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Description

The LC74789, LC74789M, and LC74789JM are onscreen display controller CMOS ICs that display characters and patterns on the TV screen under microprocessor control. These ICs support 12 ×18 dot characters and can display 12 lines by 24 characters of text.

Features

• Initial display positions: 64 horizontal positions and 64 vertical positions

• Blinking: Specifiable in character units

• Blinking types: Two periods supported: About 1.0 second and about 0.5 second

• Blanking: Over the whole font (12 x 18 dots)

• External control input: 8-bit serial input format

• On-chip sync separator circuit