MC68040FE33A Freescale Semiconductor, MC68040FE33A Datasheet - Page 86

IC MICROPROCESSOR 32BIT 184-CQFP

MC68040FE33A

Manufacturer Part Number
MC68040FE33A
Description
IC MICROPROCESSOR 32BIT 184-CQFP
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68040FE33A

Processor Type
M680x0 32-Bit
Speed
33MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
184-CQFP
Package
184CQFP
Processor Series
M680xx
Core
CPU32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68040FE33A
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
memory is always updated through an external bus access after updating the cache,
keeping memory and cached data consistent.
4.1 CACHE OPERATION
Both four-way set-associative caches have 64 sets of four 16-byte lines. There are two
formats that define each cache line, an instruction cache line format and a data cache line
format. Each format contains an address tag consisting of the upper 22 bits of the physical
address, status information, and four long words (128 bits) of data. The status information
for the instruction cache line address tag consists of a single valid bit for the entire line.
The status information for the data cache line address tag contains a valid bit and four
additional bits to indicate dirty status for each long word in the line. Note that only the data
cache supports dirty cache lines. Figure 4-2 illustrates the instruction cache line format (a)
and the data cache line format (b).
4-2
POINT UNIT
FLOATING-
CONVERT
EXECUTE
WRITE-
BACK
INSTRUCTION
CALCULATE
WRITEBACK
EXECUTE
INTEGER
DECODE
FETCH
FETCH
UNIT
EA
EA
Figure 4-1. Overview of Internal Caches
Freescale Semiconductor, Inc.
For More Information On This Product,
M68040 USER'S MANUAL
OPERAND DATA BUS
Go to: www.freescale.com
INSTRUCTION
INSTRUCTION DATA BUS
DATA
ATC
ATC
INSTRUCTION MEMORY UNIT
MMU/CACHE/SNOOP
MMU/CACHE/SNOOP
DATA MEMORY UNIT
INSTRUCTION
CONTROLLER
CONTROLLER
DATA
INSTRUCTION
CACHE
CACHE
DATA
INSTRUCTION
ADDRESS
ADDRESS
DATA
B
U
S
C
O
N
R
O
E
R
T
L
L
MOTOROLA
ADDRESS
CONTROL
SIGNALS
DATA
BUS
BUS
BUS

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