MC68HC000RC12 Datasheet, PDF (118/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
Table 8-1. Effective Address Calculation Times
Addressing Mode
Register
Dn
Data Register Direct
An
Address Register Direct
Memory
(An)
(An)+
Address Register Indirect
Address Register Indirect with Postincrement
–(An)
(d _16, An)
(d _8, An, Xn)*
(xxx).W
Address Register Indirect with Predecrement
Address Register Indirect with Displacement
Address Register Indirect with Index
Absolute Short
(xxx).L
(d _8, PC)
(d _16, PC, Xn)*
#<data>
Absolute Long
Program Counter Indirect with Displacement
Program Counter Indirect with Index
Immediate
*The size of the index register (Xn) does not affect execution time.
Byte, Word
0(0/0)
0(0/0)
4(1/0)
4(1/0)
6(1/0)
8(2/0)
10(2/0)
8(2/0)
12(3/0)
8(2/0)
10(2/0)
4(1/0)
Long
0(0/0)
0(0/0)
8(2/0)
8(2/0)
10(2/0)
12(3/0)
14(3/0)
12(3/0)
16(4/0)
12(3/0)
14(3/0)
8(2/0)
8.2 MOVE INSTRUCTION EXECUTION TIMES
Tables 8-2 and 8-3 list the numbers of clock periods 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.
Table 8-2. Move Byte and Word Instruction Execution Times
Destination
Source
Dn
An
(An)
Dn
4(1/0)
4(1/0)
8(2/0)
An
4(1/0)
4(1/0)
8(2/0)
(An)
8(1/1)
8(1/1)
12(2/1)
(An)+
8(1/1)
8(1/1)
12(2/1)
–(An)
8(1/1)
8(1/1)
12(2/1)
(d16, An)
12(2/1)
12(2/1)
16(3/1)
(An)+
–(An)
(d _16, An)
8(2/0)
10(2/0)
12(3/0)
8(2/0)
10(2/0)
12(3/0)
12(2/1)
14(2/1)
16(3/1)
12(2/1)
14(2/1)
16(3/1)
12(2/1)
14(2/1)
16(3/1)
16(3/1)
18(3/1)
20(4/1)
(d _8, An, Xn)*
(xxx).W
(xxx).L
14(3/0)
12(3/0)
16(4/0)
14(3/0)
12(3/0)
16(4/0)
18(3/1)
16(3/1)
20(4/1)
18(3/1)
16(3/1)
20(4/1)
18(3/1)
16(3/1)
20(4/1)
22(4/1)
20(4/1)
24(5/1)
(d _16, PC)
12(3/0)
(d _8, PC, Xn)* 14(3/0)
#<data>
8(2/0)
12(3/0)
14(3/0)
8(2/0)
16(3/1)
18(3/1)
12(2/1)
16(3/1)
18(3/1)
12(2/1)
16(3/1)
18(3/1)
12(2/1)
20(4/1)
22(4/1)
16(3/1)
*The size of the index register (Xn) does not affect execution time.
(d8, An, Xn)*
14(2/1)
14(2/1)
18(3/1)
18(3/1)
20(3/1)
22(4/1)
24(4/1)
22(4/1)
26(5/1)
22(4/1)
24(4/1)
18(3/1)
(xxx).W
12(2/1)
12(2/1)
16(3/1)
16(3/1)
18(3/1)
20(4/1)
22(4/1)
20(4/1)
24(5/1)
20(4/1)
22(4/1)
16(3/1)
(xxx).L
16(3/1)
16(3/1)
20(4/1)
20(4/1)
22(4/1)
24(5/1)
26(5/1)
24(5/1)
28(6/1)
24(5/1)
26(5/1)
20(4/1)
8-2
MC68000 8-/16-/32-MICROPROCESSORS UISER'S MANUAL
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