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Flash, EEPROM, PROM or external storage?

Discussion in 'Electronic Design' started by Ghazan Haider, Jul 11, 2003.

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  1. In a project of a small computer using an ARM720 MCU with built in
    sdram and flash controllers, what is the cheapest storage solution for
    8-32 megabytes? Most designs Ive seen use flash, but I thought EEPROM
    was cheaper. I havent seen PROM in sizes larger than 2MB either. Is
    compactflash cheaper than boot block flash chips?
  2. Only in very tiny sizes (<1Mb)

    I don't think anyone still use PROM.
    I expect so, for large enough sizes.

    Suggest you use a "boot block flash chip". I suspect that your ARM
    cannot boot directly from compact flash anyway (I may be wrong here, I
    don't know much about CF or which ARM variant you have for that matter!).
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