This is a USB-to-Serial module that uses an FTDI FT4232L chip to convert a USB Host signal to four TTL serial ports. Each is a five-wire serial port.
The serial ports are broken out to 2×5-pin headers with 0.1" (2.54mm) spacing, making them easy to work with for prototyping, and also compatible with FC10P ribbon cables.
The pinouts of the serial ports are as follows:
|Pin ||J4 ||J2 ||J3 ||J5 ||Description |
|1 ||NC ||NC ||NC ||NC ||Not connected |
|2 ||RXD0 ||RXD1 ||RXD2 ||RXD3 ||UART serial data in |
|3 ||TXD0 ||TXD1 ||TXD2 ||TXD3 ||UART serial data out |
|4 ||NC ||NC ||NC ||NC ||Not connected |
|5 ||GND ||GND ||GND ||GND ||GND |
|6 ||NC ||NC ||NC ||NC ||Not connected |
|7 ||DEN0 ||DEN1 ||DEN2 ||DEN3 ||UART request to send |
|8 ||CTS ||CTS ||CTS ||CTS ||UART clear to send |
|9 ||VDD5 ||VDD5 ||VDD5 ||VDD5 ||5V |
|10 ||VDD33 ||VDD33 ||VDD33 ||VDD33 ||VDD 3.3V |
As well as from the mini-USB connector, the USB signals can be brought in through the SIP connector behind it. The pins have 2.54mm pitch and are in the order VDD5V, USB+, USB-, GND.