Matrix Orbital LK204-24-USB - Manual (Page 11)

Figure 5: Jumpers 1 and 2
The display can be powered by the USB port or by external power. Soldering Jumper 1, and removing
Jumper 2 will allow for power to be supplied externally. The advantage to this is the display will power up
right away, allowing fans to start, for example, without waiting for the OS to power the display. In addition,
if the advanced GPOs are set to the +5V position power will be drawn from external power rather than the
USB port, thus allowing higher current draw.
NOTE Jumpers 1 and 2 are ON from factory.
2.1.3 USB Communications
A standard B type USB header is provided on the display for USB communication. The USB cable pro-
vides power and data to the display. There are two ways of communicating to the display. Under Windows,
the user will have direct access to the display drivers or create a virtual COM Port (VCP). With the VCP,
a new COM Port gets created in Windows. Under the control panel the user can set all the options for the
USB device, including speed. Windows 98, Windows ME, Windows 2000, and Windows XP drivers have
been tested and work. VCP drivers are also available for Apple OS-X, OS-8, and OS-9. Linux drivers are
available as well, but have not been tested by us, nor will Matrix Orbital be able to provide any support for
them.
For more information please visit
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8bit, no parity, one stop bit.
Speed: 19.2 Kb/s.
Table 5: USB ID
VID 0403
PID Description
FA00 USB 2 Serial Communication
FA01 MX2 / MX3
FA02 MX4 / MX5
FA03 LK / VK202-24-USB
FA04 LK / VK204-24-USB
Matrix Orbital LK204-24-USB 7