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H8S/2225 数据表(PDF) 271 Page - Renesas Technology Corp

部件名 H8S/2225
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  1071 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2225 数据表(HTML) 271 Page - Renesas Technology Corp

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Section 7 Bus Controller
Rev. 5.00 Aug 08, 2006 page 185 of 982
REJ09B0054-0500
16-Bit 2-State Access Space: Figures 7.12 to 7.14 show bus timings for a 16-bit 2-state access
space. When a 16-bit access space is accessed, the upper half (D15 to D8) of the data bus is used
for the even address, and the lower half (D7 to D0) for the odd address.
Wait states cannot be inserted.
Bus cycle
T1
T2
Address bus
φ
CSn
AS
RD
D15 to D8
Valid
D7 to D0
Invalid
Read
HWR
LWR
D15 to D8
Valid
D7 to D0
Write
High
Note: n = 7 to 0
High impedance
Figure 7.12 Bus Timing for 16-Bit 2-State Access Space (1) (Even Address Byte Access)



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