
MOTOROLA
M68020 USER’S MANUAL
5- 57
BREAKPOINT
ACKNOWLEDGE
BUS ERROR
FETCH
READ CYCLE
CLK
A31–A20
A19–A16
A15–A2
FC2–FC0
SIZ1
R/W
ECS
OCS
AS
DS
DSACK0
DBEN
D23–D16
SIZ0
DSACK1
S0
S2
S4
S0
S2
S4
S0
S2
D7–D0
D15–D8
BREAKPOINT NUMBER
WORD
EXCEPTION
STACKING
(0000)
BREAKPOINT ENCODING
A1–A0
HALT
BERR
CPU SPACE
D31–D24
**
*
* For the MC68EC020, A23–A20.
This signal does not apply to the MC68EC020.
**
Figure 5-38. Bus Error without
DSACK1/DSACK0
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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