The CH32V003F4U6 is a MCU in the QFN20 package by WCH and features 48 MHz clock frequency, 16KB of FLASH and 2KB of RAM. It will be shipped in a bag with the cut tape in it.

The following information about the MCU is from the official WCH website

System Block Diagram

Summary

CH32V003 series is based on QingKe RISC-V2A core design of industrial-grade general-purpose microcontroller, support 48MHz system main frequency, with wide voltage, 1-wire serial debug interface, 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 op-amp comparators, multiple timers and standard communication interfaces USART, I2C, SPI, etc.

Features

• QingKe 32-bit RISC-V2A processor, supporting 2 levels of interrupt nesting
• Maximum 48MHz system main frequency 2KB SRAM, 16KB Flash
• Power supply voltage: 3.3/5V
• Multiple low-power modes: Sleep, Standby
• Power on/off reset, programmable voltage detector
• 1 group of 1-channel general-purpose DMA controller
• 1 group of op-amp comparator
• 1 group of 10-bit ADC
• 1×16-bit advanced-control timer, 1×16-bit general-purpose timer
• 2 WDOG, 1×32-bit SysTick
• 1 USART interface, 1 group of I2C 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)

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