Blackhawk USB560v2 Operating Mode Details and Instructions
January 2014
EWA Technologies, Inc.
Page 4 of 9
Safe Mode
The USB560v2 is running an embedded version of the Linux operating system. Safe mode is a protected
version of Linux the runs from a different location than normal mode. It is a safeguard in case the
USB560v2 cannot boot into normal mode. It is also used to update the USB560v2 with new application
firmware when necessary.
Corrupted flash, for example, may prevent the USB560v2 from booting into normal mode. While rare,
this could be caused by ESD, ground loops, or electrical surges during power up or power down. Placing
the USB560v2 into safe mode can allow end users to fix the corrupt flash.
Safe mode can also be entered when the USB560v2 is powered on 10 or more times without completing
the boot process. This is covered in more detail in the section, “
Placing the USB560v2 into Safe Mode
”.
Safe mode can be detected upon power up and during the 20 second boot period when the MODE LED
is solid red. Once the boot process has completed the MODE LED will blink red on and off (see Figure 2).
Figure 2 - Safe Mode LED States
Unknown Mode
While the USB560v2 has two modes, it is possible for the device to enter an unknown mode. Should this
happen, it is recommended that you contact Blackhawk technical support or try to take the steps to
place the unit into safe mode and update the unit’s firmware.
