Rev. 2.00, 09/03, page 193 of 690
When the WM bit in CSnWCR is cleared to 0, the external wait input
WAIT signal is also
sampled.
WAIT pin sampling is shown in figure 7.9. A 2-cycle wait is specified as a software
wait. The
WAIT signal is sampled on the falling edge of CKIO at the transition from the T
1
or Tw
cycle to the T
2
cycle.
T
1
CKIO
A25 to A0
CSn
RD/
WR
RD
Data
WEn
Data
WAIT
Tw
Tw
Twx
T
2
Read
Write
BS
Wait states inserted
by
WAIT
signal
DACKn
*
Note:
*
The waveform for DACKn is when active low is specified.
Figure 7.9 Wait State Timing for Normal Space Access
(Wait State Insertion by
WAIT Signal)
Содержание SH7705
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