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H8S/2240 数据表(PDF) 199 Page - Renesas Technology Corp

部件名 H8S/2240
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 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/2240 数据表(HTML) 199 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev.3.00 Mar. 26, 2007 Page 157 of 772
REJ09B0355-0300
(2) 8-Bit 3-State Access Space
Figure 6.11 shows the bus timing for an 8-bit 3-state access space. When an 8-bit access space is
accessed, the upper half (D
15 to D8) of the data bus is used.
The
LWR pin is fixed high. Wait states can 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
High impedance
Write
High
Note: n = 0 to 3
T3
Figure 6.11 Bus Timing for 8-Bit 3-State Access Space



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