Vendor: Digital Blocks, Inc. Category: System Controller

Motorola MC6845 Functional Equivalent CRT Controller

The DB6845 CRT Controller core is a full function equivalent to the Motorola MC6845 device.

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Overview

The DB6845 CRT Controller core is a full function equivalent to the Motorola MC6845 device. The DB6845 interfaces a microprocessor to a raster-scan CRT display. The microprocessor access 19 registers (1 Address and 18 Data Registers) within the DB6845 in order to provide video timing, refresh memory addresses, cursor, and light pen strobe signals. CRT video timing signals include Vertical Sync (VS), Horizontal Sync (HS), and Display Enable (DE) output signals. Refresh memory addressing includes Memory Address (MA[13:0]) and Row Address (RA[4:0]) output buses.

Key features

  • Synchronous, synthesizable VHDL Core, functionally equivalent to Motorola MC6845. 
    Capable of driving alphanumeric, semi-graphic, or bit-mapped graphics displays. Wide range of programmable screen formats. 
    Programmable registers controlling output signals Vertical Sync (VS), Horizontal  Sync (HS), and Display Enable (DE) signals. Programmable horizontal line rate  and sync pulse width. Programmable vertical frame rate. 
    Programmable registers controlling Memory Address (MA[13:0]) start address.  Programmable Start Address Register for Hardware Scrolling.  
    Programmable registers controlling Row Address (RA[4:0]) size, yielding a character row. 
    Programmable register controlling Normal Sync (Non-Interlace), Interlace Sync, or Interlace Sync & Video Mode. 
    Programmable registers for control and format of Cursor. 
    Light Pen Register. 
    Microprocessor 8-bit Data Bus and Control Interface.

Block Diagram

DB6845 block diagram

Specifications

Identity

Part Number
DB6845
Vendor
Digital Blocks, Inc.
Type
Silicon IP

Files

Product Sheet Download

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Provider

Digital Blocks, Inc.
HQ: USA
Digital Blocks architects, designs, verifies, and markets semiconductor Intellectually Property (IP) cores to worldwide technology systems companies. The company's expertise is in Embedded Processor & Peripherals, Display Controller, Display Link Layer, 2D Graphics, Image Compression, Audio / Video Processing, and High-Speed Networking / A/V Networking & Routing / High-Frequency Trading Networking.
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Frequently asked questions about system controller IP cores

What is Motorola MC6845 Functional Equivalent CRT Controller?

Motorola MC6845 Functional Equivalent CRT Controller is a System Controller IP core from Digital Blocks, Inc. listed on Semi IP Hub.

How should engineers evaluate this System Controller?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this System Controller IP.

Can this semiconductor IP be compared with similar products?

Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.

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