LC74785 Description
EN5520A CMOS LSI LC74785, LC74785M On-Screen Display Controller LSI Overview The LC74785 and LC74785M are on-chip EDS CMOS LSIs for on-screen display, a function that displays characters and patterns on a TV screen under microprocessor control. These LSIs support 12 × 18 dot characters and can display 12 lines by 24 characters of text.
LC74785 Key Features
- Display format: 24 characters by 12 rows (Up to 288 characters)
- Character format: 12 (horizontal) × 18 (vertical) dots
- Character sizes: Three sizes each in the horizontal and vertical directions
- Characters in font: 128
- 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 × 18 dots)
- Background color
- Background coloring: 8 colors (internal synchronization mode): 4fsc