6 Hardware lock to disable USB mass storage device
You can lock the VTAP100 so that its firmware and configuration cannot be changed. You can
either do this in software, or simply disable the mass storage device in hardware. If you have a
boxed VTAP100-USB it is strongly recommended that you use the software lock option,
which is described in the VTAP Configuration Guide.
A software lock prevents changes but leaves some files visible. A hardware lock means that
the VTAP100 will no longer be detected as a USB mass storage device. (It will still behave as
an HID keyboard device and, if enabled, the virtual COM port will behave as a composite USB
device consisting of HID keyboard and USB virtual COM port.)
Users of a VTAP100-USB will need to open the wallbox to locate the jumper labelled LOCK
(close to the MicroUSB connector) on the PCB.
If you have a compact (CC) case you need to remove the screw from the case (which may be
either a security screw or phillips head screw).
Connect a jumper across LOCK on the PCB to lock the device, preventing firmware or
configuration changes via the mass storage device. (It may still be possible to update the
firmware or configuration via the command interfaces of the virtual COM port or serial ports,
if they are enabled.)
Figure 6-1 Jumper positions on VTAP100 PCB v4a hardware
When you start the VTAP100, the presence of this jumper means the connected PC will not
detect a USB mass storage device. The VTAP100 will only be detected by the PC as a
keyboard (or keyboard and virtual COM port).
At any time you can remove the jumper across LOCK. When you restart the VTAP100, it will
be detected as a USB mass storage device and you will be able to make firmware or
configuration changes again.
VTAP100-USB INSTALLATION GUIDE
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VTAP MOBILE WALLET READERS
