GD32F303xx devices belong to the mainstream product line of the GD32 MCU series. It is a brand-new 32-bit general-purpose microcontroller based on the ARM Cortex-M4 RISC core, offering the best cost-performance ratio in terms of enhanced processing capability, reduced power consumption, and peripheral set. The Cortex-M4 core features a full set of DSP instructions to meet the needs of the digital signal control market for efficient and easy-to-use control and signal processing capabilities. It also provides a Memory Protection Unit (MPU) and powerful trace 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, with zero-wait-state Flash access for maximum efficiency. It provides up to 3072 KB of on-chip Flash memory and 96 KB of SRAM memory. A wide range of enhanced I/Os and peripherals are connected to two APB buses. These devices offer 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 device operates at a voltage of 2.6 to 3.6 V, with an operating temperature range of -40 to +85 °C. Several power-saving modes provide maximum optimization flexibility between wake-up latency and power consumption, which is a particularly important consideration in low-power applications. The above features make GD32F303xx devices suitable for a wide range of interconnected and advanced applications, especially in fields such as industrial control, motor drive, consumer and handheld devices, human-machine interfaces, security and alarm systems, POS, automotive navigation, IoT, etc.