CH32C

CH32C is a family of 32-bit microcontrollers produced by Nanjing Qinheng Microelectronics, also known as WCH. The CH32C line is designed for cost-sensitive embedded applications and emphasizes USB connectivity, compact peripheral sets, and straightforward software development. It is one of several CH32 series variants intended to provide affordable options for USB-enabled devices and small-to-medium complexity controllers.

The core and memory characteristics of CH32C devices vary by model. Generally, CH32C MCUs use an ARM Cortex-M0 or Cortex-M0+ based core, operating at modest to mid-range clock speeds. Flash memory and SRAM capacities scale across the family, ranging from a few hundred kilobytes of flash with tens of kilobytes of RAM in smaller devices to larger configurations in higher-end parts. This scaling enables CH32C devices to support a range of applications from simple USB peripherals to more feature-rich embedded controllers.

Peripherals commonly found on CH32C MCUs include USB interfaces (often USB device, with some variants offering USB OTG capabilities), UARTs, SPI, I2C, and sometimes CAN. Additional features may include timers, PWM channels, ADCs, DACs, DMA, watchdog timers, and clock/power-management options. Many devices support low-power standby modes suitable for battery-powered applications, alongside standard timing and communication peripherals for integration into embedded systems.

Development and tooling for CH32C MCUs typically involve vendor-provided software libraries and examples, along with support for mainstream toolchains such as Keil MDK, IAR, and GCC-based environments. Documentation, datasheets, and application notes from Nanjing Qinheng Microelectronics guide users through hardware initialization, USB stacks, and peripheral configuration.

See also: CH32V and CH32F families, Nanjing Qinheng Microelectronics. References: manufacturer datasheets and product pages.