The GD32F303xx devices belong to the mainstream product line of the GD32 MCU family. It is a new 32-bit general-purpose microcontroller based on the Arm Cortex-M4 RISC core, offering the best performance-to-cost ratio in terms of enhanced processing power, reduced power consumption, and peripherals. The Cortex-M4 core implements a complete set of DSP instructions to meet the demands of the digital signal control market for high efficiency and ease of use in control and signal processing capabilities. It also provides a Memory Protection Unit (MPU) and robust trace technology to enhance application security and advanced debugging support. The GD32F303xx devices integrate an Arm Cortex-M 32-bit processor core operating at 120 MHz with zero-wait-state Flash access.