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H8S/2218 Scheda tecnica(PDF) 200 Page - Renesas Technology Corp

Il numero della parte H8S/2218
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  750 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2218 Scheda tecnica(HTML) 200 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev.6.00 Jun. 03, 2008 Page 152 of 698
REJ09B0074-0600
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 6.24 Relationship between Chip Select (
CS) and Read (RD)
Table 6.4 shows pin states in an idle cycle.
Table 6.4
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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