Description

Product Basic Parameters:

1. PWR DSP: Power Indicator Light
2. VCC+5V: +5V Power Supply Derived from USB
3. CH340G VCC: CH340G Chip Power Supply Selection Point
   • Shorting Cap between 2 and 3: Module operates in 5V mode, TTL level is 5V, compatible for communication with 5V systems.
   • Shorting Cap between 3 and 4: Module operates in 3.3V mode, TTL level is 3.3V, compatible for communication with 3.3V systems.
4. VCC+3V3: Regulated +3.3V Power Supply Internal to the Module, for Module Use Only, Not for External Loads.
5. CH340G TXD: Serial Data Output
   • In case of communication issues, swap pins 5 and 6.
6. CH340G RXD: Serial Data Input (Note: The original text incorrectly labeled this as “output”; it has been corrected here.)
   • In case of communication issues, swap pins 5 and 6.
7. GND: Module Ground. When communicating with other systems, connect to the ground of the TTL serial port.
8. TXD DSP: Data Transmission Indicator Light. The brightness and flashing speed of this light are related to the communication baud rate, allowing observation of system status without instruments.
9. RXD DSP: Data Reception Indicator Light. The brightness and flashing speed of this light are related to the communication baud rate, allowing observation of system status without instruments.
10. Supported Operating Systems: Windows 98/ME/2000/XP/Server 2003/VISTA/Server 2008/Win7/Win8 (both 32-bit and 64-bit)
11. Module Dimensions: 55mm * 16mm, PCB Dimensions: 33mm * 16mm

Driver Download Link:

https://omaginetech.com/wp-content/uploads/2025/03/USB-to-TTL-CH340-Module-Upgrade-Daughterboard-STC-Microcontroller-Download-Cable-Flashing-Board-USB-to-Serial-Port.zip