SH7206 Datasheet, PDF (296/1188 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 8 Bus State Controller (BSC)
8.5.3 Access Wait Control
Wait cycle insertion on a normal space access can be controlled by the settings of bits WR3 to
WR0 in CSnWCR. It is possible for areas 1, 4, 5, 7, and 8 to insert wait cycles independently in
read access and in write access. Areas 0, 2, 3, and 6 have common access wait for read cycle and
write cycle. The specified number of Tw cycles are inserted as wait cycles in a normal space
access shown in figure 8.9.
T1
Tw
T2
Read
CKIO
A25 to A0
CSn
RD/WR
RD
D31 to D0
Write
WEn
D31 to D0
BS
DACKn*
Note: * The waveform for DACKn is when active low is specified.
Figure 8.9 Wait Timing for Normal Space Access (Software Wait Only)
Rev. 3.00 Jun. 18, 2008 Page 272 of 1160
REJ09B0191-0300