Product Features:

• Uses PL2303hx
• Supports Windows 8
• Supports three power modes: 5V external power supply; 3.3V external power supply; externally powered (requires 3.3V-5V)
• With 3 LED: TXD LED, RXD LED, POWER LED

Applications:

• RS-232 to USB upgrade traditional devices
• USB to RS-232 serial adapter

Instructions for use: (to access the MCU for example)

• VCCIO: Output 3.3V or 5V (USB-powered module jump, jumper shall 3.3V or 5V)
• GND: GND connection
• TXD: pick MCU.RX (signal flow: MCU.RX << PL2303 << PC.TX)
• RXD: pick MCU.TX (signal flow: MCU.TX >> PL2303 >> PC.RX)