MC68EC000 Motorola, MC68EC000 Datasheet - Page 122

• Manufacturer Part Number: MC68EC000
• Description: Core Processor (SCM 68000)
• Manufacturer: Motorola

6.3 STANDARD INSTRUCTION EXECUTION TIMES
The numbers of clock periods listed in Table 6-4 indicate the times required to perform the
operations, store the results, and read the next instruction. The total number of clock peri-
ods, the number of read cycles, and the number of write cycles are shown in the previously
described format. The number of clock periods, the number of read cycles, and the number
of write cycles, respectively, must be added to those of the effective address calculation
where indicated by a plus sign (+).
In Table 6-4, the following notation applies:
MOTOROLA
Dn
An
(An)
(An)+
–(An)
(d 16 , An)
(d 8 , An, Xn)*
(xxx).W
(xxx).L
(d, PC)
(d, PC, Xn)*
#<data>
*The size of the index register (Xn) does not affect execution time.
Source
Dn — Data register operand
An — Address register operand
ea — An operand specified by an effective address
M — Memory effective address operand
12(3/0)
12(3/0)
14(3/0)
16(4/0)
18(4/0)
16(4/0)
20(5/0)
16(4/0)
18(4/0)
12(3/0)
4(1/0)
4(1/0)
Dn
Table 6-3. Move Long Instruction Execution Times
12(3/0)
12(3/0)
14(3/0)
16(4/0)
18(4/0)
16(4/0)
20(5/0)
16(4/0)
18(4/0)
12(3/0)
4(1/0)
4(1/0)
An
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EC000 CORE PROCESSOR USER’S MANUAL
For More Information On This Product,
12(1/2)
12(1/2)
20(3/2)
20(3/2)
22(3/2)
24(4/2)
26(4/2)
24(4/2)
28(5/2)
24(4/2)
26(4/2)
20(3/2)
(An)
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12(1/2)
12(1/2)
20(3/2)
20(3/2)
22(3/2)
24(4/2)
26(4/2)
24(4/2)
28(5/2)
24(4/2)
26(4/2)
20(3/2)
(An)+
12(1/2)
12(1/2)
20(3/2)
20(3/2)
22(3/2)
24(4/2)
26(4/2)
24(4/2)
28(5/2)
24(4/2)
26(4/2)
20(3/2)
–(An)
Destination
(d 16 , An)
16(2/2)
16(2/2)
24(4/2)
24(4/2)
26(4/2)
28(5/2)
30(5/2)
28(5/2)
32(6/2)
28(5/2)
30(5/2)
24(4/2)
16-Bit Instruction Execution Times
(d 8 , An, Xn)*
18(2/2)
18(2/2)
26(4/2)
26(4/2)
28(4/2)
30(5/2)
32(5/2)
30(5/2)
34(6/2)
30(5/2)
32(5/2)
26(4/2)
(xxx).W
16(2/2)
16(2/2)
24(4/2)
24(4/2)
26(4/2)
28(5/2)
30(5/2)
28(5/2)
32(6/2)
28(5/2)
30(5/2)
24(4/2)
(xxx).L
20(3/2)
20(3/2)
28(5/2)
28(5/2)
30(5/2)
32(6/2)
34(6/2)
32(6/2)
36(7/2)
32(5/2)
34(6/2)
28(5/2)
6-3