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Embedded MicroSD Storage Device, TTL, DOS Compatible US$16.74

Embedded MicroSD Storage Device, TTL, DOS Compatible

The micro-DRIVE (µDRIVE-µSD-G1) is an extremely compact high-performance “Embedded Disk Drive” module that can be added easily to any microcontroller design that requires a DOS-compatible file and data storage system. Most microcontrollers have small and limited on-chip memory. For applications that require large volumes of data, the micro-DRIVE integrates the 4D-Systems GOLDELOX-DOS chip onto a tiny drop-in-module. A simple serial interface is all that is required to take away the burden of low-level design that otherwise would be required for the host controller.

The micro-DRIVE module utilizes off-the-shelf removable microSD memory cards of up to 2GB capacity, or microSDHC cards of higher capacity with limitations (see below). A handful of straightforward commands provides direct access to the memory card for storing and retrieving any size or type of data. Access to the card can be at (FAT-based) file levels or at raw disk byte levels. Applications can range from data logging, program storage, music files, image and video files, or any type of general-purpose data storage. So, next time your microcontroller application requires file/data storage, this micro-DRIVE may be the ideal solution.

The pictures to the right show a microSD card installed, but one is not included.

Using microSDHC Cards

The micro-DRIVE module is capable of having a microSDHC card up to 32GB inserted. However, due to the nature of the system, not all of this can be addressed. If using FAT, then a max of 4GB can be accessed and addressed. If using RAW, then a max of 8GB can be accessed and addressed. If using a combination of FAT and RAW, then a max of 12GB can be accessed and addressed.

Embedded MicroSD Storage Device Features

  • General-purpose data storage device with a simple serial interface that can be added to any design in a wide range of embedded applications
  • DOS-compatible file access (FAT16) as well as low-level access to card memory
  • On-board microSD memory card interface and adapter
  • Accommodates off-the-shelf microSD removable memory cards up to 2GB capacity or microSDHC up to 32GB (max 12GB addressable; see note above)
  • Simple serial commands provide full read/write access to the card
  • Easy 5-pin interface to any host device: VCC, TX, RX, GND, RESET
  • Serial interface (TTL levels) with auto-baud feature from 300 to 256K baud rates
  • Green LED Power and Memory Card detect indicator
  • Red LED Drive data access indicator
  • 3.6V to 5.5V range operation
  • Tiny footprint: 14.9 × 18.9 × 3.5 mm

Embedded MicroSD Storage Device Resources

  • uDRIVE Data Sheet
  • uDRIVE Command Set
  • Firmware PmmC file
  • 4D Workshop4 IDE Tool: This is a Windows-based software tool is used to program the PmmC file into the GOLDELOX-DOS processor. It also tests all of the high-level file-handling capability and the raw byte-level read/write options. For raw read/write, the ‘Protected FAT’ checkbox needs to be unchecked. You also can do random tests, available under the ‘Test’ tab.

Optional Recommended Products for this Item
microSDHC 4GB Flash Memory Card with Full-Size Adapter, Class 4+ US$6.50

This product was added to our catalog on Monday 20 June, 2011.


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