BeagleBone/BeagleBone Black I/O Expansion Cape

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TITAN’s USB-2COM-BB is a plug-in RS-232 cape designed for the developers and users of BeagleBone and BeagleBone Black. The USB-2COM-BB BeagleBone RS-232 cape provides two high-speed RS-232 serial interfaces, two high-efficient USB 2.0 ports and one MicroSD card reader. The two RS-232 ports are located to the side of the cape with two 90-degree 10-pin connectors. Two IDC flat ribbon cables with D-Sub 9-pin male serial connectors are provided with the cape to connect the two 10-pin serial connectors. The flat ribbon cable provides the convenience for extended connection of serial devices. This dual RS-232 cape is designed to allow any other capes to be stacked above it without interference mechanically. When there is a need to add four serial ports, user can just stack two USB-2COM-BB modules over BeagleBone and BeagleBone Black.

When the USB-2COM-BB plugged to the USB port of BeagleBone or BeagleBone Black, the two serial ports, two USB ports and the Micro SD card reader are automatically detected and installed. The USB-2COM-BB board is designed with GL852G USB2.0 MTT Hub controller to expand the single USB port on BeagleBone Black and BeagleBone to two USB 2.0 ports for USB connection.

The USB-2COM-BB cape is a high-speed dual RS-232 ports/ dual USB ports /Micro SD reader cape that provides to BeagleBone Black and BeagleBone’s developers a cost-effective expansion I/O module to add two serial ports, two USB ports and one MicroSD card reader for their development.


  • Fully compatible with BeagleBone Black or BeagleBone platform
  • Adds two high speed RS-232 serial ports via USB connection
  • Each serial port provided 384bytes receive buffer and 128 bytes transmit buffer for high speed data throughput
  • Each serial port communication data rates up to 1Mbps
  • Connector: two DB9 male connectors via IDC flat ribbon cable
  • RS-232 data signals: DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
  • Two downstream USB2.0 ports with overcurrent protection
  • Each downstream USB port supports 5V 500mA power for external high power USB devices
  • Individual port power management
  • Supports USB1.1 and USB2.0 transfer speeds from 1.5Mbps to 480Mbps with automatic link and speed detection
  • Plug-and-play, no software or drivers required
  • Supports SD specifications v1.0/v1.1/v2.0/SDHC, up to 32GB
  • Compatible with SDXC, Up to 2TB
  • MicroSD card reader with 480Mbps USB2.0 transfer speeds
  • CE, FCC approval


USB2.0 Port
Port StatusFour
Power ModeSelf-power mode
Output Voltage (per port)+5VDC
Output Current(per port)500mA maximum
MicroSD Card Reader
Speed480Mbps USB2.0 transfer speed
Supported Memory CardsMicroSD/SDHC/SDXC
Serial Port
Serial Ports2
RS-232 SignalsDCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
Maximum BitratesData transfer rates from 300 baud to 1 Mbaud
Serial ConfigurationData bits: 7, 8
Parity: None, Odd, Even, Mark, Space
Stop bits: 1, 2
UART FIFO Buffer SizeEach port has 128 bytes FIFO for transmit and 384 bytes FIFO for receive
Operating Temperature0°C to 70°C
Storage Temperature-40°C to 85°C
Humidity0 to 90% RH. Noncondensing
Safety ApprovalsCE, FCC
HousingBoard only
Dimensions80mm × 55mm × 20mm (L × W × H)


Product Manual