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Principles of Operation Teledyne API - Model T200H/T200M Operation Manual
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8.7. FRONT PANEL/DISPLAY INTERFACE ELECTRONICS
Users can input data and receive information directly through the front panel touch-
screen display. The LCD display is controlled directly by the CPU board. The touch
screen is interfaced to the CPU by means of a touch screen controller that connects to
the CPU via the internal USB bus and emulates a computer mouse.
Figure 8-25: Front Panel and Display Interface Block Diagram
8.7.1. FRONT PANEL INTERFACE PCA
The front panel interface PCA controls the various functions of the display and touch
screen. For driving the display it provides connection between the CPU video controller
and the LCD display module. This PCA also contains:
power supply circuitry for the LCD display module
a USB hub that is used for communications with the touch screen controller and the
two front panel USB peripheral device ports
the circuitry for powering the display backlight
07270B DCN6512