Organization; Advantages - Motorola DragonBall MC68328 User Manual

• Power Management
—3.3 V Operation
—Fully Static HCMOS Technology
—Programmable Clock Synthesizer for Full Frequency Control
—Low Power Stop Capabilities
—Individual Module Shut Down Capability
—Lowest Power-Mode Control (Shut Down CPU and Peripherals)
• LCD Control Module
—Software Programmable Screen Size to Support Single (Non-Split) Monochrome/
STN Panels
—Direct Drive Capability of Common LCD Drivers/Modules from Motorola and Other
LCD Drive Manufacturers
—Support as Many as 4 Grey Levels
—Use System Memory as Display Memory
• IEEE 1149.1 Boundary Scan Test Access Port (JTAG)
• Operation From DC To 16.67 MHz (Processor Clock)
• Operating Voltage of 3.3V
• Compact 144-Lead Thin-Quad-Flat-Pack (TQFP) Package

1.1.1 ORGANIZATION

The M68300 family of integrated processors and controllers is built on an M68000 core pro-
cessor and a selection of intelligent peripherals appropriate for a set of applications. Com-
mon system glue logic such as address decoding, wait-state insertion, interrupt
prioritization, and watchdog timing is also included.
Each member of the M68300 family is distinguished from the others by its selection of on-
chip peripherals. Peripherals are chosen to address specific applications but are often use-
ful in a variety of applications. The peripherals may be highly sophisticated timing or protocol
engines that have their own processors, or they may be more traditional peripheral functions
such as UARTs and timers.

1.1.2 ADVANTAGES

The many features incorporated into a single M68300 Family chip help system designers
realize significant savings in design time, power consumption, cost, board space, pin count,
and programming. The equivalent functionality can easily require 20 separate components.
Each component might have 16–64 pins, totalling over 350 connections. Most of these con-
nections require interconnects or are duplications. Each connection: (1) is a candidate for a
bad solder joint or misrouted trace, (2) is another part to qualify, purchase, inventory, and
maintain. Each component (1) requires a share of the printed circuit board, (2) draws power,
which often drives large buffers to get the signal to another chip. The cumulative power con-
sumption of all the components must be available from the power supply. The signals
between the central processor unit (CPU) and a peripheral might not be compatible nor run
from the same clock, which could require time delays or other special design considerations.
In an M68300 family component, the major functions and glue logic are all properly con-
nected internally, timed with the same clock, fully tested, and uniformly documented. Only
MOTOROLA MC68328 DRAGONBALL PROCESSOR USER'S MANUAL
0.3V
Overview
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