MC68EC030CFE25C Freescale Semiconductor, MC68EC030CFE25C Datasheet - Page 144
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MC68EC030CFE25C
Manufacturer Part Number
MC68EC030CFE25C
Description
IC MPU 32BIT ENH 25MHZ 132-CQFP
Manufacturer
Freescale Semiconductor
Specifications of MC68EC030CFE25C
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-CQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68EC030CFE25C
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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~
MOTOROLA
I
CACHE SIZE = 64 (LONG WORDS)
LINE SIZE = 4 (LONG WORDS)
SET SIZE = 1
The data cache on the MC68030 is a writethrough cache. When a hit occurs
the write is aborted, the corresponding entry is invalidated, and a bus error
to external memory, the cache contains the new value even if the external
though this should not have any adverse consequences. Refer to 7.6 BUS
on a write cycle, the data is written both to the cache and to external memory
(provided the M M U validates the access), regardless of the operand size and
even if the cache is frozen. If the M M U determines that the access is invalid,
exception is taken. Since the write to the cache completes before the write
write terminates in a bus error. The value in the data cache might be used
SYNCHRONIZATION for the details of bus synchronization.
by another instruction before the external write cycle has completed, al-
IA..;A A A A A A A A A A A A A A A A a : A a A A A l
3 , . . 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0
1...3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7
1 OF 16 L ~
SELECT l
~61
Figure 6-3. On-Chip Data Cache Organization
I
MC68030 USER'S MANUAL
TAD
;
V V V V
l )
•
j
JL_J
H
0
~
i
LINE HIT
- - D
O
VALID
I',S~X
i
i I I
LONG WORO
3 0 0 0 0
111
SELECT
I
I
3 2 I 0
•
,L
ENTRY HIT
•
ACCESS ADDRESS
,L
Q
o
T
L ~ "
~ CACHE CONTROL LOGIC
DATA FROM DATA CACHE
DATA BUS
DATA TO
EXECUTION UNIT
6-7
6
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