Byte Read-Modify-Write Cycle—32-Bit Port (Tas Instruction) - Motorola MC68020 User Manual

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