LC74794
LC74794 is On-Screen Display Controller LSI manufactured by SANYO.
Ordering number : EN- 5557
CMOS LSI
LC74794, 74794M
On-Screen Display Controller LSI
Preliminary Overview
The LC74794 and LC74794M are CMOS LSIs for onscreen display, a function that displays characters and patterns on a TV screen under microprocessor control. They feature a built-in PDC/VPS/UDT interface circuit. These LSIs support 12 × 18 dot characters and can display 12 lines by 24 characters of text.
Package Dimensions unit: mm 3196-DIP30SD
[LC74794]
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: 1.0 second and 0.5 second
- Blanking: Over the whole font (12 × 18 dots)
- Background color
- Background coloring: 8 colors (internal synchronization mode): 4fsc
- Background coloring: 6 colors (internal synchronization mode): 2fsc
- Blue background only: NTSC
- Line background color
- Can be set for 3 lines
- Line background coloring: 8 colors (internal synchronization mode): 4fsc
- Line background coloring: 6 colors (internal synchronization mode): 2fsc
- External control input: 8-bit serial input format
- On-chip sync separator and AFC circuits
- PDC/VPS/UDT interface circuit
- posite video output in the PAL or NTSC format
SANYO: DIP30SD unit: mm...
