MC68020 Datasheet, PDF (243/306 Pages) Motorola, Inc – MICROPROCESSORS USERS MANUAL

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.
Instruction
EXG
Ry,Rx
MOVEC
Cr,Rn
MOVEC
Rn,Cr
MOVE
PSW,Rn
† MOVE
PSW,Mem
* MOVE
EA,CCR
* MOVE
EA,SR
‡ MOVEM
EA,RL
‡ MOVEM
RL,EA
MOVEP.W
MOVEP.L
MOVEP.W
MOVEP.L
‡ MOVES
Dn,(d ₁₆ ,An)
Dn,(d ₁₆ ,An)
(d ₁₆ ,An),Dn
(d ₁₆ ,An),Dn
EA,Rn
‡ MOVES
Rn,EA
MOVE
USP
SWAP
Rx,Ry
n—Number of Registers to Transfer
RL—Register List
*Add Fetch Effective Address Time
†Add Calculate Effective Address Time
‡Add Calculate Immediate Address Time
Best Case
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 + 4n (n/0/0)
4 + 3n (0/0/n)
8(0/0/2)
14(0/0/4)
10(2/0/0)
16(4/0/0)
7(1/0/0)
5(0/0/1)
0(0/0/0)
1(0/0/0)
Cache Case
2(0/0/0)
6(0/0/0)
12(0/0/0)
4(0/0/0)
5(0/0/1)
4(0/0/0)
8(0/0/0)
8 + 4n (n/0/0)
4 + 3n (0/0/n)
11(0/0/2)
17(0/0/4)
12(2/0/0)
18(4/0/0)
7(1/0/0)
5(0/0/1)
2(0/0/0)
4(0/0/0)
Worst Case
3(0/1/0)
7(0/1/0)
13(0/1/0)
5(0/1/0)
7(0/1/1)
5(0/1/0)
11(0/2/0)
9 + 4n (n/1/0)
5 + 3n (0/1/n)
11(0/1/2)
17(0/1/4)
12(2/1/0)
18(4/1/0)
8(1/1/0)
7(0/1/1)
3(0/1/0)
4(0/1/0)
MOTOROLA
M68020 USER’S MANUAL
8-29