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