1,The CH340 is a USB-to-serial port chip, which is mainly used for the conversion of USB-to-TTL serial port and the communication between USB and TTL serial port devices.
2. CH340 is a USB bus conversion chip, which implements USB to serial port, USB to IrDA infrared or USB to print port.
3, different. The CH340 is a USB bus conversion chip that implements USB to serial port, USB to IrDA infrared, or USB to print port. In serial port mode, the CH340 provides a MODEM for communicationSignal used to extend the asynchronous serial port for the computer.
4, no contradiction, CH340 is TTL level, can be directly connected with the TTL interface. The USB transfer outlet is also converted to output 232 level. If the CH430 passes MAX232, it can output TTL level.
5, 【CH340G】 is a USB bus conversion chip, to achieve USB to serial port, USB to IrDA infrared or USB to print port. In serial port mode, the CH340G provides common MODEM communication signals.It is used to extend asynchronous serial ports for computers, or to upgrade ordinary serial devices directly to the USB bus.
1, USB to serial port schematic is not an actual picture or fixed circuit diagram, but a design concept that describes how to convert USB signals into serial port signals. In the specific implementation, USB to serial port usually involves the combination of hardware and software. At the hardware level, you need to use the USB interface chip and the serial level conversion chip.
2, the principle of serial port to USB is to convert the traditional serial port (such as RS-23RS-485, etc.) signal into USB signal through the converter, so as to achieve the communication between the device and the computer. Specifically, the serial port to USB converter contains a USB interface controller and a serial interface controller.
3, serial port to usb is to convert the data of serial port communication into USB data through the protocol to send or receive, usb to serial port on the contrary is to convert USB data into serial port protocol to send or receive, although it looks the same, but the specific one is to use serial port chipOne is to use a USB chip.
1. However, if your goal is to use serial ports for data storage, the situation is different. USB is not simply equal to U disk, it is a communication protocol, U disk is the actual storage carrier under this protocol. The core of USB devices is data transfer, not file storage.
2, USB to serial port is to achieve the conversion between the computer USB interface and the universal serial port. A surnameA computer with a serial port provides fast access, and using a USB-to-serial device is equivalent to turning a traditional serial device into a plug and play USB device.
3, the so-called usb to serial port way, but in order to achieve usb communication and there is no usb interface corresponding to each other, one side only usb interface, one side only serial port, then consider using this conversion, in fact, in the use of the conversion of each other! (because both parties pass data to each other).
4, there is only one COM port outside the general motherboard, and the nine-hole output end (trapezoid) behind the chassis and parallel port,Is the COM1 port, COM2 port is generally from the motherboard pin out. The parallel mouth is the longest trapezoidal mouth. However, the current mainstream motherboard generally only has one serial port, or even does not, and will slowly be replaced by USB.
5, USB (Universal Serial Bus) interface can not only transmit data, but also provide power, support a variety of device connection, including printers, mice, keyboards and so on.
6, before installing the driver, be sure that your serial cable and USB interface are no problem. Install the USB serial port driver (for Windows 10