Drivers support for Windows/Linux/Android/Mac, etc. Used to distribute to user with the product.ĬH341 datasheet, USB bus converter chip with multiple communication interfaces, such as USB to serial port/parallel port/printer port/I2C interface etc. The USB transceiver of CH340 is designed according to the built-in design of USB2.0, and it is recommended that no external resistor is in series with UD+ and UD- pins.ĬH340/CH341 USB to serial port One-Key installation VCP vendor driver for Windows, supports Windows 11/10/8.1/8/7/VISTA/XP/2000/98,Server 2022/2019/2016/2012/2008/2003 -32/64bit, Microsoft WHQL/HCK Certified, supports USB to 3-line and 9-line serial port. The EPAD of CH340K is 0# pin (GND), which is an optional connection the 3# pin (GND) is the necessary connection.ĬH340X is improved based on CH340E, with 5V tolerant characteristic added when the power supply is 3.3V.Ħ# pin of CH340X can be changed from TNOW to DTR# when an external resistor is connected, see Section 5.3 for the two configurations.ĬH340C whose batch number begins with 4 and last 3-digit greater than B40, 8# pin can be changed to DTR# when a 4.7KΩ pull-down resistor is connected.ĬH340R provides reverse polarity TXD and MODEM interface signals, discontinued.
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