Advanced Monitor On-Screen Display

CMOS

The MC141543 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 493 bytes RAM. By storing a full screen of data and control information, this device has a capability to carry out ‘screen–refresh’ without MCU supervision.

• Three Selectable Resolutions: 320 (CGA), 480 (EGA) or 640 (VGA) Dots per Line

• Fully Programmable Character Array of 15 Rows by 30 Columns

• 493 Bytes Direct Mapping Display RAM Architecture

• Internal PLL Generates a Wide–Ranged System Clock

• For High–End Monitor Application, Maximum Horizontal Frequency is 110 kHz (70.4 MHz Dot Clock at 640 Mode)

• Programmable Vertical Height of Character to Meet Multi–Sync Requirement

• Programmable Vertical and Horizontal Positioning for Display Center

• 128 Characters and Graphic Symbols ROM (Mask ROM is Optional)

• 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

• Provides a Clock Output Synchronous to the Incoming H Sync for External PWM

• M_BUS (IIC) Interface with Address $7A

• Single Positive 5 V Supply