STM32G473CB datasheet(21/229 Pages) STMICROELECTRONICS

21 / 229 page

DS12712 Rev 5

21/229

STM32G473xB STM32G473xC STM32G473xE

Functional overview

3.7

Boot modes

At startup, a BOOT0 pin (or nBOOT0 option bit) and an nBOOT1 option bit are used to

select one of three boot options:

•

Boot from user flash memory

•

Boot from system memory

•

Boot from embedded SRAM

The BOOT0 value may come from the PB8-BOOT0 pin or from an nBOOT0 option bit

depending on the value of a user nBOOT_SEL option bit to free the GPIO pad if needed.

The boot loader is located in the system memory. It is used to reprogram the flash memory

by using USART, I2C, SPI, and USB through the DFU (device firmware upgrade).

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.

STM32G473CB 数据表(PDF) 21 Page - STMicroelectronics

STM32G473CB 数据表(HTML) 21 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载