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    23a256 avr

    i need an external memory with infinity read/write cycles to connect the AVR microcontroller to update valuable data ..

    any part number ?

    the size is not important .

    thx

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    i need an external memory with infinity read/write cycles?

    FRAMs are said to have effectively infinite endurance under usual application conditions. You may want to check the respective documents, to check if it's also true for your application. www.ramtron.com



    •   Alt24th July 2009, 10:20

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    i need an external memory with infinity read/write cycles?

    FRAM is little costlier /density. You may also like to use Wear levelling technique. But that choice will depend on the cost benifit from the two solutions.



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    i need an external memory with infinity read/write cycles?

    great thanks

    i choose AT45DB161B !

    any idea???



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    Re: i need an external memory with infinity read/write cycle

    Quote Originally Posted by segmex
    i choose AT45DB161B !
    any idea???
    The AT45DB161B is an obsolete part - the replacement is the AT45DB161D. However, neither of those parts have an infinate number of read/write cycles. I beleive the 'D' part's endurance is 100,000 cycles.



    •   Alt24th July 2009, 16:54

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    i need an external memory with infinity read/write cycles?

    but in AT45DB161B datasheet the number of endurance isnt mentioned?

    i need a part number ?

    any help???



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    Re: i need an external memory with infinity read/write cycle

    I choose AT45DB161B !
    As this statement is obviously contradicting your initial defined requirements, you may want to clarify your specification. The fact, that Atmel doesn't specify an endurance for Data Flash family does not imply infinite read/write cycles.



    •   Alt24th July 2009, 18:11

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    i need an external memory with infinity read/write cycles?

    Since size is not important a DS1307 has 64 bytes battery backed up SRAM.



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    i need an external memory with infinity read/write cycles?

    since size doesn't matter, I would go with a battery powered flip-flop.

    1-bit!



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    i need an external memory with infinity read/write cycles?

    Does it have to be electronics type, else other possibilities open up !!



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    i need an external memory with infinity read/write cycles?

    If you only need 8-32KBytes you could consider a battery-backed SRAM. Microchip has a couple (23A640/23K640 & 23A256/23K256) as does AMI Semiconductor (N256S0830HDA). These only draw a few uA in standby mode.


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    i need an external memory with infinity read/write cycles?

    great thx 4 ur suggestions .

    N256S0830HDA is good but it needs backup battery.
    i really need a flash without any backups.

    i think i should use MMC/DV cards.

    any idea?



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    i need an external memory with infinity read/write cycles?

    MMC/DV cards are flash and not unlimited writes.

    What are you building that needs unlimited writes?



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    Re: i need an external memory with infinity read/write cycle

    Quote Originally Posted by segmex
    i think i should use MMC/DV cards.
    There are no FLASH based devices that will support unlimited writes. These include all forms of multi-media cards (MMC, CF, SD, etc.).



    •   Alt25th July 2009, 02:57

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    Re: i need an external memory with infinity read/write cycle

    Quote Originally Posted by blueroomelectronics
    MMC/DV cards are flash and not unlimited writes.

    What are you building that needs unlimited writes?
    i am designing embedded based system that its updating data is valuable.

    the power that the system uses is not reliable and it turns off and on .

    i think the backup battery should be used.

    any idea?



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