You can achieve 128 or 256 with a single chip these days. Samsung makes them, as do others. You can also get stacked parts to double the capacity of a single footprint. Some Samsung (and maybe other vendors') parts support a boot mode where you can do a linear read off the first block. This allows you to put your bootstrap into the NAND with some restrictions to the type of code you want to execute. I don't know if the MTD can aggregate NAND parts into a single partition, but this can definitely be done inside YAFFS if required. Achieving this inside the MTD is probably more desirable to facilitate mounting (ie. otherwise you'd have to have YAFFS mount two devices). NB That the devices to support the features you want might not be available in 512-byte page sizes. YAFFS2 (in the pipe) will support different page sizes so this should not be an issue by the time you have a board. -- Charles -----Original Message----- From: Liam Breck [mailto:liam@pointservers.org] Sent: Wednesday, 15 January 2003 7:01 p.m. To: yaffs@toby-churchill.org Subject: 256 MBytes of NAND We need 128-256 MBytes of NAND flash for a custom SBC. We need to boot from this flash. Are any chips available at that size, or do we have to use 2-4 chips? If multiple chips, can YAFFS or MTD aggregate them into a single partition? What vendors would folks recommend? Thanks, Liam Breck, Director PointServers.org liam@pointservers.org Boston, Massachusetts http://pointservers.org/ ---------------------------------------------------------------------------- ----------- This mailing list is hosted by Toby Churchill open software (www.toby-churchill.org). If mailing list membership is no longer wanted you can remove yourself from the list by sending an email to yaffs-request@toby-churchill.org with the text "unsubscribe" (without the quotes) as the subject. --------------------------------------------------------------------------------------- This mailing list is hosted by Toby Churchill open software (www.toby-churchill.org). If mailing list membership is no longer wanted you can remove yourself from the list by sending an email to yaffs-request@toby-churchill.org with the text "unsubscribe" (without the quotes) as the subject.