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HD64F2149YV Datasheet(PDF) 192 Page - Renesas Technology Corp

Part # HD64F2149YV
Description  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1075 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F2149YV Datasheet(HTML) 192 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev. 3.00 Jan 18, 2006 page 164 of 1044
REJ09B0280-0300
T1
Address bus
φ
RD
Bus cycle A
Data bus
T2
T3
T1
T2
Bus cycle B
Long output
floating time
Data collision
(a) Idle cycle not inserted
T1
φ
RD
T2
T3
TI
T1
(b) Idle cycle inserted
T2
HWR, LWR
HWR, LWR
Address bus
Data bus
Bus cycle A
Bus cycle B
Figure 6.15 Example of Idle Cycle Operation
6.6.2
Pin States in Idle Cycle
Table 6.5 shows pin states in an idle cycle.
Table 6.5
Pin States in Idle Cycle
Pins
Pin State
A23 to A0,
IOS
Contents of next bus cycle
D15 to D0
High impedance
AS
High
RD
High
HWR, LWR
High



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