From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from real.realitydiluted.com ([208.242.241.164]) by pentafluge.infradead.org with esmtp (Exim 3.22 #1 (Red Hat Linux)) id 178KSU-0003QQ-00 for ; Thu, 16 May 2002 13:34:15 +0100 Message-ID: <3CE3A703.7090001@realitydiluted.com> Date: Thu, 16 May 2002 07:33:07 -0500 From: "Steven J. Hill" MIME-Version: 1.0 To: zeusj@firstlinux.net CC: Subhash Chandra , all in MTD mailinglist Subject: Re: NAND vs NOR Flashs? References: <20020515033651.763F636F9@sitemail.everyone.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-mtd-admin@lists.infradead.org Errors-To: linux-mtd-admin@lists.infradead.org List-Help: List-Post: List-Subscribe: , List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: Jim Zeus wrote: >>I would like to know the diff. between NAND and NOR flash types. >>Any pointers are appreciated. > > > The size of NAND flash (8-128M)is always bigger than NOR flash (1-16M); > Reading a NOR flash is a little faster than NAND flash; > Erasing and Writing a NAND flash is much faster than NOR flash; > So NAND flash is more fit for storing data and NOR flash is more fit for storing code. > And there is ECC (error correction) in NAND flash. > You can access NOR flash with SRAM interface and you have to do it with I/O port to NAND flash. > Those are some of the differences between NAND and NOR flash. > > That's some of it. Read the post I had from a while back: http://lists.infradead.org/pipermail/linux-mtd/2000-October/001270.html -Steve