From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Date: Mon, 17 Aug 2009 21:08:15 +0200 Subject: [U-Boot] OT-ish: NOR flash write speed degradation? In-Reply-To: References: Message-ID: <20090817190815.3490D833DBD2@gemini.denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Jake Peavy, In message you wrote: > > As I feel this list is a good resource for embedded design minds, please > forgive this elementary question. You are welcome. > As NOR flash ages, does write speed degrade? Or do writes take place at Yes, it does. Both erase and write times grow, sometimes significantly compared to "virgin" values when the flash was new. > roughly the same rate over time until the part reaches the write limit > (100k-1000k writes)? Any pointers in the right direction would be great. We've seen doubling of erase and write times much earlier, say after some 10...100 erase/write cycles. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de "This isn't brain surgery; it's just television." - David Letterman