistake stood because it used an ST flash part, and we never put a Hynix or Samsung part there.

For the current shipping version (ironforge), you'll find that the bug is corrected. I believe update schematics are now available for that part which reflect the correction.

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