MC2674

MOTOROLA ~SEMICONDUCTOR~~~~~~~~~~~~~ TECHNICAL DATA MC2674 Advance Information Advanced Video Display Controller (AVDC) 3 The MC2674 advanced video display controller (AVDC) is a programmable device designed for use in CRT terminals and display systems that employ raster-scan techniques. The AVDC generates the vertical and horizontal timing signals necessary for the display of interlaced or non-interlaced data on a CRT monitor. It provides consecutive addressing to a user specified display buffer memory domain and controls the CPU-display buffer interface for various buffer configuration modes. A variety of operating modes, display formats, and timing profiles can be implemented by programming the control registers in the AVDC. A minimum CRT terminal system configuration consists of an AVDC, a keyboard controller, an asynchronous communications interface adapter, character ROM, and an attributes controller. Other necessary parts of the system are a single-chip microcomputer such as the MC6809, display buffer RAM, and a small amount of TIL for miscellaneous address decoding, interface, and control. System complexity can be enhanced by upgrading the microprocessor and expanding via the system address and data buses. 4 MHz Character Rate 1 to 256 Characters Per Row 1 to 16 Raster Lines Per Character Row Bit Mapped Graphics Mode Programmable Horizontal and Vertical Sync Generators Interlaced or Non-Interlaced Operation Up to 64K RAM Address for Multiple-Page Op...