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2.10 USB Port
There is one USB 2.0 host port with a USB-A type socket. The router supports USB Mass
Storages and FTDI serial converters. For guidance on how to address an unsupported FTDI
chip, refer to the
Commands and Scripts
Use Unsupported FTDI Chip.
The USB port is designed to disable on overload to prevent potential damage (occurs when a
connected device draws excessive current). The port is re-enabled after the router is rebooted.
Mounting USB Flash Drive to the System
To access a USB flash drive in the router's system, it must be mounted. Follow these steps
to mount the drive:
• Use the dmesg command to view the list of recently connected devices.
• Identify the entry for the USB flash drive in the command's output, for example:
sda: sda1
• To mount the drive to the mnt directory, use the mount command:
mount /dev/sda1 /mnt
For more information about the commands for creating, mounting, checking, and unmounting
a file system on a USB Flash Drive, consult the application note for the
USB Socket Pinouts
The USB socket pinouts are described in Figure
Pin
Signal mark
1
+5 V
2
USB data -
3
USB data +
4
GND
application note, specifically the chapter on How to
Figure 21: USB Connector Pinout
Description
Positive pole of 5 V DC supply voltage, 0.5 A
USB data signal – negative pole
USB data signal – positive pole
Negative pole of DC supply voltage
Table 12: USB Connector Pinout
24
ICR-4461
Ext4_tools
21
and Table 12.
Data flow direction
Input/Output
Input/Output
router app.
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