The GD32F303xx devices belong to the mainstream series of the GD32 MCU family. It is a new generation 32-bit general-purpose microcontroller based on the ARM Cortex-M4 RISC core, offering the best cost-performance ratio with enhanced processing capability, reduced power consumption, and a peripheral set. The Cortex-M4 core implements a full DSP instruction set to meet the market demand for digital signal control that requires a combination of efficient and easy-to-use control and signal processing capabilities. It also provides a Memory Protection Unit (MPU) and powerful tracing technology to enhance application security and advanced debugging support. The GD32F303xx device integrates an ARM Cortex-M4 32-bit processor core operating at a frequency of 120 MHz, and Flash access is zero-wait state for maximum efficiency. It provides up to 3072 KB of on-chip Flash memory and 96 KB of SRAM memory. The I/O interfaces are widely enhanced and connected to two APB buses. The device provides up to three 12-bit 2.6 MSPS ADCs, two 12-bit DACs, up to ten general-purpose 16-bit timers, two 16-bit PWM advanced control timers, and two 16-bit basic timers, as well as standard and advanced communication interfaces: up to three SPIs, two I2Cs, three USARTs and two UARTs, two I2Ss, one USB 2.0 FS, one CAN, and one SDIO. The operating voltage range of the device is 2.6 to 3.6 V, and the operating temperature range is -40 to +85°C. Multiple power-saving modes provide maximum flexibility in optimizing the trade-off between wake-up latency and power consumption, which is particularly important in low-power applications. The above features make the GD32F303xx devices suitable for a wide range of interconnected and advanced application fields, especially in industrial control, motor drive, consumer electronics and handheld devices, human-machine interfaces, security alarm systems, POS terminals, automotive navigation, Internet of Things, and other areas.