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Memory expansion and microprocessor modes
(with wait, accessing external memory area)
Read timing
BCLK
CSi
ADi
BHE
ALE
RD
DB
Write timing
BCLK
CSi
ADi
BHE
ALE
WR, WRL,
WRH
DB
Figure 5.2 Memory expansion and microprocessor modes (with wait)
Conditions:
• V
= 5 V
CC
• Input timing voltage: V
• Output timing voltage: V
( 56 / 76 )
= 0.8 V, V
= 2.5 V
IL
IH
= 0.8 V, V
= 2.0 V
OL
OH
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