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M32C/8A 数据表(PDF) 77 Page - Renesas Technology Corp

部件名 M32C/8A
功能描述  RENESAS MCU M16C FAMILY / M32C/80 Series
PDF  372 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

M32C/8A 数据表(HTML) 77 Page - Renesas Technology Corp

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M32C/8A Group
8. Bus
Rev.1.00
Jul 15, 2007
Page 60 of 352
REJ09B0385-0100
Figure 8.7
Bus Cycles when Multiplexed Bus is Selected (1)
1 bus cycle = 6 φ
1 bus cycle = 7 φ
RD
RD
• Bus cycle 2 φ
+ 2 φ
BCLK
CSi
Read data
Write data
RD
• Bus cycle 2 φ
+ 3 φ
• Bus cycle 2 φ
+ 5 φ
ALE
BCLK
CSi
Read data
Write data
RD
ALE
BCLK
CSi
Read data
Write data
RD
ALE
(1)
(1)
(1)
?Bus cycle 3 φ + 3 φ
BCLK
CSi
Read data
Write data
RD
ALE
(1)
LA
LA
1 bus cycle = 4
φ
WD
LA
LA
WD
LA
LA
i=0 to 3
LA
LA
RD
WD
RD
WD
WR (WRL)
WR (WRL)
WR (WRL)
WR (WRL)
1 bus cycle = 5 φ
LA: Latch address
RD: Read data
WD: Write data
NOTE:
1. When the MCU accesses the same CS area consecutively, the CSi pin keeps outputting "L".



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