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Smart-meter File System - SMFS

Smart-meter File System (SMFS)

Smart-meter systems must meet significant technical challenges in order to lower manufacturing cost, power consumption and achieve high reliability. HCC has developed an advanced Smart-meter File System (SMFS) custom designed for the needs of smart-energy and smart-meter applications. This can result in lower cost of manufacturing, shorter development time, reduced field maintenance and longer guaranteed life of operation.

New Approach

Instead of using a traditional file based system HCC has taken the radical approach of defining a system built around the needs of smart-meters. Metering applications usually have well defined record structures and HCC has used its’ extensive flash experience to take advantage of this characteristic. By taking a data focused, and not a file focused approach, it is possible reduce the required number of write/erase cycles by an order of magnitude. Traditional file systems do not have built-in cyclic buffer logic for storing records and this can add complexity, significantly increasing the number of times flash must be accessed. SMFS uses a structured database to reduce complexity of the application which can improve the performance in almost every way; speed, power consumption, and flash life.

Benefits of SMFS

  • Fail-safe data storage for guaranteed system recovery.
  • Persistent data storage for 15 years or more.
  • Features developed to significantly lower manufacturing BOM cost.
  • Minimum number of flash operations to preserve both the flash and the battery.
  • Deterministic behavior in the event of unexpected reset.