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Retired Product

This product has been retired from our catalog and is no longer for sale. This page is made available for those looking for datasheets and the simply curious.

Creative Commons images are CC BY-NC-SA 3.0

Description: The new uM-FPU v3.1 by Micromega has all the proven features of the v3 with some interesting new GPS NMEA string parsing features. The uM-FPU v3.1 chip interfaces to virtually any microcontroller using a SPI, I2C, or serial interface, making it ideal for applications requiring floating point math, including sensor readings, robotic control, GPS, data transformations and other embedded control applications. The uM-FPU v3.1 chip supports 32-bit IEEE 754 compatible floating point and 32-bit integer operations. The uM-FPU v3.1 is RoHS compliant, operates from a 2.7V, 3.3V or 5V supply, and is available in 18-pin DIP, SOIC-18 or QFN-44 packages.

Interface examples are available for BASIC Stamp, Javelin, PICAXE, 16F87x, ARMmite, and ARMexpress controllers.

Features:

  • 18-pin Wide SOIC
  • Supports both I2C, SPI, and serial interfaces
  • 256 byte instruction buffer
  • 128 general purpose 32-bit registers for storing floating point or long integer values
  • 8 temporary 32-bit registers to support parentheses in calculations
  • 2048 bytes Flash memory for user-defined functions
  • 1024 bytes EEPROM for data storage or user-defined functions
  • 10 to 20 times faster than uM-FPU V2 for all floating point operations
  • Up to 70 times faster for advanced instructions
  • Supports 2.7V, 3.3V and 5V supply voltage
  • I2C compatible interface up to 400 kHz
  • SPI compatible interface up to 15 MHz
  • Expanded instruction set, matrix operations, A/D conversion, string handling
  • Easy migration from uM-FPU V2
  • See What’s New in V3 for more details on new features

Floating Point Operations:

  • Tons of new functions
  • Set, Add, Subtract, Multiply, Divide
  • Sqrt, Log, Log10, Exp, Exp10, Power, Root
  • Sin, Cos, Tan
  • Asin, Acos, Atan, Atan2
  • Floor, Ceil, Round, Min, Max, Fraction
  • Negate, Abs, Inverse
  • Convert Radians to Degrees
  • Convert Degrees to Radians
  • Compare, Status

Long Integer Operations:

  • Set, Add, Subtract, Multiply, Divide, Unsigned Divide
  • Negate, Abs
  • Compare, Unsigned Compare, Status

Conversion Functions:

  • Convert 8-bit and 16-bit integers to floating point
  • Convert 8-bit and 16-bit integers to long integer
  • Convert long integer to floating point
  • Convert floating point to long integer
  • Convert floating point to ASCII
  • Convert floating point to formatted ASCII
  • Convert long integer to ASCII
  • Convert long integer to formatted ASCII
  • Convert ASCII to floating point
  • Convert ASCII to long integer

Documents:

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Customer Comments

  • NB - this product comes marked as a Microchip dsPIC (the ones I have here are dsPIC30F3012). This confused the heck out of me, but I guess it turns out these FPUs are implemented in a dsPIC. Crazy!

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