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Memory expansion and microprocessor modes
(with wait, accessing external memory area and using multiplex bus)
Read timing
BCLK
CSi
ADi
DBi
ADi
BHE
ALE
WR
Write timing
BCLK
CSi
ADi
DBi
ADi
BHE
ALE
WR, WRL,
WRH
Figure 5.3 Memory expansion and microprocessor modes (with wait, multiplex bus)
Conditions:
• V
= 5 V
CC
• Input timing voltage: V
• Output timing voltage: V
( 58 / 76 )
= 0.8 V, V
= 2.5 V
IL
IH
= 0.8 V, V
= 2.0 V
OL
OH
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