MC68EC020FG25 Freescale Semiconductor, MC68EC020FG25 Datasheet - Page 254
MC68EC020FG25
Manufacturer Part Number
MC68EC020FG25
Description
IC MPU 32 BIT 25MHZ 100-QFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68EC020AA16.pdf
(306 pages)
Specifications of MC68EC020FG25
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
-
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8.2.18 Save and Restore Operations
The save and restore operations table indicates the number of clock periods needed for
the processor to perform the specified state save or return from exception, with complete
execution times and stack length given. No additional tables are needed to calculate total
effective execution time for these operations. The total number of clock cycles is outside
the parentheses; the number of read, prefetch, and write cycles is given inside the
parentheses as (r/p/w). These cycles are included in the total clock cycle number.
*
8-40
Bus Cycle Fault (Short)
Bus Cycle Fault (Long)
RTE (Normal)
RTE (Six Word)
RTE (Throwaway)
RTE (Coprocessor)
RTE (Short Fault)
RTE (Long Fault)
Add the time for RTE on second stack frame.
*
Operation
M68020 USER’S MANUAL
Best Case
42(1/0/10)
79(1/0/24)
42(10/0/0)
91(24/0/0)
20(4/0/0)
20(4/0/0)
15(4/0/0)
31(7/0/0)
Cache Case
43(1/0/10)
79(1/0/24)
43(10/0/0)
92(24/0/0)
21(4/0/0)
21(4/0/0)
16(4/0/0)
32(7/0/0)
Worst Case
50(1/2/10)
86(1/2/24)
45(10/2/0)
94(24/2/0)
24(4/2/0)
24(4/2/0)
39(4/0/0)
33(7/1/0)
MOTOROLA
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