Motorola MC68020 User Manual

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

Motorola MC68020 Specifications

General

Brand	Motorola
Model	MC68020
Category	Computer Hardware
Language	English