ra8835 Topway Display, ra8835 Datasheet - Page 69

• Manufacturer Part Number: ra8835
• Description: Dot Matrix Lcd Controller
• Manufacturer: Topway Display

RAiO TECHNOLOGY INC.
Version 1.7
8-6 16 x 16-dot Graphic Display
8-5-3 Flashing Area
8-6-1 Command Usage
8-6-2 Kanji Character Display
and put one graph on each screen layer. The difference in contrast between the half- and full-
intensity displays will make it easy to distinguish between the two graphs and help create an
attractive display.
8-5-3-1 Small area
To flash selected characters, the MPU can alternately write the characters as character codes and
blank characters at intervals of 0.5 to 1.0 seconds.
8-5-3-1 Large area
Divide layer 1 and layer 2 into two screen blocks each, layer 2 being divided into the area to be
flashed and the remainder of the screen. Flash the layer 2 screen block at 2 Hz for the area to be
flashed and combine the layers using the OR function.
This example shows how to display 16 x 16-pixel characters. The command sequence is as
follows:
The program for writing large characters operates as follows:
1. OVLAY: P1 = 00H
2. DISP ON/OFF: P1 = 34H
CSRW
CSRDIR
MWRITE Write to the display memory.
1. The microprocessor reads the character data from its ROM.
2. The microprocessor sets the display address and writes to the VRAM. The flowchart is
shown in Figure 8-13.
ABC
Set the cursor address.
Set the cursor auto-increment direction.
Figure 8-10: Localized Flashing
XYZ
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ABC
XYZ
Dot Matrix LCD Controller
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RA8835