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H8/3028F Datasheet(PDF) 173 Page - Renesas Technology Corp

Part # H8/3028F
Description  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3028F Datasheet(HTML) 173 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 143 of 890
16-Bit, Three-State-Access Areas
Figures 6.11 to 6.13 show the timing of bus control signals for a 16-bit, three-state-access area. In
these areas, the upper data bus (D15 to D8) is used in accesses to even addresses and the lower data
bus (D7 to D0) in accesses to odd addresses. Wait states can be inserted.
Bus cycle
Even external address in area n
Valid
Invalid
Valid
High
φ
Address bus
CSn
AS
RD
D15 to D8
D7 to D0
HWR
LWR
D15 to D8
D7 to D0
Read access
Write access
Note: n = 7 to 0
T1
T2
T3
Undetermined data
Figure 6.11 Bus Control Signal Timing for 16-Bit, Three-State-Access Area (1)
(Byte Access to Even Address)



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