1# STM32G431-Nucleo BSP Introduction 2 3**English** | [中文](README_zh.md) 4 5## MCU: STM32G474RB @170MHz, 512KB FLASH, 128KB RAM 6 7The STM32G474xB/xC/xE devices are based on the high-performance Arm® Cortex®-M4 32-bit RISC core. They operate at a frequency of up to 170 MHz. The Cortex-M4 core features a single-precision floating-point unit (FPU), which supports all the Arm single-precision data-processing instructions and all the data types. It also implements a full set of DSP (digital signal processing) instructions and a memory protection unit (MPU) which enhances the application’s security. 8These devices embed high-speed memories (up to 512 Kbytes of Flash memory, and 128 Kbytes of SRAM), a flexible external memory controller (FSMC) for static memories (for devices with packages of 100 pins and more), a Quad-SPI Flash memory interface, and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix. 9The devices also embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, securable memory area and proprietary code readout protection. 10The devices embed peripherals allowing mathematical/arithmetic function acceleration (CORDIC for trigonometric functions and FMAC unit for filter functions). 11They offer five fast 12-bit ADCs (4 Msps), seven comparators, six operational amplifiers, seven DAC channels (3 external and 4 internal), an internal voltage reference buffer, a low-power RTC, two general-purpose 32-bit timers, three 16-bit PWM timers dedicated to motor control, seven general-purpose 16-bit timers, and one 16-bit low-power timer, and high resolution timer with 184 ps resolution. 12They also feature standard and advanced communication interfaces such as: 13\- Four I2Cs 14\- Four SPIs multiplexed with two half duplex I2Ss 15\- Three USARTs, two UARTs and one low-power UART. 16\- Three FDCANs 17\- One SAI 18\- USB device 19\- UCPD 20The devices operate in the -40 to +85 °C (+105 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to 3.6 V power supply. A comprehensive set of power-saving modes allows the design of low-power applications. 21Some independent power supplies are supported including an analog independent supply input for ADC, DAC, OPAMPs and comparators. A VBAT input allows backup of the RTC and the registers. 22The STM32G474xB/xC/xE family offers 9 packages from 48-pin to 128-pin. 23 24#### KEY FEATURES 25 26- Core: Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator) allowing 0-wait-state execution from Flash memory, frequency up to 170 MHz with 213 DMIPS, MPU, DSP instructions 27- Operating conditions: 28 - VDD, VDDA voltage range: 1.71 V to 3.6 V 29- Mathematical hardware accelerators 30 - CORDIC for trigonometric functions acceleration 31 - FMAC: filter mathematical accelerator 32- Memories 33 - 512 Kbytes of Flash memory with ECC support, two banks read-while-write, proprietary code readout protection (PCROP), securable memory area, 1 Kbyte OTP 34 - 96 Kbytes of SRAM, with hardware parity check implemented on the first 32 Kbytes 35 - Routine booster: 32 Kbytes of SRAM on instruction and data bus, with hardware parity check (CCM SRAM) 36 - External memory interface for static memories FSMC supporting SRAM, PSRAM, NOR and NAND memories 37 - Quad-SPI memory interface 38- Reset and supply management 39 - Power-on/power-down reset (POR/PDR/BOR) 40 - Programmable voltage detector (PVD) 41 - Low-power modes: sleep, stop, standby and shutdown 42 - VBAT supply for RTC and backup registers 43- Clock management 44 - 4 to 48 MHz crystal oscillator 45 - 32 kHz oscillator with calibration 46 - Internal 16 MHz RC with PLL option (± 1%) 47 - Internal 32 kHz RC oscillator (± 5%) 48- Up to 107 fast I/Os 49 - All mappable on external interrupt vectors 50 - Several I/Os with 5 V tolerant capability 51- Interconnect matrix 52- 16-channel DMA controller 53- 5 x 12-bit ADCs 0.25 µs, up to 42 channels. Resolution up to 16-bit with hardware oversampling, 0 to 3.6 V conversion range 54- 7 x 12-bit DAC channels 55 - 3 x buffered external channels 1 MSPS 56 - 4 x unbuffered internal channels 15 MSPS 57- 7 x ultra-fast rail-to-rail analog comparators 58- 6 x operational amplifiers that can be used in PGA mode, all terminals accessible 59- Internal voltage reference buffer (VREFBUF) supporting three output voltages (2.048 V, 2.5 V, 2.9 V) 60- 17 timers: 61 - HRTIM (Hi-Resolution and complex waveform builder): 6 x16-bit counters, 184 ps resolution, 12 PWM 62 - 2 x 32-bit timer and 2 x 16-bit timers with up to four IC/OC/PWM or pulse counter and quadrature (incremental) encoder input 63 - 3 x 16-bit 8-channel advanced motor control timers, with up to 8 x PWM channels, dead time generation and emergency stop 64 - 1 x 16-bit timer with 2 x IC/OCs, one OCN/PWM, dead time generation and emergency stop 65 - 2 x 16-bit timers with IC/OC/OCN/PWM, dead time generation and emergency stop 66 - 2 x watchdog timers (independent, window) 67 - 1 x SysTick timer: 24-bit downcounter 68 - 2 x 16-bit basic timers 69 - 1 x low-power timer 70- Calendar RTC with alarm, periodic wakeup from stop/standby 71- Communication interfaces 72 - 3 x FDCAN controller supporting flexible data rate 73 - 4 x I2C Fast mode plus (1 Mbit/s) with 20 mA current sink, SMBus/PMBus, wakeup from stop 74 - 5 x USART/UARTs (ISO 7816 interface, LIN, IrDA, modem control) 75 - 1 x LPUART 76 - 4 x SPIs, 4 to 16 programmable bit frames, 2 x with multiplexed half duplex I2S interface 77 - 1 x SAI (serial audio interface) 78 - USB 2.0 full-speed interface with LPM and BCD support 79 - IRTIM (infrared interface) 80 - USB Type-C™ /USB power delivery controller (UCPD) 81- True random number generator (RNG) 82- CRC calculation unit, 96-bit unique ID 83- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™ 84 85 86 87## Read more 88 89| Documents | Description | 90| :----------------------------------------------------------: | :----------------------------------------------------------: | 91| [STM32_Nucleo-64_BSP_Introduction](../docs/STM32_Nucleo-64_BSP_Introduction.md) | How to run RT-Thread on STM32 Nucleo-64 boards (**Must-Read**) | 92| [STM32G474RE ST Official Website](https://www.st.com/en/microcontrollers-microprocessors/stm32g474re.html#documentation) | STM32G474RB datasheet and other resources | 93 94 95 96## Maintained By 97 98[mazhiyuan](https://github.com/cndabai), <mazhiyuan@rt-thread.com>