Oct 8, 2021 · CH340 is a popular IC that is a bidirectional USB to Serial converter IC, used to convert USB signals into UART, which can be used to communicate with microcontrollers.

The CH340G is a low-cost alternative to FTDI and CP2102 USB-to-serial converters. It is used in many Arduino clones and ESP8266/ESP32 boards to provide USB-to-UART functionality. Works with Windows, macOS, and Linux (may require drivers on some systems).

DTR# pin of CH340G/C/T/K is used as a configuration input pin before the USB configuration completion. An external 4.7KΩ pull-down resistor can be connected with this pin to generate default low during USB enumeration, to apply larger supply current from USB bus via the configuration descriptor.

Sep 30, 2020 · CH340G：CH340G provides a full 9-wire serial port without a built-in crystal oscillator. Pin 1：The common terminal is grounded and directly connected to the ground wire of the USB bus. Pin 2：Serial data output. Pin 3：Serial data input, built-in controllable pull-up and pull-down resistors.

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 …

CH340 is a USB bus converter chip which converts USB to serial port or printer port. In UART mode, CH340 provides standard MODEM signals, used to extend serial port for computers, or upgrade directly from normal serial device to USB bus. For more information about converting USB to printer interface, please refer to the CH340DS2 datasheet.

The CH340G is a USB-to-serial UART interface chip commonly used for converting USB signals to serial UART signals, and vice versa. It is often utilized in microcontroller-based projects, especially those that require USB connectivity for communication with a computer.

CH340 has integrated USB pull-up resistor, UD+ and UD- pins should be connected to USB bus directly. CH340 has integrated power-on reset circuit. CH340B also provides low active external reset pin. CH340G/CH340T/CH340R need to work with 12MHz clock signal supplied to XI pin.

The DTR# pin of CH340 is used as a configuration input pin before the USB configuration is complete. An external 4.7KΩ pull-down resistor can be connected with this pin to generate default low level during USB

Apr 6, 2023 · CH340 is a USB bus convert chip and it can realize USB convert to serial interface, USB convert to IrDA infrared or USB convert to printer interface. In serial interface mode, CH340 supplies common MODEM liaison signal, used to enlarge asynchronous serial interface of computer or upgrade the common serial device to USBbus directly.