Overview

The LC74761 and LC74761M are on-screen display CMOS LSIs that superimpose text and low-level graphics onto a TV screen (video signal) under microcontroller. The display characters have a 12 by 18 dots structure, and 256 characters are provided.

Features

• Display structure: 12 lines by 24 characters (up to 288 characters)

• Maximum character display: Up to 288 characters

• Character configuration: 12 (W) by 18 (H) dots structure

• Number of characters: 256 characters (254 plus space 1 font and transparent space 1 font)

• Character sizes: Three sizes (normal, double, and triple sizes)

• Display starting positions: 64 horizontal and 64 vertical locations

• Reverse video function: Characters can be inverted on a per character basis.

• Flashing types: Two types with periods of 0.5 and 1.0 second on a per character basis (duty fixed at 50)

• Background color: One of eight colors (when internal synchronization used)

• External control input: Serial data input in 8-bit units

• Built-in horizontal/vertical sync separation circuit, AFC circuit, and synchronization detector

• Video output: Composite video signal output in NTSC, PAL, PAL-M, PAL-N, PAL60, NTSC4.43, or SECAM format