18F26j11 save config data?

Guest · Posted: Mon Oct 19, 2009 11:32 am

The 18F26j11 is without EEPROM, not happy with it:-(

I use RS232 to send some setup to the system, 10 byte!
How to store my config data on the fly when there is no EEPROM?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Add an external EEPROM chip. Use an eeprom driver from the CCS
drivers directory.

Guest · Posted: Mon Oct 19, 2009 12:10 pm

Yes it's a solution but I already use all the pin. Is it possible to use the internal ROM to store data?

bkamen · Posted: Mon Oct 19, 2009 12:16 pm

theoretically yes.

You would do a WRITE_PROGRAM_MEMORY to someplace.

The problem is: what is the block size and endurance of the FLASH. If you write seldom, then you're ok. If you write a lot, you could wreck the flash cells.

External EEPROMs are a different technology that allows for more write cycles.
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