Technalogix TAV-1000, Manual

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VI-5
Display Components
The display section of the Series IIH PCB is comprised of the LCD and the components that make up the
data bus which send the data from the microcontroller to the LCD.
Specifically, the LCD is an alphanumeric 20X4 display that uses the industry standard 44780 controller and
a parallel interface for data communications. The microcontroller sends out the data to be displayed via a
serial bus, where the signals are latched with U11 and U12 and converted to a parallel data stream. The
parallel data then transfers directly to the LCD through connector J8. J8 also carriers the power supply for
the LCD.