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USB To TTL Serial 5v/3.3v Alternative CH340G Module

AED 9.45

1

Description

ch340 is a USB bus conversion chip, it can realize USB to UART interface or USB to printer interface. In serial UART mode, ch340 provides a common MODEM liaison signal, used to expand the UART interface of a computer or upgrade the common serial device to the USB bus directly.

Features

  • Full speed USB device interface, compatible with USB V2.0.
  • Emulate standard UART interface, used to upgrade the serial peripherals, or expand the UART interface via the USB bus.
  • Original serial applications are totally compatible, without any modification in Windows operation system.
  • Hardware full duplex serial UART interface, built-in transmit-receive buffer, supports communication baud rate varies from 50bps to 2Mbps.
  • Supports common MODEM liaison signal RTS, DTR, DCD, RI, DSR, and CTS.
  • Through external level conversion chip provide further RS232, RS485, RS422 interface, etc.
  • ch340R supports IrDA criterion SIR infrared communication, supports baud rate varies from 2400bps to 115200bps.
  • Software compatible with ch341, use the driver of ch341 directly.
  • Support 5V and 3.3V power supply even 3V.
  • ch340Ehas built-in crystal, no external crystal

usb-to-uart-ch340e-3.jpg


STC microcontroller download mode:
1) wiring as follows: (only need to 3 wires)
TXD terminal of USB downloader-> connect single-chip microcomputer P3.0 (RX)
RXD end of USB downloader-> connect single-chip microcomputer P3.1 (TX)
GND end of USB downloader-> connect single-chip GND
2) the development board or small system separate power supply. After the cable, it will be found that even if the development board switch is turned off, the power indicator of the development board will be illuminated (dim). This is normal, or download the STC according to the serial port. Series MCU method download (power supply should be cold start once).
 
STM32 microcontroller download mode:
1) Wiring is as follows: (only need 3 wires)
TXD terminal of USB downloader-> connect single-chip microcomputer PA10 (RX1)
RXD end of USB downloader-> connect single-chip microcomputer PA9 (TX1)
GND end of USB downloader-> connect single-chip GND
2) The development board or small system is powered by a separate power source. Or use the USB downloader to supply 5 V power. In the download, you boot0 to VCC. After the download is complete, close it back to GND and press the reset button to complete the operation.

Support win7 32-bit, 64-bit operating system, support win xp operating system