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HD6432142 Datasheet(PDF) 212 Page - Renesas Technology Corp

Part # HD6432142
Description  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1177 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432142 Datasheet(HTML) 212 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev. 4.00 Sep 27, 2006 page 168 of 1130
REJ09B0327-0400
16-Bit, 3-State Access Space
Figures 6.10 to 6.12 show the bus timing for 16-bit, 3-state access space. When 16-bit access
space is accessed, the upper data bus (D15 to D8) is used for even addresses and the lower data
bus (D7 to D0) for odd addresses.
Wait states can be inserted.
Bus cycle
T1
T2
Address bus
φ
AS/IOS (IOSE = 1)
AS/IOS (IOSE = 0)
RD
D15 to D8
Valid
D7 to D0
Invalid
Read
HWR
LWR
D15 to D8
Valid
D7 to D0
Undefined
Write
High
T3
Figure 6.10 16-Bit, 3-State Access Space Bus Timing (1)
(Even Address Byte Access)



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