MC68030FE25C Freescale Semiconductor, MC68030FE25C Datasheet - Page 41
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MC68030FE25C
Manufacturer Part Number
MC68030FE25C
Description
IC MPU 32BIT ENHANCED 132-CQFP
Manufacturer
Freescale Semiconductor
Specifications of MC68030FE25C
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-CQFP
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
25MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
5V
Operating Supply Voltage (max)
5.25V
Operating Supply Voltage (min)
4.75V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
132
Package Type
CQUAD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68030FE25C
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68030FE25C
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
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1.6.1 Virtual M e m o r y
1-12
1.6 V IR TU AL M E M O R Y A N D VIRTUAL M A C H I N E CONCEPTS
to access devices that are not physically present in the system, such as tape
A system that supports virtual memory has a limited amount of high-speed
tains an image of a much larger virtual memory on a secondary storage
The MC68030 uses instruction continuation to support virtual memory. When
the bus error handler has completed execution, it returns control to the
The full addressing range of the MC68030 is 4 Gbytes (4,294,967,296 bytes)
4 Gbytes of memory available to each user program by using virtual memory
techniques.
amount of memory available, when the physical memory actually present is
drives, disk drives, printers, terminals, and so forth. With proper software
emulation, a physical system can appear to be any other M68000 computer
system to a user program, and the program can be given full access to all
of the resources of that emulated system. Such an emulated system is called
a virtual machine.
physical memory that can be accessed directly by the processor and main-
device such as a large-capacity disk drive. When the processor attempts to
access a location in the virtual memory map that is not resident in physical
memory, a page fault occurs. The access to that location is temporarily sus-
placed in physical memory. The suspended access is then either restarted
or continued.
a bus cycle is terminated with a bus error, the microprocessor suspends the
current instruction and executes the virtual memory bus error handler. When
in each of eight address spaces. Even though most systems implement a
smaller physical memory, the system can be made to appear to have a full
In a virtual memory system, a user program can be written as if it has a large
much smaller. Similarly, a system can be designed to allow user programs
pended while the necessary data is fetched from secondary storage and
program that was executing when the error was detected, reruns the faulted
bus cycle (when required), and continues the suspended instruction.
MC68030 USER'S MANUAL
MOTOROLA
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