MC68EC030CFE25C Freescale Semiconductor, MC68EC030CFE25C Datasheet - Page 475
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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
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Quantity
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Part Number:
MC68EC030CFE25C
Manufacturer:
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11-12
An example using a series of instructions that require Equation (11-1) to
Therefore, the general Equation (11-1) can be used for both.
Top are footnoted in 11.6 INSTRUCTION TIMING TABLES.
The actual instruction-cache-case execution time for a stream of instructions
can be computed using Equation (11-1) or the general Equation (11-2). Equa-
tion (11-1) is used unless the instruction-cache case, head, and tail of an
effective address are required.
calculate the instruction-cache-case execution time follows. The assumptions
address time for either instruction. Since both of the instructions use register
operands only, there is no need to add effective address calculation times.
The following computations use Equation (11-1):
from an appropriate table use the general Equation (11-2) to calculate the
actual CC time. The CCea, Hea, and Tea values must be extracted from the
appropriate effective address table (either fetch effective address, fetch im-
The instructions that require the instruction-cache case, head, and tail of an
effective address (CCea, Hea, and Tea) to be overlapped with CCop, Hop, and
referred to in 11.6 INSTRUCTION TIMING TABLES apply.
Referring to the timing table in 11.6.8 Arithmetic/Logical Instructions, the
head, tail, and instruction-cache-case (CC) times for ADD.L A1,D1 and SUBA.L
D1,A2 are found. There is no footnote directing the user to add an effective
Instructions that require the addition of an effective address calculation time
Execution Time = CC1 + [CC2- min(H2,T1)]
The underlined numbers show the typical pattern for the comparison
1.
2.
of head and tail in the following equation.
ADD.L A1,D1
SUBA.L D1,A2
= 2+ [4- rain(4,0)]
=2+I4-01
= 6 clocks
MC68030 USER'S MANUAL
2.
1.
ADD.L
SUBA.L
Instruction
NOTE
Head
A1,D1
D1,A2
2
4
Tail
0
0
MOTOROLA
CC
2
4
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