Item Type: USB Port Converter Module <br>Support Parallel Port: Support USB to printer parallel port and EPP or MEM parallel port <br>Support Serial Port: Support USB to UART, I2C, SPI interface <br>Output Voltage: Output voltage and level signal can choose 3.3V or 5V <br>Onboard UART and SPI or I2C working status indicator<br>1、SUPPORT SERIAL PORT AND PARALLEL PORT: CH341A conversion module is equipped with CH341A chip, which is a USB bus transmission chip. Providing asynchronous serial port, printing port, parallel port, and commonly used 2 wire and 4 wire synchronous serial ports through USB bus <br>2、WIDE APPLICATION: This module can be used for serial port expansion, I2C interface EEPROM and SPI interface FLASH, as well as for STC microcontroller programming, program debugging, data acquisition, etc. <br>3、SUPPORT PARALLEL PORT: Support USB to printer parallel port and EPP or MEM parallel port, very versatile and multiple function <br>4、SUPPORT SERIAL PORT: USB port converter module support USB to UART, I2C, SPI interface, useful and practical, provide great convenience <br>5、ONBOARD INDICATOR: Output voltage and level signal can choose 3.3V or 5V, onboard UART and SPI or I2C working status indicator1 x USB Port Converter Module