Technalogix TAU-100, Manual

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VI-5
Display Components
The display section of the Series II-H PCB is comprised of the LCD and the components that make
up the data bus to 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. Firstly, 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.