User`s manual

OP710032
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 Hardware
Coordinate Systems
Figure 3-8 shows the coordinate systems for the touchscreen and the LCD.
Figure 3-8. Coordinate Systems
(row, column)
LCD Controller Chip
The LCD controller chip provides support for the LCD module. The
controller chip is attached to the data bus on the OP7100, and is mapped to
the I/O address space. This interface is composed of eight data bits, one
address line, and three control lines (RD, WR, and 1335-CS).
The interface from the LCD controller to the LCD module is unidirectional.
Data flow from the controller chip to the LCD module. A number of control
lines are provided for this function, but not all of them are used for a particu-
lar LCD module. The controller continually reads the SRAM for data
placed there by the microprocessor, and refreshes the display periodically.
landscape
0,7
7,0
7,7
0,0
landscape
320,240
0,0
320,0
0,240
portrait
7,7
0,7
7,0 0,0
portrait
240,0
0,320
0,0
240,320
Touchscreen
LCD