MC68030FE25C Freescale Semiconductor, MC68030FE25C Datasheet - Page 184
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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MOTOROLA
the data strobe by itself since there is only one valid byte for every transfer.
These enable or strobe signals select only the bytes required for write cycles
or for noncachable read cycles. The other bytes are not selected, which
enable signals for 16- and 32-bit ports from the size and address encodings
and the read/write signal.
32-bit slave can only receive three bytes in the current bus cycle. A 16- or
8-bit slave can only receive one byte. The table defines the byte enables for
all port sizes. Byte data strobes can be obtained by combining the enable
signals with the data strobe signal. Devices residing on 8-bit ports can use
prevents incorrect accesses in sensitive areas such as I/O.
Figure 7-18 shows a logic diagram for one method for generating byte data
The table shows that the MC68030 transfers the number of bytes specified
misaligned or the number of bytes is greater than the port width. In these
cases, the device transfers the greatest number of bytes possible fo r the port.
For example, if the size is four bytes and the address offset (A1 :A0) is 01, a
by the size signals to or from the specified address unless the operand is
Word
3 Byte
Long Word
Byte
Transfer
Size
SlZl
0
0
0
0
0
0
0
0
1
1
1
I
I
I
1
1
T a b l e
SIZ0
I
I
I
0
0
0
0
0
0
0
0
1
1
1
1
1
B y t e , W o r d ,
7 - 7 . D a t a
MC68030 USER'S MANUAL
A1
0
I
I
0
0
0
0
0
0
0
1
1
1
1
1
1
B u s W r i t e
a n d L o n g - W o r d
A0
0
I
I
0
0
0
0
0
1
1
0
0
1
1
1
1
: B
D31 :D24
Byte (B) - Word (W) - Long-Word (L) Ports
BWL
B
BW
B
BWL
B
BW
B
BWL
B
BW
B
BWL
B
BW
E n a b l e
Data Bus Active Sections
D23:D16
S i g n a l s
P o r t s
W
WL
WL
W
W
W
WL
WL
W
W
WL
WL
W
WL
f o r
D15:D8
- -
- -
- -
- -
L
L
L
L
L
L
L
L
L
D7:D0
L
L
L
L
L
L
L
L
L
L
7-23
7
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