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SPI Memory 128Mb (16MB) — Parallax Forums

SPI Memory 128Mb (16MB)

Cluso99Cluso99 Posts: 18,069
edited 2008-10-30 19:49 in Propeller 1
FWIW: I have just seen a Spansion SPI memory with 16MBytes of Flash at 3V. Spansion was a joint venture betwen AMD and Fujitsu.

These memories are being used to configure Xilinx FPGA's.

Given·the density, I thought it may be useful for the propeller. No idea of cost. The pinout (8 pin)·is different from I2C (and·protocol). Also supposedly faster (haven't checked).

http://www.spansion.com/flash_memory_products/serial_interface.html

·

Comments

  • rjo_rjo_ Posts: 1,825
    edited 2008-10-29 11:49
    great concept

    https://emwcs.avnet.com/webapp/wcs/stores/servlet/Product_-1_500201_500201_part_0_5719814

    about $5
  • T&E EngineerT&E Engineer Posts: 1,396
    edited 2008-10-29 12:18
    Is this RAM (like FRAM) with variables or just for data storage and logging (like EEPROM)? I would like to look into this for the SX28 chip but it runs off of 3 volts so that would be more of a problem.
  • Mike HuseltonMike Huselton Posts: 746
    edited 2008-10-29 12:59
    Gravy!

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    JMH - Electronics: Engineer - Programming: Professional
  • Bill HenningBill Henning Posts: 6,445
    edited 2008-10-29 15:12
    Great find, I have to get some smile.gif

    Best,

    Bill
    Cluso99 said...
    FWIW: I have just seen a Spansion SPI memory with 16MBytes of Flash at 3V. Spansion was a joint venture betwen AMD and Fujitsu.


    These memories are being used to configure Xilinx FPGA's.



    Given the density, I thought it may be useful for the propeller. No idea of cost. The pinout (8 pin) is different from I2C (and protocol). Also supposedly faster (haven't checked).



    http://www.spansion.com/flash_memory_products/serial_interface.html
    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    www.mikronauts.com - a new blog about microcontrollers
  • cimplexcimplex Posts: 11
    edited 2008-10-29 20:20
    Just looked at their website & brochures. They list 100k writes as max, but I didn't see anything on wear leveling, so I'm guessing that its up to the user to implement his own?
  • mirrormirror Posts: 322
    edited 2008-10-29 23:24
    This chip is not that great - as far as I can tell from the data sheets.

    From the data sheet: It has a page size of 256 bytes. The page write command takes typically 1.5ms (but up to 3ms). So the peak data write rate is 256 / 1.5ms = 170K bytes per second.

    This is slower than SD, for which some quite good SPI drivers have already been written.

    BTW, you don't *have* to use FSRW with SD cards. In fact you don't have to use any file system at all if you don't want to.

    Secondly, I can buy SD cards at my local food store!

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  • rjo_rjo_ Posts: 1,825
    edited 2008-10-30 19:49
    The serial read speed looks like it would be around 5MB/s...

    I don't know how that compares to an SD[noparse]:)[/noparse]
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