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H8S/2225 数据表(PDF) 282 Page - Renesas Technology Corp

部件名 H8S/2225
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  1071 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2225 数据表(HTML) 282 Page - Renesas Technology Corp

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Section 7 Bus Controller
Rev. 5.00 Aug 08, 2006 page 196 of 982
REJ09B0054-0500
T1
T2
T3
T1
T2
T1
T2
T3
TI
T1
T2
Address bus
φφ
Bus cycle A
Bus cycle B
(a) Idle cycle not inserted
(ICIS1 = 0)
Possibility of overlap between
CS (area B) and RD
Address bus
Bus cycle A
Bus cycle B
(b) Idle cycle inserted
(Initial value ICIS1 = 1)
CS (area A)
CS (area B)
RD
RD
CS (area A)
CS (area B)
Figure 7.23 Relationship between Chip Select (
CS
CS
CS
CS) and Read (RD
RD
RD
RD)
Table 7.4 shows pin states in an idle cycle.
Table 7.4
Pin States in Idle Cycle
Pins
Pin State
A23 to A0
Contents of next bus cycle
D15 to D0
High impedance
CSn
High
AS
High
RD
High
HWR
High
LWR
High



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