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Multi-Media Card Reader

Project description
Build a hardware interface to read MultiMedia cards using SPI on an 8 bit bus.

Why a MultiMediaCard?

Here are some of the flash memory standards available at this time:
  • Memory Stick: Proprietary flash memory standard.
  • Compact Flash: Good standard as it can be used where an ATA type hard drive would be used with an interface.  High pin count for device and other cost issues prevented me from using this standard.
  • SmartMedia: Not as friendly an interface, and connectors to interface with cards not available (I am sure that there is a source for these, however I could not locate one).  Has memory size limitations with current standards.
  • MultiMedia: Flash memory with benefits of size, small pin count, hot swapping, connectors available from DigiKey, and SPI type interface option.