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What overhead is associated with the uM-FPU V3 coprocessor?

April 26, 2017associated coprocessor overhead um-fpu v3

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What overhead is associated with the uM-FPU V3 coprocessor?

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The microcontroller needs to send instructions and data to the coprocessor and read the results after calculations are complete. The main overhead is the time required to transfer information between the microcontroller and uM-FPU. The uM-FPU V3 chip has a 256 byte instruction buffer which allows calculations to be done while data is being transferred. The microcontroller is free to perform other tasks while the uM-FPU performs floating point calculations. The uM-FPU has 128 32-bit registers and 1024 bytes of EEPROM, for storing floating point values on the uM-FPU rather than consuming code and data space on the microcontroller. User-defined functions can also be used to improve execution speed and reduce code space. With user-defined functions, only input data and results need to be transmitted.