参数资料
型号: EC000UM
英文描述: EC000 Core User's Manual (SCM68000)
中文描述: EC000核心用户手册(SCM68000)
文件页数: 32/145页
文件大小: 829K
代理商: EC000UM
16-Bit Instruction Execution Times
6-8
EC000 CORE PROCESSOR USER’S MANUAL
MOTOROLA
The following notation applies in Table 6-11:
Dn — Data register operand
M — Memory operand
6.11 MISCELLANEOUS INSTRUCTION EXECUTION TIMES
Table 6-12 and Table 6-13 list the timing data for miscellaneous instructions. The total num-
ber 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 6-11. Multiprecision Instruction Execution Times
Instruction
Size
op Dn, Dn
op M, M
ADDX
Byte, Word
Long
4(1/0)
8(1/0)
18(3/1)
30(5/2)
CMPM
Byte, Word
Long
12(3/0)
20(5/0)
SUBX
Byte, Word
Long
4(1/0)
8(1/0)
18(3/1)
30(5/2)
ABCD
Byte
6(1/0)
18(3/1)
SBCD
Byte
6(1/0)
18(3/1)
Table 6-12. Miscellaneous Instruction Execution Times
Instruction
Size
Register
Memory
ANDI to CCR
Byte
20(3/0)
ANDI to SR
Word
20(3/0)
EORI to CCR
Byte
20(3/0)
EORI to SR
Word
20(3/0)
ORI to CCR
Byte
20(3/0)
ORI to SR
Word
20(3/0)
MOVE from SR
Word
6(1/0)
8(1/1)+
MOVE to CCR
Word
12(1/0)
12(1/0)+
MOVE to SR
Word
12(2/0)
12(2/0)+
EXG
Long
6(1/0)
EXT
Word, Long
4(1/0)
LINK
Word
16(2/2)
MOVE from USP
Long
4(1/0)
MOVE to USP
Long
4(1/0)
NOP
4(1/0)
RESET
132(1/0)
RTE
20(5/0)
RTR
20(2/0)
RTS
16(4/0)
STOP
4(0/0)
SWAP
4(1/0)
UNLK
12(3/0)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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