Intel 8XC251SA User Manual page 222

Embedded microcontroller
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8XC251SA, SB, SP, SQ USER'S MANUAL
WCLK
ALE
RD#/PSEN#
WAIT#
P2
P0
Figure 13-14. External Data Read (Page Mode, RT Wait State)
WCLK
ALE
WR#
WAIT#
P2
A8-A15
P0
Figure 13-15. External Data Write (Page Mode, RT Wait State)
13-14
State 1
State 2
A8-A15
D0-D7
A0-A7
State 1
State 2
A0-A7
State 3
RD#/PSEN#
stretched
stretched
State 3
WR# stretched
D0-D7
State 1 (next cycle)
stretched
A8-A15
A0-A7
A5008-01
State 4
stretched
stretched
A5010-01

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