Overview
The LC74711 is a CMOS LSI for applications involving microcomputer control of on-screen character and graphics displays. Built-in character ROM supplies 128 alphanumerics and each character is generated in a 12 by 18 pixel format. The display is capable of supporting a maximum of 288 characters within a 24 characters by 12 line array.

Functions and Applications
(1) Screen construction: 24 characters X 12 lines
(2) Number of characters displayed: Maximum 288 characters capacity
(3) Display control ROM (line ROM): 64 lines (line unit control: 24 character construction)
(4) Display RAM: 176 characters (supporting extended character selection)
(5) Character construction: 12 (horizontal) X 18 (vertical) pixels
(6) Character set: 128 types of characters
(7) Character size: 4 horizontal types and 4 vertical types
(8) Display starting position: 64 types horizontally and 64 types vertically
(9) Blinking: Character units
(10) Blinking types: 2 types with approximate 1.0 s and 0.5 s cycles and 3-type selection for 25%, 50% and 75% duty
(11) Blanking: Font complete blanking (12 X 18 pixels)
(12) Background color: 8 background tints (during internal synchronizing operation: 4 fsc when using crystal oscillator)
(13) External control input: Serial data input
(14) Synchronizing signal: Internal synchronizing, supports external synchronizing changeover
(15) Built-in synchronizing separator circuit
(16) Video output: NTSC system composite video output
(17) Superimpose: Characters superimposed over composite video output
(18) Package: DIP-22S