MC68EC000 Motorola, MC68EC000 Datasheet - Page 111

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

8-Bit Instruction Execution Times
5.2 MOVE INSTRUCTION EXECUTION TIMES
Table 5-2, Table 5-3, and Table 5-4 list the numbers of clock periods required for the move
instructions. The totals include instruction fetch, operand reads, and operand writes. The
total number of clock periods, the number of read cycles, and the number of write cycles are
shown in the previously described format.
5-2
Dn
An
(An)
(An)+
–(An)
(d 16 , An)
(d 8 , An, Xn)*
(xxx).W
(xxx).L
(d 16 , PC)
(d 8 , PC, Xn)*
#<data>
*The size of the index register (Xn) does not affect execution time.
Dn
(An)
(An)+
–(An)
(d 16 , An)
(d 8 , An, Xn)*
(xxx).W
(xxx).L
(d 16 , PC)
(d 8 , PC, Xn)*
#<data>
*The size of the index register (Xn) does not affect execution time.
Source
Data Register Direct
Address Register Direct
Address Register Indirect
Address Register Indirect with Postincrement
Address Register Indirect with Predecrement
Address Register Indirect with Displacement
Address Register Indirect with Index
Absolute Short
Absolute Long
Program Counter Indirect with Displacement
Program Counter Indirect with Index
Immediate
12 (3/0)
12 (3/0)
14 (3/0)
20 (5/0)
22 (5/0)
20 (5/0)
28 (7/0)
20(5/0)
22(5/0)
16(4/0)
8 (2/0)
Dn
Table 5-2. Move Byte Instruction Execution Times
Addressing Mode
12 (3/0)
12 (3/0)
14 (3/0)
20 (5/0)
22 (5/0)
20 (5/0)
28 (7/0)
20(5/0)
22(5/0)
16(4/0)
Table 5-1. Effective Address Calculation Times
8 (2/0)
An
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EC000 CORE PROCESSOR USER’S MANUAL
For More Information On This Product,
12 (2/1)
16 (3/1)
16 (3/1)
18 (3/1)
24 (5/1)
26 (5/1)
24 (5/1)
32 (7/1)
24(5/1)
26(5/1)
20(4/1)
(An)
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12 (2/1)
16 (3/1)
16 (3/1)
18 (3/1)
24 (5/1)
26 (5/1)
24 (5/1)
32 (7/1)
24(5/1)
26(5/1)
20(4/1)
(An)+
Register
Memory
12 (2/1)
16 (3/1)
16 (3/1)
18 (3/1)
24 (5/1)
26 (5/1)
24 (5/1)
32 (7/1)
24(5/1)
26(5/1)
20(4/1)
–(An)
Destination
(d 16 , An)
24 (5/1)
20 (4/1)
24 (5/1)
26 (5/1)
32 (7/1)
34 (7/1)
32 (7/1)
40 (9/1)
32(7/1)
34(7/1)
28(6/1)
12 (3/0)
14 (3/0)
12 (3/0)
20 (5/0)
12 (3/0)
14 (3/0)
0 (0/0)
0 (0/0)
4 (1/0)
4 (1/0)
6 (1/0)
8 (2/0)
Byte
(d 8 , An, Xn)*
22 (4/1)
26 (5/1)
26 (5/1)
28 (5/1)
34 (7/1)
36 (7/1)
34 (7/1)
42(9/1)
34(7/1)
36(7/1)
30(6/1)
10 (2/0)
16 (4/0)
18 (4/0)
16 (4/0)
24 (6/0)
16 (3/0)
18 (4/0)
0 (0/0)
0 (0/0)
8 (2/0)
8 (2/0)
8 (2/0)
Word
(xxx).W
20 (4/1)
24 (5/1)
24 (5/1)
26 (5/1)
32 (7/1)
34(7/1)
32(7/1)
40(9/1)
32(7/1)
34(7/1)
28(6/1)
MOTOROLA
16 (4/0)
16 (4/0)
18 (4/0)
24 (6/0)
26 (6/0)
24 (6/0)
32 (8/0)
24 (6/0)
26 (6/0)
16 (4/0)
0 (0/0)
0 (0/0)
Long
48(11/1)
(xxx).L
28 (6/1)
32 (7/1)
32 (7/1)
34 (7/1)
40 (9/1)
42(9/1)
40(9/1)
40(9/1)
42(9/1)
36(8/1)