Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

Re: Usage of the Flash as Data EEPROM

2004-12-28 by embeddedjanitor

Look at the IAP application note on the Philips web site.

--- In lpc2000@yahoogroups.com, "varuzhandanielyan" <dan@x> wrote:
> 
> There are cases, when some data, like node address or hardware 
> dependent constants, should be reprogrammed only several times 
during 
> the whole system life.  And if there is a free flash, why do not use 
> it, instead of an external EEPROM?  My question is just about such a 
> case.
> Except the flash programming examples, which I still need, maybe one 
> can reference me to a document, where is a detailed description of 
> commands, needed for it. 
> 
> Varuzhan
> 
> --- In lpc2000@yahoogroups.com, "Gus" <gus_is_working@y...> wrote:
> > 
> > that doesn't mean you can use it as EEPROM!!! on an EEPROM you can 
> > rewrite one byte, but on flash, you have to erase a full sector in 
> > order to rewritre a byte. so, if you are changing full sectors of 
> > data then yes you can use it but if you are changing multiple 
bytes 
> > an deverytime you change a byte you arase a sector you can ware it 
> > out quickly.
> > 
> > I guess the answer would depends on how many times you need to 
> erase 
> > a sector in your product life cycle
> > 
> > Gus
> > --- In lpc2000@yahoogroups.com, "varuzhandanielyan" <dan@x> wrote:
> > > 
> > > In the new data sheet for LPC2129 one can see, that minimal
> > > write cycles is 100,000 as many as of the data EEPROM of many
> > > microcontrollers.
> > > 
> > > Varuzhan
> > > 
> > > 
> > > --- In lpc2000@yahoogroups.com, "acetoel" <acetoel@y...> wrote:
> > > > 
> > > > Hello...
> > > > 
> > > > I also though about that, never implement ir becuase the Flash 
> > has a
> > > > limited cycles of life. So It's better to use an SPI, unless 
> you 
> > > only
> > > > need to write it once (when programming), and read it when
> > > > running...but it's no sense....
> > > > 
> > > > Bye
> > > > Ezequiel
> > > > 
> > > > --- In lpc2000@yahoogroups.com, "varuzhandanielyan" <dan@x> 
> > wrote:
> > > > > 
> > > > > Dear All,
> > > > > 
> > > > > Is there somewhere availabe an example for LPC2100 how to
> > > > > use the flash for data storage? 
> > > > > 
> > > > > Thank you,
> > > > > Varuzhan

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.