Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 262 of 906
REJ09B0292-0200
Bits 11 to 8—Long Wait Specification for Areas 0 to 4 (AnLW2): When the basic memory
interface setting is made for CS n, from 3 to 14 wait cycles are inserted in CS n accesses,
according to the combination with the long wait specification bits (AnLW1 and AnLW0) in
BCR1, when the bits specifying the wait in the wait control register are set as long wait (i.e., are
set to 11). For a basic description of long waits, see section 7.2.1, Bus Control Register 1 (BCR1).
Bits 7 and 6—DMA Single-Write Wait (DSWW1, DSWW0): These bits determine the number of
wait states inserted between DACK assertion and
CASn
assertion when writing to DRAM or EDO
RAM in DMA single address mode.
Bit 7: DSWW1
Bit 6: DSWW0
Description
0
0
0 waits
(Initial value)
1
1 wait
1
0
2 waits
1
Reserved (do not set)
Bits 5 to 3—Reserved bits: These bits are always read as 0. The write value should always be 0.
Bit 2—Number of Banks Specification when Using 64M Synchronous DRAM (BASEL): When
64M synchronous DRAM is specified by AMX2–AMX0 in MCR, the number of banks can be
specified.
Bit 2: BASEL
Description
0
4 banks
(Initial value)
1
2 banks
Bit 1—EDO Mode Specification (EDO): Enables EDO mode to be specified when DRAM is
specified for CS3 space.
Bit 1: EDO
Description
0
High-speed page mode
(Initial value)
1
EDO mode
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 ...