Full-speed USB device interface, compatible with USB V2.0, Standard USB-A male design;Direct power supply from USB connectin to PC.Analogue standard serial port, for upgrading serial peripherals, or increased additional serial port via USB. Support 3.3V and 5V TTL target system, the serial application is fully compatible with the computer under the Windows operating system, without need for modification;Support 5, 6, 7 or 8 data bits, to support odd parity, even parity, blank signs and no parity;Support the serial port to send control signal and MODEM liaison signal of transmission rate and serial receiver ready signal. Two parallel port interface way: EPP mode and MEM way; USB to parallel port can be used for simple digital I / O control;Support a variety of serial communication mode, UART, I2C, SPI, etc.;Support 2-wire and 4-wire synchronous serial interface, I2C support 4 kinds of transmission speed;Perfectly support STC MCU program download and debug, STC official recommended program. Support the outwards output voltage, optional 3.3V/ 5V or no output;Support working status indication;Dual interface output;Hardware full-duplex serial port, built-in transceiver buffer area, support the communication baud rate 50bps ~ 2Mbps;Support WINDOWS 98/ME/2000/XP/server 2003/VISTA/server 2008/WIN 7/64/32-bit. Application:Simulation standard serial ports, for upgrading serial peripherals, or increased via USB;Need I2C, SPI, UART, TTL serial port and other occasions;Electronic engineers debugging Downloads;Debugging of a variety of hardware systems, software systems, ;Serial ports flash. Single chip integrates multiple functions, all hardware implementation, can be complete. USB- more than I2C Master multiple rate adjustable, 20K 100K 400K 750K USB- more than SPI Master 2M rate, not adjustable USB- more than UART supports communication baud rate 50bps~2Mbps, unconventional baud rate can be configured USB- more than EPP/MEM parallel port Colour: Blue Material: PCB Package Contents: 1 * Parallel Converter Module Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.