Hi Anyone had any experience with Simtek non-volatile RAM - the sort that writes all its data to (EEPROM?) in one hit when the supply falls below a trigger level (type STK14CA8)? Cheers Geoff
Simtek NVRAM
Started by ●December 22, 2004
Reply by ●December 22, 20042004-12-22
On Wed, 22 Dec 2004 13:02:09 +0100, "Geoffrey Mortimer" <me@privacy.net> wrote in comp.arch.embedded:> Hi > > Anyone had any experience with Simtek non-volatile RAM - the sort that > writes all its data to (EEPROM?) in one hit when the supply falls below a > trigger level (type STK14CA8)? > > Cheers > GeoffWe've been using Simtek parts for about five years now, and they work quite well. You just have to make sure that you follow the data sheet recommendations for Vcap and the pull up on the write line. In addition, you might have to make sure your program does not try to access the contents of the RAM during store and recall cycles. Did you have any more specific questions? -- Jack Klein Home: http://JK-Technology.Com FAQs for comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html comp.lang.c++ http://www.parashift.com/c++-faq-lite/ alt.comp.lang.learn.c-c++ http://www.contrib.andrew.cmu.edu/~ajo/docs/FAQ-acllc.html
Reply by ●December 22, 20042004-12-22
hi Geoff, Not that particular device, but have used the STK22C48 for a number of years now without a problem. They are good devices, a little expensive though. Have you considered using FRAM from Ramtron. All the same benefits plus more. No need to hold the supply up long enough to allow a write to EEPROM. Can have a RTC as well. Wonderful devices. www.ramtron.com PhilW "Geoffrey Mortimer" <me@privacy.net> wrote in message news:32t622F3pnqp1U1@individual.net...> Hi > > Anyone had any experience with Simtek non-volatile RAM - the sort that > writes all its data to (EEPROM?) in one hit when the supply falls below a > trigger level (type STK14CA8)? > > Cheers > Geoff > >