Motorola MC68020 User Manual page 105

S0
CLK
*
A31–A20
A19–A16
A15–A2
A1–A0
FC2–FC0
SIZ1
SIZ0
R/W
**
ECS
**
OCS
AS
DS
DSACK1
DSACK0
**
DBEN
D31–D24
D23–D16
D15–D8
D7–D0
BERR
HALT
*
For the MC68EC020, A23–A20.
**
This signal does not apply to the MC68EC020.
MOTOROLA
S2 S4 S0
READ CYCLE
Figure 5-38. Bus Error without
M68020 USER'S MANUAL
S2 S4
(0000)
BREAKPOINT ENCODING
BREAKPOINT NUMBER
CPU SPACE
WORD
BREAKPOINT
ACKNOWLEDGE
BUS ERROR
FETCH
DSACK1/DSACK0
S0 S2
EXCEPTION
STACKING
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