Overview

Character and pattern display control IC for TV screen. A character dot configuration is 12 × 18. The IC has 64 internal character ROMs and displays up to 288 characters (24 characters × 12 lines) on a TV screen. It can be controlled by a microcontroller.

Function and Applications

• Screen Display Mode: 24 characters × 12 lines

• Number of display characters: 288 characters (max.)

• Display control ROM (line ROM):

64 lines (line control: 24-character line)

• Display RAM:

176 characters (used for specifying variable characters)

• Character configuration:

12 (horizontal) × 18 (vertical) dots

• Number of character types: 64 types

• Character size:

Horizontal direction: 4, Vertical direction: 4

• Display start position:

Horizontal direction: 64, Vertical direction: 64

• Blinking mode: Character blinking

• Display ON/OFF mode:

ON/OFF cycle; 1.0 second and 0.5 second. Duty cycle;

25, 50 and 75

• Blanking mode: Entire font area (12 × 18 dots)

• Background colors: 4 (at internal SYNC. operation mode)

• External control input: Serial data input

• Synchronous signal: Selectable: Internal and External

• Internal SYNC. separation circuit available.

• Video output: NTSC-format composite output

• Superimpose function:

Superimposes character output on composite video

output