MC141540中文資料摩托羅拉數(shù)據(jù)手冊(cè)PDF規(guī)格書

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.

? 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 Vertical Height of Character to Meet Multi–Sync Requirement

? Programmable Vertical and Horizontal Positioning for Display Center

? 128 Characters and Graphic Symbols ROM

? 10 x 16 Dot Matrix Character

? Character–by–Character Color Selection

? A Maximum of Four Selectable Colors per Row

? Double Character Height and Double Character Width

? Character Bordering or Shadowing

? Three Fully Programmable Background Windows with Overlapping Capability

? Single Positive 5 V Supply

? MC141540P4 is a Replacement for XC141540P with Two Symbols Added in ROM Addresses ‘5C’ and ‘5E’