CH340C.pdf

CH340 is a USB bus adapter chip, which realizes USB to serial port or USB to printer port.

          In the serial port mode, CH340 provides common MODEM communication signals, which are used to expand the asynchronous serial port for the computer, or directly upgrade the common serial device to the USB bus. Please refer to the manual (2) CH340DS2 for the description of the USB transfer port.

characteristic

• Full-speed USB device interface, compatible with USB V2.0.

• Standard USB printer port, used to upgrade the original parallel printer, compatible with relevant USB specifications.

• Compatible with Windows operating system, no driver is required under Windows 2000 and above systems, and the application programs are fully compatible.

• Support bidirectional communication of IEEE-1284 standard, support unidirectional and bidirectional transmission printers.

• Since it is a printer port converted through USB, it can only be compatible with the application layer, but not absolutely the same.

• The software is compatible with CH341 and can directly use the driver program of CH341.

• Supports 5V supply voltage and 3.3V supply voltage or even 3V supply voltage.

• CH340H has a built-in clock and does not need an external crystal oscillator.

• Available in SOP-28 lead-free package, RoHS compliant, pin compatible with CH341