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SH7052 Datasheet(PDF) 159 Page - Renesas Technology Corp

Part # SH7052
Description  SuperHTM RISC engine
PDF  919 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7052 Datasheet(HTML) 159 Page - Renesas Technology Corp

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133
8.3.3
CS Assert Period Extension
Idle cycles can be inserted to prevent extension of the
RD, WRH, or WRL signal assert period
beyond the length of the
CSn signal assert period by setting the SW3 to SW0 bits of BCR2. This
allows for flexible interfaces with external circuitry. The timing is shown in figure 8.6. Th and Tf
cycles are added respectively before and after the ordinary cycle. Only
CSn is asserted in these
cycles;
RD, WRH, and WRL signals are not. Further, data is extended up to the T
f cycle, which is
effective for gate arrays and the like, which have slower write operations.
Th
T1
CK
Read
Write
Address
CSn
RD
Data
WRH, WRL
Data
T2
Tf
Figure 8.6
CS Assert Period Extension Function



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