describe

The STM32G474xB/xC/xE device is based on high-performance Arm ® Cortex ®- M4 32-bit RISC core. Their operating frequency can reach up to 170 megahertz.

The core of Cortex-M4 has a single precision floating-point unit (FPU) that supports all Arm single precision data processing instructions and all data types. It also implements a complete set of DSP (digital signal processing) instructions and a memory protection unit (MPU), thereby improving the security of the application program.

These devices are embedded in high-speed memory (512 kilobytes of flash memory, and 128 kilobytes of SRAM), a flexible external memory controller (FSMC) static memory (device pack 100 pins and more), a four SPI flash interface, and a wide range of enhanced I/O and peripheral devices connected to two APB buses, two AHB buses, and a 32-bit multi AHB bus matrix.

The device also incorporates several protection mechanisms for embedded flash memory and SRAM: read protection, write protection, secure memory area, and proprietary code read protection.

This device is embedded with peripherals and allows for mathematical/arithmetic acceleration functions (CORDIC is a trigonometric function, FMAC units are filter functions).

They provide 5 fast 12 bit ADCs (5Msps), 7 comparators, 6 operational amplifiers, 7 DAC channels (3 external and 4 internal), 1 internal voltage reference buffer, 1 low-power RTC, 2 universal 32-bit timers, 3 specialized 16 bit PWM timers for motor control, 7 universal 16 bit timers, 1 16 bit low-power timer, and 184 ps resolution high-resolution timers.

They also have standard and advanced communication interfaces, such as:

• Four I2Cs

Four SPIs and two half duplex I2S multiplexing

Three USARTs, two UARTs, and one low-power UART.

• Three FDCANs

• One SAI

• USB device

• UCPD

The device operates on a 1.71 to 3.6 V power supply in the temperature range of -40 to+85 ° C (+105 ° C) and -40 to+125 ° C (+130 ° C). A comprehensive energy-saving mode allows for the design of low-power applications.

Supports some independent power supplies, including analog independent power inputs for ADC, DAC, opamp, and comparators. VBAT input allows backup of RTC and registers.

The STM32G474xB/xC/xE series offers 9 packages, ranging from 48 to 128 pins.