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Figure 5.3 Memory expansion mode and microprocessor mode (with wait, multiplex bus)
VCC = 5 V
Memory expansion mode and microprocessor mode
(with wait, accessing external memory area and using multiplex bus)
Read timing
BCLK
ALE
ADi
DBi
Write timing
BCLK
ALE
CSi
CSi
WR, WRL,
WRH
Conditions:
• V
CC =5 V
• Input timing voltage: VIL = 0.8 V, VIH = 2.5 V
• Output timing voltage: VOL = 0.8 V, VOH = 2.0 V
ADi
BHI
RD
ADi
DBi
ADi
BHI