器件名称:
MC141540P4
功能描述:
Monitor On-Screen Display CMOS
文件大小:
186.79KB 共12页
简 介:
MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC141540/D MC141540 Monitor On-Screen Display CMOS The MC141540 is a high performance HCMOS device designed to interface with a microcontroller unit to allow colored symbols or characters to be displayed on a color monitor. The on–chip PLL allows both multi–system operation and self–generation of system timing. It also minimizes the MCU’s burden through its built–in 273 bytes display/control RAM. By storing a full screen of data and control information, this device has a capability to carry out ‘screen–refresh’ without MCU supervision. Since there is no spacing between characters, special graphics–oriented characters can be generated by combining two or more character blocks. Special functions such as character bordering or shadowing, multi–level windows, double height and double width, and programmable vertical length of character can also be incorporated. Furthermore, neither massive information update nor extremely high data transmission rate are expected for normal on– screen display operation, and serial protocols are implemented in lieu of any parallel formats to achieve minimum pin count. Fixed Resolution: 320 (CGA) Dots per Line Fully Programmable Character Array of 10 Rows by 24 Columns 273 Bytes Direct Mapping Display RAM Architecture Internal PLL Generates a Wide–Ranged System Clock For High–End Monitor Application, Maximum Horizontal Frequency is 100 kHz (32 MHz Dot Clock) Programmable……
