MC68HC000EI20 Datasheet, PDF (135/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

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Table 9-11. Single Operand Instruction Loop Mode Execution Times
Instruction
CLR
NBCD
NEG
NEGX
NOT
TST
Loop Continued
Valid Count, cc False
Size
Byte,
Word
Long
Byte
Byte,
Word
Long
Byte,
Word
Long
Byte,
Word
Long
Byte,
Word
Long
(An)
10(0/1)
14(0/2)
18(1/1)
16(1/1)
24(2/2)
16(1/1)
24(2/2)
16(1/1)
24(2/2)
12(1/0)
18(2/0)
(An)+
–(An)
10(0/1) 12(0/1)
14(0/2)
18(1/1)
16(1/1)
16(0/2)
20(1/1)
18(2/2)
24(2/2) 26(2/2)
16(1/1) 18(2/2)
24(2/2) 26(2/2)
16(1/1) 18(2/2)
24(2/2) 26(2/2)
12(1/0) 14(1/0)
18(2/0) 20(2/0)
Loop Terminated
Valid Count, cc True
Expired Count
(An)
18(2/1)
(An)+
–(An)
(An)
18(2/1) 20(2/0) 16(2/1)
(An)+
–(An)
16(2/1) 18(2/1)
22(2/2)
24(3/1)
22(3/1)
22(2/2)
24(3/1)
22(3/1)
24(2/2)
26(3/1)
24(3/1)
20(2/2)
22(3/1)
20(3/1)
20(2/2)
22(3/1)
20(3/1)
22(2/2)
24(3/1)
22(3/1)
30(4/2)
22(3/1)
30(4/2) 32(4/2) 28(4/2)
22(3/1) 24(3/1) 20(3/1)
28(4/2) 30(4/2)
20(3/1) 22(3/1)
30(4/2)
22(3/1)
30(4/2) 32(4/2) 28(4/2)
22(3/1) 24(3/1) 20(3/1)
28(4/2) 30(4/2)
20(3/1) 22(3/1)
30(4/2)
18(3/0)
30(4/2) 32(4/2) 28(4/2)
18(3/0) 20(3/0) 16(3/0)
28(4/2) 30(4/2)
16(3/0) 18(3/0)
24(4/0) 24(4/0) 26(4/0) 20(4/0) 20(4/0) 22(4/0)
9.6 SHIFT/ROTATE INSTRUCTION EXECUTION TIMES
Tables 9-12 and 9-13 list the timing data for the shift and rotate instructions. The total
number of clock periods, 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 (+).
Table 9-12. Shift/Rotate Instruction Execution Times
Instruction
ASR, ASL
Size
Byte, Word
LSR, LSL
Long
Byte, Word
Long
ROR, ROL
ROXR, ROXL
Byte, Word
Long
Byte, Word
Long
+Add effective address calculation time.
n is the shift or rotate count.
* Word only.
Register
6+2n (1/0)
8+2n (1/0)
6+2n (1/0)
8+2n (1/0)
6+2n (1/0)
8+2n (1/0)
6+2n (1/0)
8+2n (1/0)
Memory*
8(1/1)+
—
8(1/1)+
—
8(1/1)+
—
8(1/1)+
—
9-8
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
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