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System Overview
3-19
Figure 3-1 Am186ER Microcontroller Address Bus—Normal Read and Write Operation
Figure 3-2 Am186ER Microcontroller—Read and Write with Address Bus Disable In Effect
CLKOUTA
t
1
t
2
t
3
t
4
AD15–AD0
(Read)
Data
AD15–AD0
(Write)
LCS or UCS
Address
DataAddress
Address
Phase
Data
Phase
A19–A0 Address
MCSx, PCSx
CLKOUTA
t
1
t
2
t
3
t
4
AD15–AD0
(Write)
Data
LCS, UCS
AD15–AD8
(Read)
AD7–AD0
(Read)
Address
Phase
Data
Data
Phase
Data
A19–A0 Address