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Ram chip for storage. — Parallax Forums

Ram chip for storage.

ArchiverArchiver Posts: 46,084
edited 2001-07-03 14:43 in General Discussion
Guys,

Can anyone sugest a serial ram chip that would be good to store rapidly changing data. I need to store about 4 bytes 3-5 times a second . So i really dont want to use a eeprom or flash. A battery backup would be optional·cause i could design in a battery.

Any suggestions??

Regards

Peter Rogers

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-07-02 19:00
    Philips' PCF8583 real time clock chip has 256 bytes of RAM. PCF8570 (if they
    still make it) is just the RAM...


    >
    > Can anyone sugest a serial ram chip that would be good to store rapidly
    > changing data. I need to store about 4 bytes 3-5 times a second . So i
    really
    > dont want to use a eeprom or flash. A battery backup would be optional·cause
    > i could design in a battery.



    Mike Hardwick, for Decade Engineering -- <http://www.decadenet.com>
    Manufacturer of the famous BOB-II Serial Video Text Display Module!
  • ArchiverArchiver Posts: 46,084
    edited 2001-07-02 20:20
    >Guys,
    >Can anyone sugest a serial ram chip that would be good to store
    >rapidly changing data. I need to store about 4 bytes 3-5 times a
    >second . So i really dont want to use a eeprom or flash. A battery
    >backup would be optional cause i could design in a battery.
    >Any suggestions??
    >Regards
    >Peter Rogers


    Hi Peter,
    Some serial clock chips like the DS1302 have RAM available for
    exactly this purpose. They are ready for battery backup.

    -- Tracy
  • ArchiverArchiver Posts: 46,084
    edited 2001-07-02 20:40
    If your project uses an LCD there may be a bit of RAM in there you
    can use.

    Rich

    --- In basicstamps@y..., Tracy Allen <tracy@e...> wrote:
    > >Guys,
    > >Can anyone sugest a serial ram chip that would be good to store
    > >rapidly changing data. I need to store about 4 bytes 3-5 times a
    > >second . So i really dont want to use a eeprom or flash. A battery
    > >backup would be optional cause i could design in a battery.
    > >Any suggestions??
    > >Regards
    > >Peter Rogers
    >
    >
    > Hi Peter,
    > Some serial clock chips like the DS1302 have RAM available for
    > exactly this purpose. They are ready for battery backup.
    >
    > -- Tracy
  • ArchiverArchiver Posts: 46,084
    edited 2001-07-03 14:43
    > >rapidly changing data. I need to store about 4 bytes 3-5 times a
    > >second . So i really dont want to use a eeprom or flash. A battery
    > >backup would be optional cause i could design in a battery.
    > >Any suggestions??
    > >Regards
    > >Peter Rogers
    >
    >
    > Hi Peter,
    > Some serial clock chips like the DS1302 have RAM available for
    > exactly this purpose. They are ready for battery backup.

    FRAM actually looks extremely promising ... no battery backup needed, acts
    like RAM preforms like EEPROM (without the wearing out aspect), etc. I like
    it and look forward to a project that needs it [noparse]:)[/noparse]. I haven't looked them
    over yet, but www.ramtron.com has lots of FRAM ads in my product news
    catalog .... could be some gotchas ... but I haven't looked for them yet.

    Take care all!
    John
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