Re: [avr-chat] AVR EEPROM cell: Does 0xff mean it it is erased?

[David Kelly]

On Oct 18, 2009, at 7:55 AM, Joerg Wunsch wrote:

> "Heike C. Zimmerer" <address@hidden> wrote:
>
> > can I safely assume that if an EEPROM cell contains 0xff, it doesn't
> > need to be erased before writing to it?
>
> Yes, you can.  Programming flash or EEPROM cells always goes from '1'
> to '0', so a cell containing all '1' is erased.

IIRC only Freescale HC12 flash erases to 0. At least thats the only I  
have encountered.

--
David Kelly N4HHE, address@hidden
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Whom computers would destroy, they must first drive mad.