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Express Logic FileX file system
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FileX® (ST EXP-FILE) is Express Logic's high-performance MS-DOS compatible file system. It is fully integrated with ThreadX® and is available for STMicroelectronics' STM32 ARM® Cortex®-M based 32-bit microcontrollers. Like ThreadX®, FileX® is designed to have a small footprint and high-performance, making it ideal for today's deeply embedded applications that require file operations.

FileX® optimizes all file access in embedded environments. This is accomplished with an internal logical sector cache that FileX® automatically configures based on how much memory the application specifies when the media is opened. In addition to FileX®'s logical sector cache, FileX® also provides optimized file seek processing and the ability to pre-allocate contiguous clusters for files.

This product is supplied by a third party not affiliated to ST. For complete and latest information on the specification and the purchased parts package, refer to the third party’s website

Key Features

  • Complete STM32 family support
  • Reasonable pricing
  • Royalty-free
  • Complete ANSI C source code
  • Easy to use and powerful services
  • Responsive technical support
  • Unlimited media and files
  • Sector caching available
  • Fast file seeking
  • Complete MS-DOS 12/16/32-bit FAT compatibility
  • Size scales automatically
  • Contiguous cluster pre-allocation supported
  • Small footprint (Instruction area size: 8-30 KB)
  • Long file name support
  • Consecutive cluster Read/Write
  • Internal logical sector cache
  • Simple RAM-Disk demo
  • Multiple partition support
  • CD-ROM support

Sample & Buy

Part Number Marketing StatusSupplierThird Party link

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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