Image CH340G
型号: CH340G
厂商: Chenmko Enterprise Co. Ltd. Chenmko Enterprise Co. Ltd.
分类: 嵌入式解决方案数据转换模块
描述: usb2.0 to uart/irda/lpt
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DreamCity Innovations  
WCH CH340G Datasheet  
WCH CH340 Series USB Interface Integrated Circuit  
CH340G USB to UART Interface  
Datasheet  
WCH Version 1E  
DreamCity Version 1.0  
Disclaimer from DreamCity Innovations  
This is a third-party translation of WCH’s CH340 Series chipset’s Chinese datasheet, with  
information regarding CH340G chip extracted. The two other chips sharing the same  
datasheet, CH340R and C340T, have official English version.  
1. Overview  
CH340 is a series of USB bus adapters, that provides serial, parallel or IrDA interfaces over  
the USB bus (note: CH340G supports serial interface only). The CH340G integrate circuit  
provides common MODEM signals to allow adding a UART to a computer, or converting  
existing UART devices to USB interface.  
2. Features  
Full-speed USB interface, compatible with USB 2.0 interface.  
Operates with a minimum amount of external components: a crystal and a minimum of four  
capacitors.  
Provides a virtual serial port for upgrading existing serial port devices or adding serial ports  
to a PC.  
Supports all existing applications using serial ports without the need of changing existing  
code.  
Hardware full-duplex serial interface with internal FIFO. Baud rate range from 50bps to  
2Mbps.  
Supports common flow control signals RTS, DTR, DCD, RI, DSR and CTS.  
Supports RS232, RS422 and RS485 with external level shifting components.  
Uses CH341 driver.  
Supports 5V and 3.3V operation.  
RoHS-compliant narrow body SO-16 package.  
DreamCity Innovations  
Page 1 of 6  
WCH CH340G Datasheet  

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