MC68020 Motorola, MC68020 Datasheet - Page 243

• Manufacturer Part Number: MC68020
• Description: (MC68020 / MC68EC020) MICROPROCESSORS USERS MANUAL
• Manufacturer: Motorola

8.2.7 Special-Purpose MOVE Instruction
The special-purpose MOVE instruction table indicates the number of clock periods needed
for the processor to fetch, calculate, and perform the special-purpose MOVE operation on
the control registers or specified effective address. The total number of clock cycles is
outside the parentheses, the number of read, prefetch, and write cycles is given inside the
parentheses as (r/p/w). These cycles are included in the total clock cycle number.
n—Number of Registers to Transfer
RL—Register List
*
†Add Calculate Effective Address Time
‡Add Calculate Immediate Address Time
MOTOROLA
Add Fetch Effective Address Time
†
‡
‡
‡
‡
*
*
EXG
MOVEC
MOVEC
MOVE
MOVE
MOVE
MOVE
MOVEM
MOVEM
MOVEP.W
MOVEP.L
MOVEP.W
MOVEP.L
MOVES
MOVES
MOVE
SWAP
Instruction
Ry,Rx
Cr,Rn
Rn,Cr
PSW,Rn
PSW,Mem
EA,CCR
EA,SR
EA,RL
RL,EA
Dn,(d
Dn,(d
(d
(d
EA,Rn
Rn,EA
USP
Rx,Ry
16
16
,An),Dn
,An),Dn
16
16
,An)
,An)
M68020 USER’S MANUAL
8 + 4n (n/0/0)
4 + 3n (0/0/n)
Best Case
14(0/0/4)
10(2/0/0)
16(4/0/0)
0(0/0/0)
3(0/0/0)
9(0/0/0)
1(0/0/0)
5(0/0/1)
4(0/0/0)
8(0/0/0)
8(0/0/2)
7(1/0/0)
5(0/0/1)
0(0/0/0)
1(0/0/0)
8 + 4n (n/0/0)
4 + 3n (0/0/n)
Cache Case
12(0/0/0)
11(0/0/2)
17(0/0/4)
12(2/0/0)
18(4/0/0)
2(0/0/0)
6(0/0/0)
4(0/0/0)
5(0/0/1)
4(0/0/0)
8(0/0/0)
7(1/0/0)
5(0/0/1)
2(0/0/0)
4(0/0/0)
9 + 4n (n/1/0)
5 + 3n (0/1/n)
Worst Case
13(0/1/0)
11(0/2/0)
11(0/1/2)
17(0/1/4)
12(2/1/0)
18(4/1/0)
3(0/1/0)
7(0/1/0)
5(0/1/0)
7(0/1/1)
5(0/1/0)
8(1/1/0)
7(0/1/1)
3(0/1/0)
4(0/1/0)
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