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STM32G474XB Datasheet(PDF) 21 Page - STMicroelectronics

Part # STM32G474XB
Description  Arm® Cortex®-M4 32b MCUFPU, up to 512 KB Flash, 170 MHz / 213 DMIPS, 128 KB SRAM, rich analog, math accelerator, 184ps 12ch Hi-res timer
PDF  232 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32G474XB Datasheet(HTML) 21 Page - STMicroelectronics

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DS12288 Rev 1
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STM32G474xB STM32G474xC STM32G474xE
Functional overview
47
3.8
CORDIC
The CORDIC provides hardware acceleration of certain mathematical functions, notably
trigonometric, commonly used in motor control, metering, signal processing and many other
applications.
It speeds up the calculation of these functions compared to a software implementation,
allowing a lower operating frequency, or freeing up processor cycles in order to perform
other tasks.
Cordic features
•
24-bit CORDIC rotation engine
•
Circular and Hyperbolic modes
•
Rotation and Vectoring modes
•
Functions: Sine, Cosine, Sinh, Cosh, Atan, Atan2, Atanh, Modulus, Square root,
Natural logarithm
•
Programmable precision up to 20-bit
•
Fast convergence: 4 bits per clock cycle
•
Supports 16-bit and 32-bit fixed point input and output formats
•
Low latency AHB slave interface
•
Results can be read as soon as ready without polling or interrupt
•
DMA read and write channels
3.9
Filter mathematical accelerator (FMAC)
The filter mathematical accelerator unit performs arithmetic operations on vectors. It
comprises a multiplier/accumulator (MAC) unit, together with address generation logic,
which allows it to index vector elements held in local memory.
The unit includes support for circular buffers on input and output, which allows digital filters
to be implemented. Both finite and infinite impulse response filters can be realized.
The unit allows frequent or lengthy filtering operations to be offloaded from the CPU, freeing
up the processor for other tasks. In many cases it can accelerate such calculations
compared to a software implementation, resulting in a speed-up of time critical tasks.



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