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33mbit SPI Flash with SRAM Buffer looks interesting — Parallax Forums

33mbit SPI Flash with SRAM Buffer looks interesting

tonyp12tonyp12 Posts: 1,951
edited 2014-01-18 01:52 in Propeller 1
It got two 528byte SRAM buffers that you can write to and then copy it to main page, but you could also write to main page directly to leave sram intact.
I could see where you copy main page to buffer, change just a few bytes and then send the command for copy-buffer-to-main-page-with-erase.
http://www.mouser.com/Semiconductors/Memory/Flash/_/N-488w1Zscv7?Keyword=AT45DB321E&Ns=Pricing%7c0&FS=True
It's not quadspi but Prop1 is not very good at that anyway.

Comments

  • Tracy AllenTracy Allen Posts: 6,664
    edited 2014-01-17 18:16
    That 45DB "dataFlash" series used to be an Atmel product. It looks like they have spun it off completely to this new company, Adesto Technologies. I've used the 8Mbit version for years as a great RAM+flash add-on for the memory-starved BASIC Stamp. The dual buffers also make it fast enough for streaming.
  • jmgjmg Posts: 15,173
    edited 2014-01-18 01:52
    33mbit SPI Flash with SRAM Buffer looks interesting

    The 45DB is quite old, but there are QuadSPI SRAMS and QuasSPI flash, but no one yet does both in one package.
    That would be a useful device, if it had the ability to copy internally Flash <-> RAM
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