R01UH0136EJ0210 Rev.2.10
Page 152 of 800
Jul 31, 2012
M16C/64A Group
11. Bus
Figure 11.7
Typical Bus Timings Using Software Wait States (2/2)
WD
WD
A
RD
Bus cycle = 4
φ
Bus cycle = 4
φ
(1) Separate Bus, Three Wait States (1
φ
+ 3
φ
)
RD
Address/Data
CSi
Address
ALE
(3) Multiplexed Bus, Three Wait States (1
φ
+ 3
φ
)
Bus cycle = 4
φ
Bus cycle = 4
φ
RD
A
Address/Data
RD
ALE
Bus cycle = 3
φ
(2) Multiplexed Bus, One or Two Wait States (1
φ
+ 2
φ
)
Bus cycle = 3
φ
BCLK
CSi
BCLK
CSi
BCLK
RD
Data
Address
RD
A
A
A
WD
(Note 1)
(Note 1)
A
A
Note:
1. When consecutively accessing the same chip-select area, CSi continues outputting a low level.
i = 0 to 3
A: Address RD: Read data (input) WD: Write data (output)
(Note 1)
A
A
A
Address
WR
,
WRL
,
WRH
WR
,
WRL
,
WRH
WR
,
WRL
,
WRH
Содержание M16C/60 Series
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