Overview

The LC74770M is a CMOS LSI that implements on-screen display, a function that displays characters and patterns on display screens such as camcorder viewfinder screens under microprocessor control. This LSI displays 12-dot by 18-dot characters.

Features

• Display format: 24 characters by 12 rows (up to 288 characters)

• Characters displayed: Up to 288 characters

• Character format: 12 (horizontal) × 18 (vertical)

• Characters in font: 128

• Character sizes: Normal and double

• Initial display positions: 64 horizontal positions and 64 vertical positions

• Reverse video function: Characters can be displayed in reverse video specified in units of individual characters.

• Blinking types: In character units in one of two periods, 1.0 second and 0.5 second, with a 50 duty.

• Outputs: Character and blanking data, with two output systems for each

• External control input: 8-bit serial input format

• General-purpose output port: 4 bits (controlled from the serial input data)