LC74731W Overview
ENN 6526 CMOS IC LC74731W,74732W On-Screen Display Controller Preliminary Overview The LC74731W and LC74732W are on-screen display CMOS ICs that display characters and patterns on a TV screen under the control of a microcontroller. These ICs display 16 × 16-dot characters and up to 12 lines of text with 24 characters per line. Eight colors in character units (in internal synchronization mode):.
LC74731W Key Features
- Text structure: 12 lines × 24 characters (Up to 288 characters)
- Character format: 16 × 16 dots Character display clock frequency: about 9 MHz
- Character sizes: Four sizes each in the horizontal and vertical directions with the size set in line units
- Display start positions: 128 positions each in the horizontal and vertical directions
- Blinking, reverse video, reversed blinking, and character outlining: May be specified in individual character units
- Blinking types: Two types with periods of about 1.0 and about 0.5 seconds
- Blanking: The whole font area (16 ×16 dots) can be blanked in line units (Four types: no blanking, character size blanki
- Line spacing control: Zero to seven scan lines, in line units
