Section 11 Local Bus State Controller (LBSC)
Rev.1.00 Dec. 13, 2005 Page 366 of 1286
REJ09B0158-0100
(2) Wait
Cycle
Control
Wait cycle insertion for the SRAM interface can be controlled by CSnWCR. If the IW bits for
each area in CSnWCR is not 0, a software wait is inserted in accordance with the wait-control bits.
For details, see section 11.4.4, CSn Wait Control Register (CSnWCR).
A specified number of Tw cycles is inserted as wait cycles in accordance with the CSnWCR
setting. The insertion timing of the wait cycle is shown in figure 11.8.
T
1
CLKOUT
A25 to A0
CSn
R/
W
RD
D31 to D0
(read)
WE
D31 to D0
(write)
BS
T
w
T
2
RDY
DACK
Figure 11.8 SRAM Interface Wait Timing (Software Wait Only)
Содержание SH7780 Series
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