Freescale Semiconductor, Inc.
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Microprocessor and Memory
Technologies Group
MC68322
Product Brief
Integrated Printer Processor
The MC68322 is a high-performance integrated printer processor, which combines an MC68000 compatible
EC000 Core processor, a RISC graphics processor (RGP) and a print engine video controller (PVC) with
numerous system integration features on a single integrated circuit. It is the first of Motorola's M68000 family
designed specifically for laser printers. The MC68322 provides a unique solution for new designs as well as
an excellent migration path for existing M68000-powered printers. Additionally, the new chip will find ready
application to the inkjet printer and multifunction-peripheral (Fax/Modem/Printer) markets and other
embedded control applications, which require very fast bit manipulations. The MC68322 provides
outstanding performance at an extremely affordable price.
Historically, printer applications have been solved using a single general purpose processor and external
application specific circuitry. The MC68322 employs a highly specialized, multi-processor architecture, which
enables the user to take advantage of memory reduction techniques. This design implementation provides a
technically superior and more cost effective system solution. Specialized display list banding techniques
executed by the dedicated RISC graphics processor enable system memory requirements to be significantly
reduced.
The use of software memory reduction techniques alone, an approach taken by conventional controllers,
lack the power needed to handle complex pages, causing the controller to fall back to lower resolution or
reduced page throughput. By integrating an EC000 Core, RGP, and PVC using a unique dual bus
architecture, the MC68322 optimizes overall system performance. The dual bus architecture eliminates bus
contention between processing units creating a true parallel processing environment. The additional
bandwidth allows each processing unit to operate at peak performance. Working in conjunction with an on-
chip, programmable, bursting DRAM controller, the processing units are capable of achieving outstanding
throughput. These dedicated processing units enable the MC68322 to produce 600 dot per inch images
using substantially less memory than conventional controllers. The MC68322 extends these benefits to low-
cost 4–8 page per minute printers.
The MC68322 significantly reduces component count, board space, power consumption and their inherent
costs while yielding higher reliability and shorter design time. The MC68322 provides support for toner
conservation, enabling the print controller to conserve toner when printing in draft mode. The MC68322
provides the perfect printing environment for users of complex page description languages (such as PCL
and PostScript) and less scaleable graphics imaging models such as Windows Printing System and
QuickDraw). Complete code compatibility with the M68000 Family provides the designer access to a broad
base of established real-time kernels, operating systems, languages, applications and development tools,
many of which are optimized for embedded processing and printing applications. Figure 1 shows a block
diagram of the MC68322.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without
notice.Company and product names that appear in this document are for identification purposes and should be considered registered trademarks of their
respective owners.
SEMICONDUCTOR PRODUCT INFORMATION
For More Information On This Product,
Go to: www.freescale.com
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