Functional Details
Communication Interfaces
Rev. 1
SmartHub Underdash OBC Hardware Guide
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Debug Serial Port (COM7)
The SmartHub Underdash OBC supports EIA-RS232 level serial communication port for Co-Processor
debugging purposes. The port supports a baud rate of 300 to 115,200bps, and provides the TX and RX
signals only.
USB Communication
The SmartHub Underdash OBC supports two USB ports (Universal Serial Bus), one USB Host port for
external device/peripheral connections, the second USB is a USB Client.
USB Host
The USB Host Port connects to the main device connector. This port supports the USB2.0 low, full, and
high-speed communications standards.
NOTE:
The USB Host port provides up to 500 mA of power consumption for non-self-powered
client devices.
The USB Host interface supports the following profiles:
USB Standard HID
USB Printer (PCL)
USB Storage
For more information about these interface signals please see the
USB Client
The USB Client interface supports Android ADB for application development, device configuration and
management, and for application debugging.
Peripheral Controls
Analog and Digital Input lines
The SmartHub Underdash OBC provides seven automotive input lines (0-32V). The input lines can be
configured as digital or analog lines.
IGN (automotive voltage level) is for monitoring the ignition switch signal. The other inputs can be used
for any purpose, like sensing door opening, sensing bus amber lights, etc.
The input signals are provided on the main 44 pins connector and on the DVI connector.
