FTDI Chip USB Expansion Add On Board for Raspberry Pi

The HUB Interface Expansion Module for the Raspberry Pi is ideal if you want to expand the number of downstream port interfaces on your Pi board.

What does the HUB Interface Expansion Module feature?
•Dual Channel USB/UART/245FIFO/SPI/I²C/JTAG/GPIO interface converter
•USB 2.0 hub chip with 3 downstream USB ports. (2 via a dual connector and 1 via the DIL connector pins).
•FT2232H bridge chip handles all USB signalling and protocols and has 2 interfaces that can be configured for asynchronous/synchronous serial communication or Parallel FIFO interface
•GL850G hub controller with 4 downstream USB ports

Other Key Features & Benefits
•USB type A plug
•External power input connector
•Support for USB suspend and resume
•Defaults to 2 independent UART interfaces
•300 baud to 12 Mbaud UART data transfer rates at 3.3 V TTL levels
•Multi-Protocol Synchronous Serial Engine (MPSSE) data rates of up to 30 Mbps on JTAG, SPI and I²C
•Green/red status LED for downstream USB port 1 & 2
•LED indicating power supply to external downstream ports
•On-board EEPROM 93LC56 for FT2232H configuration
•UHCI/OHCI/EHCI host controller compatible