Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 264 of 906
REJ09B0292-0200
Bits 7 to 0—Wait Control for Areas 3 to 0 (W31–W00)
•
When the CSn space is set as ordinary space, the number of CSn space waits can be specified
with Wn1 and Wn0.
W31, W21,
W11, W01
W30, W20,
W10, W00
Description
0
0
External wait input disabled without wait
1
External wait input enabled with one wait
1
0
External wait input enabled with two waits
1
Complies with the long wait specification of bus control
register 1, 3 (BCR1, BCR3). External wait input is enabled
(Initial value)
•
When CS3 is DRAM, the number of
CAS
assert cycles is specified by wait control bits W31
and W30
Bit 7: W31
Bit 6: W30
Description
0
0
1 cycle
1
2 cycles
1
0
3 cycles
1
Reserved (do not set)
When external wait mask bit A3WM in WCR2 is 0 and the number of
CAS
assert cycles is set
to 2 or more, external wait input is enabled.
•
When CS2 or CS3 is synchronous DRAM, CAS latency is specified by wait control bits W31
and W30, and W21 and W20, respectively
W31, W21
W30, W20
Description
0
0
1 cycle
1
2 cycles
1
0
3 cycles
1
4 cycles
(Initial value)
With synchronous DRAM, external wait input is ignored regardless of any setting.
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
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 ...