MC68020FE16E Freescale Semiconductor, MC68020FE16E Datasheet - Page 220
MC68020FE16E
Manufacturer Part Number
MC68020FE16E
Description
IC MICROPROCESSOR 32BIT 132CQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68020EH16E.pdf
(306 pages)
Specifications of MC68020FE16E
Processor Type
M680x0 32-Bit
Speed
166MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-CQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68020FE16E
Manufacturer:
MOTOROLA
Quantity:
1
Company:
Part Number:
MC68020FE16E
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68020FE16E
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
- Current page: 220 of 306
- Download datasheet (3Mb)
Example 2
Using the same instruction stream, the second example demonstrates the different effects
of instruction execution overlap on instruction timing when the same instructions are
positioned slightly differently in 32-bit memory:
The assumptions for example 2 (see Figure 8-4) are:
Although the total execution time of the instruction segment does not change in this
example, the individual instruction times are significantly different. This example
demonstrates that the effects of overlap are not only instruction-sequence dependent but
are also dependent upon the alignment of the instruction stream in memory.
8-6
EXECUTION TIME
1. The data bus is 32 bits,
2. The first instruction is prefetched from an even-word address,
3. Memory access occurs with no wait states, and
4. The cache is disabled.
INSTRUCTION
CONTROLLER
SEQUENCER
COUNTER
ACTIVITY
CLOCK
CLOCK
BUS
BUS
LEGEND:
1
IDLE
PERFORM
MOVE #1
MOVE.L D4,(A1)+
2
1) MOVE.L D4,(A1)+
2) ADD.L D4,D5
3) MOVE.L (A1),–(A2)
4) ADD.L D5,D6
WRITE TO (A1)+
Address
Figure 8-4. Processor Activity for Example 2
(4)
WRITE
3
PERFORM
Freescale Semiconductor, Inc.
ADD #2
For More Information On This Product,
4
5
CALCULATE
SOURCE EA
MOVE #3
M68020 USER’S MANUAL
Go to: www.freescale.com
BYTES n + 8
ADD.L D4,D5
PREFETCH
PREFETCH
n + 4
n + 8
6
n
(3)
7
IDLE
DESTINATION
8
CALCULATE
MOVE #3
READ FROM (A1)
MOVE #3
MOVE #1
EA
READ
9
•••
MOVE.L (A1),–(A2)
10
IDLE
(6)
11
PERFORM
MOVE #3
WRITE TO –(A2)
ADD #2
ADD #4
WRITE
12
•••
13
PERFORM
ADD #4
14
BYTES n + 12
ADD.L D5,D6
PREFETCH
PREFETCH
INSTRUCTION
15
(3)
NEXT
MOTOROLA
16
17
Related parts for MC68020FE16E
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
(MC600 Series) INTEGRATED CIRCUITS
Manufacturer:
ETC
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: