LC74723 Overview
EN4841C CMOS LSI LC74723, 74723M On-Screen Display Controller Overview The LC74723 and LC74723M are on-screen display controller CMOS LSIs that display characters and patterns on a TV screen under microprocessor control. Characters are 8 × 8 dots, and a dot interpolation function is provided. The LC74723 can display 24 characters × 10 lines of text.
LC74723 Key Features
- Screen structure: 24 characters × 10 lines (up to 240 characters)
- Character structure: 8 (horizontal) × 8 (vertical) (interpolation function supported)
- Character sizes: Two horizontal and two vertical sizes
- Number of characters: 64
- Display start position: 64 horizontal and 64 vertical positions
- Blinking: In character units
- Blinking types: Two, with periods of 0.5 and 1.0 seconds
- Blue background screen display: (in internal synchronization mode)
- External control inputs: 8-bit serial input interface
- Built-in sync separator circuit