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SX external storage — Parallax Forums

SX external storage

kingnebkingneb Posts: 65
edited 2005-10-27 01:56 in General Discussion
What chip should I use for external storage for an SX microcontroller? The SX has to write to it and read from it.

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Comments

  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-10-23 16:10
    The easiest is a serial EEPROM or FRAM chip.

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  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-10-23 16:12
    The SX/B help file shows how to connect to an EEPROM/FRAM using I2C.

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    Jon Williams
    Applications Engineer, Parallax
  • Keith MKeith M Posts: 102
    edited 2005-10-27 01:56
    I've found that using Ramtron's serial FRAM is very nice and easy.

    Fast serial speeds, max speed is upwards of 15-25 mbps

    uses only a few pins (parallel memory can eat pins like crazy)

    non-volatile w/ no battery backup

    easy to write to in SX/B or asm

    Largest capacity is about 32k bytes, but you can use multiple chips in parallel all sharing a bus

    http://www.ramtron.com/doc/Products/serial.asp

    I'm using one of the FM25256 in a project right now at about 7mbps and it works perfectly.

    Keith
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