Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 290 of 906
REJ09B0292-0200
For the CS0–CS3 spaces,
CSn
,
RD
, and
WEn
are negated for one cycle after negation of the
external wait signal is accepted, as shown in figure 7.17. For the CS4 space, the number of cycles
before
CSn
,
RD
, and
WEn
are negated after acceptance of external wait negation can be set as 1,
2, or 4 by means of bits A4WD1 and A4WD0 in WCR2. Figure 7.18 shows an example.
T1
Tw
CKIO
A24–A0
CSn
RD/
WR
RD
D15–D0
WEn
D15–D0
WAIT
BS
DACKn
*
Read
Write
Twx
Twx
T2
Specified by A4WD1 and
A4WD0 in WCR2
(A4WD1, A4WD0 = 01)
Note:
*
DACKn waveform when active-low is specified.
Figure 7.18 Wait State Timing of Ordinary Space in CS4 Space
Содержание SH7616
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Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...