You can use FT2232HL to convert from USB to multiple interfaces, such as UART/SPI/JTA/I2C, etc. Overall dimensions (length x width x height) : 103 x 45 x 14 mm; PCB size (length x width x thickness) : 95 x 45 x 1.6mm Power supply: +5V, which is connected to CN3 through USB square cable. All functional pins are drawn out, making it easy to use wire to connect peripheral modules. The signal pins of CN3 and CN4 are added with ESD protection circuit. [ description ] CN1:2.54mm spacing 1 x 20 Pin single needle CN2:2.54mm spacing 1 x 20 Pin single needle CN4:2.54mm spacing 2 x 10 Pin double needle simple Angle holder The spacing between CN1 and CN2 is 1400mil, that is, 14 x 2.54=35.56mm [simple usage steps] LED1 is the power on indicator light. After the power is supplied, it stays on. After installing drive CDM21228_Setup, FT2232HL defaults to USB to dual serial ports. Using PC serial debugging software can test these two serial ports. Just use two wires to connect the serial ports: ADBUS0 (TXD) and BDBUS1 (RXD) ADBUS1 (RXD) and BDBUS0 (TXD) U7 (74HC573) is connected to BDBUS for driving LED for signal indication. Some LED flashes are normal when the board is . When BDBUS is used as a serial port and opened, the red light in LED5 is always on, which is the indicator of hardware flow control, which is a normal phenomenon. The board 93LC56 EEPROM is not in use, so it is indicated as BLANK DEVICE. Condition: New Type: Drive IC Model Number: FT2232HL Supply Voltage: 5V Application: Computer color:As shown Material:plastic Package Contents: 1 x FT2232HL Development Board Kit Only the above package content, other products are not included. Note: Light 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.