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javad
Member

Join Date: Sep 2007
Posts: 6

Flash Memory vs. EEPROM

02/06/2009 6:55 AM

hi

I do a project with AVR mega 16, and I need EEPROM memory, but the size of this memory in this micro is not enough for me, I wanna know how I can use FLASH memory instead of EEPROM memory.

I work with Codvision compiler; is any function in it for use FLASH mem instead of EEPROM mem?

thank you.
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HVACR Drill
Member

Join Date: Dec 2008
Posts: 8
#1

Re: Flash Memory vs. EEPROM

02/07/2009 9:52 AM

You can purchase flash memory IC that is controlled by I2 or SPI. There are examples of how to use flash on AVR Freaks web site.
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marcot
Guru
Canada - Member - Specialized in power electronics

Join Date: Feb 2008
Location: Montreal, Canada.
Posts: 1372
Good Answers: 80
#2

Re: Flash Memory vs. EEPROM

02/07/2009 11:07 AM

The main difference between EEPROM and FLASH is the way you can write data into memory. EEPROM allow you to write each bite independently, while the FLASH forces you to do it by sectors. This makes the FLASH more efficient as far as transistor are concerned, but removes some of the flexibility.

It all depends on the type of data that you want to save in the memory. FLASH are also less expensive per byte and reach higher capacity.

Those memories are both slow. They cannot be written and real-time like RAM can.

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