MC141549P2

The MC141549P2 is a high performance HCMOS device designed to interface with a micro controller unit to allow colored symbols or characters to be displayed onto colour monitor. Because of the large number of fonts, 256 fonts including the programmable RAM fonts and fixed ROM fonts, SMOSD2 is suitable to be adopted for the multi-language monitor application especially. Its on-chip PLL allows both multisystem operation and self generation of system timing. It also minimizes the MCU's burden through its built-in RAM. By storing a full screen of data and control information, this device has a capability to carry out `screen-refresh' without any MCU supervision. Since there is no clearance between characters, special graphics oriented characters can be generated by combining two or more character blocks. Besides, there are two kinds of different resolutions that users can choose. By changing the number of dots per horizontal line to 320 (CGA) and 640 smaller characters with higher resolution can be easily achieved. Special functions such as character blinking, automatic height scaling,character/window bordering or character shadowing, four-level windows, double height and double width, and programmable vertical length of character are also incorporated. Furthermore, 8 programmable character/symbol RAM fonts are also built-in. It is much flexible to create the new symbols, icons and logo.

One special attractive application of the RAM fonts is the real-time programming to achieve the dynamic image instead of the static picture as previous.( Totally 256 characters and graphic fonts including 8 programmable RAM fonts and 248 ROM fonts; two selectable resolutions: 320 (CGA) and 640 (\/GA) Dots/Line; wide operating frequency range for high end monitor: max.120KHz; fully programmable character array of 15 rows by 30 columns; true 16-color selection for windows; fancy fade-in/fade-out effects; 8-color selection for characters with color intensity attribute on each row; auto height scaling to keep constant height independent of display modes; four programmable background windows with overlapping capability; shadowing on windows with programmable shadow width/height; character bordering or shadowing; character/symbol blinking function; programmable vertical height of character to meet multi-sync requirement; programmable vertical and horizontal positioning for display centre; double character height and double character width; internal PLL generates a wide-ranged system clock (76.8 MHz); M_BUS (IIC) interface with address $7A.

The absolute maximum rating of MC141549P2 are VDD(Supply Voltage)= - 0.3 to + 7.0V, Vin(Input Voltage)= VSS - 0.3 to VDD + 0.3V, Id(Current Drain per Pin Excluding VDD and VSS)=25 mA, Ta(Operating Temperature Range)= 0 to 85 , Tstg(Storage Temperature Range)=- 65 to + 150. (NOTE: Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the limits in the Electrical Characteristics.)