Features: [CH32V003F4P6-EVT-R0]QingKe 32-bit RISC-V2A processor with 2-level interrupt nesting support; Up to 48MHz system main frequency; 2KB SRAM, 16KB Flash; Power supply voltage: 3.3/5V Multiple low-power modes: Sleep, Standby Power up/down reset, programmable voltage detector 1 group of 1-channel general-purpose DMA controller; 1 group of OPA; 1 group 10-bit ADC; 1 16-bit advanced-control timer and 1 16-bit general-purpose timer; 2 watchdog timers and 1 32-bit SysTick timer; 1 USART interface, 1 group of IC interface, 1 group of SPI interface; 18 I/O ports, mapping an external interrupt; 64-bit chip unique ID; 1-wire serial debug interface(SDI) CH32V003 series is based on the QingKe RISC-V2A core design of industrial-grade general-purpose microcontroller, support 48MHz system main frequency, with wide voltage, 1-wire SDI, low-power consumption, ultra-small package, etc. CH32V003 series built-in a group of DMA controller, a group of 10-bit ADC, a group of OPA, multiple timers and standard communication interfaces USART, IC, SPI, etc. Features: [CH32V203C8T6-EVT-R0] Qingke V4B, up to 144MHz system clock frequency. Single-cycle multiplication and hardware division. 20KB SRAM, 64KB Flash. Supply voltage: 2.5V/3.3V. GPIO unit is supplied independently. Low-power modes: sleep/stop/standby. Down to 44.65uA/MHz in Run mode. Down to 17.90uA/MHz in Sleep mode. Power-on/power-down reset (POR/PDR), programmable voltage detector (PVD). 1 x 18-channel general DMA controllers. 2 amplifiers. 10-channel 12-bit ADC, 10-channel TouchKey. 4 timers. One USB2.0 full-speed host/device interface. One USB2.0 full-speed device interface. 4 UARTs. One CAN interface (2.0B active). 2 IIC interfaces, 2 SPI interfaces. 37 I/O ports, can be mapped to 16 external interru