Motorola MC68020 - Byte Read-Modify-Write Cycle-32-Bit Port (TAS Instruction)

MOTOROLA M68020 USER’S MANUAL 5- 41
INDIVISIBLE CYCLE
NEXT CYCLE
CLK
A31–A2
A1
A0
FC2–FC0
SIZ1
R/W
AS
DS
DSACK0
DBEN
D31–D24
SIZ0
DSACK1
S0
S2
S4
Si
S6
S8
S10
S0
D7–D0
D23–D16
RMC
ECS
OP3
OP3
OP3
OP3
OP3
BERR
HALT
BG
D15–8
S11
**
**
**
*
*
For the MC68EC020, A23–A2.
This signal does not apply to the MC68EC020.
**
Si
OCS
Figure 5-30. Byte Read-Modify-Write Cycle—32-Bit Port (TAS Instruction)