Overview

The LC74775/M is an on-screen display controller CMOS IC that displays characters and patterns on the TV screen under microprocessor control. This IC includes a built-in PDC/VPS/UDT interface circuit.

Functions

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

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

• Character sizes: Three sizes each in the horizontal and vertical directions

• Characters in font: 128 (Of the 128 characters, one is a space character (7E hexadecimal) and one is a transparent space character (7F hexadecimal))

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

• Blinking: Specifiable in character units

• Blinking types: Two periods supported: 1.0 second and 0.5 second

• Blanking: Over the whole font (12 × 18 dots)

• Background color: 8 colors (internal synchronization mode): 4fSC and 2fSC Blue background only: NTSC

• Line background color: Three lines can be set up. 8 line background colors (in internal synchronization mode): 4fSC and 2fSC

• External control input: 8-bit serial input format

• On-chip sync separator circuit

• Video outputs: PAL and NTSC format composite video outputs

• On-chip PDC/VPS/UDT interface circuit supporting I2C

• Package: DIP30SD

MFP30S