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SH7014 Scheda tecnica(PDF) 158 Page - Renesas Technology Corp

Il numero della parte SH7014
Spiegazioni elettronici  32-Bit RISC Microcomputer
PDF  754 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7014 Scheda tecnica(HTML) 158 Page - Renesas Technology Corp

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8. Bus State Controller (BSC)
Rev.5.00 Sep. 27, 2007 Page 124 of 716
REJ09B0398-0500
8.3.2
Wait State Control
The number of wait states inserted into ordinary space access states can be controlled using the
WCR settings (figure 8.4). The specified number of Tw cycles are inserted as software wait cycles
at the timing shown in figure 8.4.
T1
TW
CK
Read
Write
Address
CSn
RD
Data
WRx
Data
T2
Figure 8.4 Wait Timing of Ordinary Space Access (Software Wait Only)
When the wait is specified by software using WCR, the wait input
WAIT signal from outside is
sampled. Figure 8.5 shows the
WAIT signal sampling. The WAIT signal is sampled at the clock
rise one cycle before the clock rise when T
w state shifts to T2 state.



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