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- Manuals
- 2
- Models
- 1
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- EN · ZH
- Last added
- 2026-10-01
WCH models by category
Featured WCH manuals
WCH CH340 USB to Serial Chip Datasheet
The CH340 is a USB bus converter chip that can translate USB to standard serial, IrDA infrared, or printer interfaces. It supports full‑speed USB 2.0, a wide range of baud rates, and common modem control signals, making it suitable for upgrading legacy serial devices to USB.
The datasheet details the SSOP‑20 package, pin functions, absolute maximum ratings, electrical parameters, and example application circuits for USB‑to‑RS232, USB‑to‑TTL, and USB‑to‑infrared adapters. Design notes cover decoupling, crystal placement, and PCB layout recommendations.
Covers: Introduction · Features · Package · Pin Description · Function Description · Parameters
WCH CH32V20x/CH32V30x Datasheet
The CH32V20x/CH32V30x series are 32‑bit RISC‑V microcontrollers designed for industrial applications. They offer a range of flash and SRAM capacities, extensive peripheral sets, and low‑power modes.
The document provides detailed specifications, memory maps, clock tree diagrams, package options, and ordering information for models such as CH32V203, CH32V303, CH32V305, CH32V307 and CH32V208. This manual is written in Chinese.
Covers: Series Overview · Specifications · System Architecture · Memory Map · Clock Tree · Package and Ordering Information
Latest WCH manuals
WCH CH340 USB to Serial Chip Datasheet
Datasheet 6 pages · 144 KB · ENThe WCH CH340 datasheet provides specifications, pin descriptions, electrical parameters, and application examples for the USB‑to‑serial converter chip.
WCH CH32V20x/CH32V30x Datasheet
Datasheet 66 pages · 1.3 MB · ZHTechnical data sheet for WCH CH32V20x and CH32V30x industrial‑grade RISC‑V microcontrollers.
Which document do I need?
Datasheet
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in WCH manuals
What supply voltages does the CH340 support?
The CH340 can operate from either a 5 V or a 3.3 V source voltage.
Which modem control signals are available on the CH340?
It provides RTS, DTR, DCD, RI, DSR, and CTS signals.
What is the maximum CPU frequency of the CH32V series?
The CPU can run up to 144 MHz.
What operating voltage does the CH32V series require?
It operates at a nominal 3.3 V supply.