The MB90050 is an on-screen display controller for displaying text and graphics on the TV screen. The MB90050 controls a display area of 35 characters by 16 lines, and provides each character composed of 24 × 32 dots at most. The display functions include a wealth of characters with qualifying functions such as character background shading (shadow casting) , sprite character functions and graphic character functions, contributing to the use of control GUI displays.
The MB90050 is a CMOS on-screen display controller designed for displaying text and graphics on TV screens. It supports a main screen display capacity of 35 characters by 16 lines, with characters composed of up to 24 x 32 dots. The device incorporates display memory (VRAM), character font ROM, and sync signal generation circuits supporting both NTSC and PAL systems.
| Main screen display capacity | 35 characters x 16 lines |
|---|---|
| Character configuration | Normal characters: 24 x 32 dots |
| Graphic characters | 12 x 16 dots |
| Package type | 48-pin plastic QFP |
| Crystal oscillator frequency (NTSC) | 14.31818 MHz |
| Crystal oscillator frequency (PAL) | 17.734475 MHz |
The controller can display a maximum of 35 characters by 16 lines, totaling 560 characters.
The device requires a 14.31818 MHz oscillator for NTSC or a 17.734475 MHz oscillator for PAL.