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MOTOROLA
MC68349 USER'S MANUAL
1- 3
Power Management
—5 V or 3.3 V Operation
—Fully Static HCMOS Technology
—Programmable Clock Synthesizer for Full Frequency Control
—Power-Down/Low Power Stop Capabilities
—Idle Modules Can Be Individually Powered Down
32-Bit Data Paths for On-Chip and Off-Chip Access
0–16- or 25-MHz Operation
160-Pin Plastic QFP
NOTE
As a low voltage part, the MC68349V can operate with a 3.3-V
power supply. MC68349 is used throughout this manual to
refer to both the low voltage and standard 5-V parts since both
are functionally equivalent.
1.2 M68300 FAMILY
The MC68349 is one of a series of components in the M68300 family.
1.2.1 Organization
The M68300 family of integrated processors and controllers is built on an M68000 core
processor, an on-chip bus, and a selection of intelligent peripherals appropriate for a set of
applications. The CPU030 blends the powerful CPU32+ with on-chip instruction caches
and data memory to deliver MC68030 performance with minimal degradation due to slow
external memory systems. A system integration module incorporates the external bus
interface and many of the smaller circuits that typically surround a microprocessor for
address decoding, wait-state insertion, interrupt prioritization, clock generation, arbitration,
watchdog timing, and power-on reset timing.
Each member of the M68300 family is distinguished by its selection of peripherals.
Peripherals are chosen to address specific applications but are often useful in a wide
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 universal asynchronous receivers/transmitters (UARTs) and timers.
Since each major function is designed in a standalone module, each module might be
found in many different M68300 family parts. Driver software written for a module on one
M68300 part can be used to run the same module that appears on another part.