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HD6432351 Scheda tecnica(PDF) 186 Page - Renesas Technology Corp

Il numero della parte HD6432351
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432351 Scheda tecnica(HTML) 186 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev. 3.00 Sep 15, 2006 page 152 of 988
REJ09B0330-0300
8-Bit 3-State Access Space
Figure 6.7 shows the bus timing for an 8-bit 3-state access space. When an 8-bit access space is
accessed, the upper half (D15 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 7
T3
Figure 6.7 Bus Timing for 8-Bit 3-State Access Space



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