Intel 8XC251SA User Manual page 215

Embedded microcontroller
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State 1
XTAL
ALE
RD#/PSEN#
A17/A16/P0
P2
Figure 13-6. External Data Read (Page Mode)
State 1
XTAL
ALE
WR#
A17/A16/P0
P2
Figure 13-7. External Data Write (Page Mode)
EXTERNAL MEMORY INTERFACE
State 2
A17/A16/A7:0
A15:8
State 2
A17/A16/A7:0
A15:8
State 3
D7:0
State 3
D7:0
A2811-04
A2810-03
13-7

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