Motorola M68000 User Manual page 132

Table 9-6. Standard Instruction Execution Times
Instruction
ADD/ADDA
AND
CMP/CMPA
DIVS
DIVU
EOR
MULS/MULU
OR
SUB/SUBA
+ Add effective address calculation time.
* Indicates maximum value.
** Only available address mode is data register direct.
*** Word or long word only.
Table 9-7 Standard Instruction Loop Mode Execution Times
op<ea>,
Instruction Size
ADD Byte, 18(1/0)
Word
Long 22(2/0)
AND Byte,
Word
Long
CMP Byte, 12(1/0)
Word
Long 18(2/0)
EOR Byte,
Word
Long
OR Byte,
Word
Long
SUB Byte, 18(1/0)
Word
Long 22(2/0)
*Word or long word only.
<ea> may be (An), (An)+, or –(An) only. Add two clock periods to the table value if <ea> is –(An).
MOTOROLA M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
Freescale Semiconductor, Inc.
Size op<ea>, An***
Byte, Word
Long
Byte, Word
Long
Byte, Word
Long
—
—
Byte, Word
Long
—
—
Byte, Word
Long
Byte, Word
Long
Loop Continued
Valid Count cc False
op<ea>, op Dn,
An* Dn <ea>
16(1/0) 16(1/1)
22(2/0) 24(2/2)
— 16(1/0) 16(1/1)
— 22(2/0) 24(2/2)
12(1/0) —
18(2/0) —
— — 16(1/0)
— — 24(2/2)
— 16(1/0) 16(1/0)
— 22(2/0) 24(2/2)
16(1/0) 16(1/1)
20(2/0) 24(2/2)
For More Information On This Product,
Go to: www.freescale.com
op<ea>, Dn
8(1/0)+ 4(1/0)+
6(1/0)+ 6(1/0)+
— 4(1/0)+
— 6(1/0)+
6(1/0)+ 4(1/0)+
6(1/0)+ 6(1/0)+
— 122(1/0)+
— 108(1/0)+
— 4(1/0)**
— 6(1/0)**
— 42(1/0)+*
— 40(1/0)*
— 4(1/0)+
— 6(1/0)+
8(1/0)+ 4(1/0)+
6(1/0)+ 6(1/0)+
Loop Terminated
Valid Count cc True
op<ea>, op<ea>, op Dn,
An* Dn <ea>
24(3/0) 22(3/0) 22(3/1)
28(4/0) 28(4/0) 30(4/2)
— 22(3/0) 22(3/1)
— 28(4/0) 30(4/2)
18(3/0) 18(3/0) —
24(4/0) 24(4/0) —
— — 22(3/1)
— — 30(4/2)
— 22(3/0) 22(3/1)
— 28(4/0) 30(4/2)
24(3/0) 22(3/0) 22(3/1)
28(4/0) 26(4/0) 30(4/2)
op Dn, <M>
8(1/1)+
12(1/2)+
8(1/1)+
12(1/2)+
—
—
—
—
8(1/1)+
12(1/2)+
—
—
8(1/1)+
12(1/2)+
8(1/1)+
12(1/2)+
Expired Count
op<ea>, op<ea>, op Dn,
An* Dn <ea>
22(3/0) 20(3/0) 20(3/1)
26(4/0) 26(4/0) 28(4/2)
— 20(3/0) 20(3/1)
— 26(4/0) 28(4/2)
16(3/0) 16(4/0) —
20(4/0) 20(4/0) —
— — 20(3/1)
— — 28(4/2)
— 20(3/0) 20(3/1)
— 26(4/0) 28(4/2)
22(3/0) 20(3/0) 20(3/1)
26(4/0) 24(4/0) 28(4/2)
9- 5