USB to RS485 Serial module Converter
Internal Chip:CH340
LED Light prompts TXD and RXD Singnals
Typical Applications
• USB to serial RS485 level converter.
• Upgrading legacy peripherals to USB.
• Interface Microcontroller UART or I/O to USB.
• Interface FPGA or PLD to USB.
• USB Instrumentation PC interface.
• USB industrial control.
• USB password protected file transfers.
Note: The first time use the USB to RS485 adapter on your PC ,your must install VCP dirver,For the driver download and install ,please peference links:
https://www.wch-ic.com/search?spm=a2g0o.detail.1000023.1.6520cSj7cSj7dE&t=all&q=CH340
The CH340 Chip Features
1. Full-speed USB device interface, USB 2.0 compatible.
2. Emulate standard UART interface, used to upgrade the original serial peripheral or expand additional UART via USB.
3. Original UART applications are totally compatible without any modification in Windows operating systems.
4. Hardware full duplex UART interface, integrated transmit-receive buffer, supports communication baud rate varies from 50bps to 2Mbps.
5. Supports common MODEM interface signals RTS, DTR, DCD, RI, DSR and CTS.
6. Provides further RS232, RS485, RS422 interface, etc. through external voltage conversion chip.
7. CH340R supports IrDA criterion SIR infrared communication, supports baud rate varies from 2400bps to 115200bps.
8. Built-in firmware, software compatible with CH341, use VCP driver of CH341 directly.
9. Supports 5V and 3.3V power supply voltages.
10. CH340C/N/K/E/X/B have integrated clock, no external crystal required, CH340B also integrates EEPROM used to configure the serial number, etc.
11. RoHS compliant SOP-16, SOP-8, SSOP-20 and ESSOP-10, MSOP-10 lead-free package.
