LC74794M

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 Composite video output in the PAL or NTSC format ...