The GD32C2x1 series MCUs significantly enhance computational performance and peripheral specifications while maintaining excellent price competitiveness, achieving an ultra-high cost-performance upgrade. This series adopts Arm’s advanced Cortex®-M23 core architecture, delivering 10% higher performance than the Cortex®-M0+, with a main frequency of up to 48 MHz. It features efficient processing capabilities such as single-cycle multiplication and integer division, greatly improving software execution efficiency. For memory configuration, it is equipped with 32KB–64KB of highly reliable embedded Flash and 12KB of low-power SRAM, with all memory areas featuring ECC error correction. To meet the needs of diverse application scenarios, it offers multiple package options, including TSSOP20/LGA20, QFN28, LQFP32/QFN32, and LQFP48/QFN48. The GD32C2x1 series MCUs provide up to four general-purpose 16-bit timers and one 16-bit advanced timer. They are equipped with two high-speed SPI interfaces (supporting four-wire QSPI mode at 24 Mbps), two I2C interfaces (supporting Fast Mode+ at 1 Mbps), and three UARTs (at 6 Mbps), integrated with three DMA controllers and one I2S, ensuring efficient communication. These MCUs are ideal for applications such as small household appliances, white goods, BMS battery management systems, small display devices, portable consumer electronics, industrial auxiliary control systems, and automotive aftermarket equipment.