Matrix Orbital GTT480272A, Hardware Manual

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4.5 Common Features
4.5.1 Mass Storage Mini USB Connector
Figure 14: Mass Storage USB Connector
Table 7: Mass Storage USB Pinout
Pin Function
1 Vcc
2 D-
3 D+
5 Gnd
The GTT480272A comes with a secondary Mini USB connector to access the SD memory card as a mass
storage device for easier access to the files contained on the card. The mass storage jumper must be
placed to use this function, please refer to the Mass Storage Mode section for further information.
4.5.2 SD Memory Card
The SD Memory Card is used to store all user fonts, bitmaps, 9-slices, animations and start-up settings.
The start-up settings are stored in a binary file called AUTOEXEC. This file contains a simple stream of
characters stored just as they would be if they were sent to the display at runtime, this will store all the
commands to change the initial settings for your application. Start-up settings are stored in this location
alone; therefore, simply removing the AUTOEXEC file will restore the display to factory defaults.
Please refer to the Protocol Manual at http://www.matrixorbital.ca/manuals/GTT Series/ for a complete
list of available commands executable not only at start up but runtime as well.
4.5.3 Mass Storage Mode
With a jumper placed on the mass storage side of the mode selector, the unit will power up in mass
storage mode. Placing a jumper on the USB mass storage header labelled ”A”, the unit will appear to any
PC as a mass storage device, giving you access to the contents of the SD memory card directly.
Please note, the speed of data transfers in mass storage mode is limited, and is only intended to be used
in situations where an external SD memory card reader is not available.
4.5.4 Field Upgrade
After release, Matrix Orbital may publish updates to the GTT code base or functionality that can be easily
applied to the unit in the field. While in Mass Storage Mode replace all of the files in the GTT upgrade
folder with the latest package available from
www.matrixorbital.ca/software/GTT/ . Then, cycle power to
the unit, wait for the upgrade to complete, and allow the screen to reboot. Finally, replace the GTT in
your application and enjoy the new additions to the display you’ve come to know and love.