Overview
The LC74784 and LC74784M are on-screen display CMOS LSIs that display characters and patterns on a TV screen under microprocessor control. The LC74784 and LC74784M display up to 12 lines of 24 characters, each in a 12 Ã 18 dot matrix.
Features
⢠Display structure: 12 lines à 24 characters (up to
288 characters)
⢠Character structure: 12 (horizontal) à 18 (vertical) dots
⢠Character sizes: Three size settings each in the vertical
and horizontal directions
⢠Character set: 256 characters
⢠Display start position: 64 position settings each in the
vertical and horizontal directions
⢠Blinking: In individual character units
⢠Blinking types: Two types with periods of about 0.5 and
1.0 second
⢠Blanking: Whole font area blanking (12 à 18 dots)
⢠Background colors: 8 colors (in internal synchronization
mode): 4fSC (NTSC/PAL/PAL-M/
PAL-N)
Background colors: 4 colors (in internal synchronization
mode): 2fSC (NTSC)
Background colors: 1 color (blue) (in internal
synchronization mode): 2fSC
(PAL/PAL-M/PAL-N)
⢠External control input: 8-bit serial input format
⢠Built-in sync separator circuit
⢠Character blanked data output
⢠Video output: Compound NTSC, PAL, PAL-N and
PAL-M output
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