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H8/3028F 数据表(PDF) 171 Page - Renesas Technology Corp

部件名 H8/3028F
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8/3028F 数据表(HTML) 171 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 141 of 890
6.4.5
Basic Bus Control Signal Timing
8-Bit, Three-State-Access Areas
Figure 6.9 shows the timing of bus control signals for an 8-bit, three-state-access area. The upper
data bus (D15 to D8) is used in accesses to these areas. The LWR pin is always high. Wait states
can be inserted.
Bus cycle
External address in area n
Valid
Invalid
Valid
Undetermined data
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
Figure 6.9 Bus Control Signal Timing for 8-Bit, Three-State-Access Area



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