Section 7 Bus State Controller (BSC)
Rev. 2.00 Mar 09, 2006 page 271 of 906
REJ09B0292-0200
Bit 9—Bank Active Mode (RASD)
Bit 9: RASD
Description
0
For DRAM,
RAS
is negated after access ends (normal operation)
For synchronous DRAM, a read or write is performed using auto-precharge
mode
.
The next access always starts with a bank active command
(Initial value)
1
For DRAM, after access ends
RAS
down mode is entered in which RAS is left
asserted. When using this mode with an external device connected which
performs writes other than to DRAM, see section 7.6.5, Burst Access
For synchronous DRAM, access ends in the bank active state. This is only
valid for area 3. When area 2 is synchronous DRAM, the mode is always auto-
precharge
Bits 7, 5, and 4—Address Multiplex (AMX2–AMX0)
•
For DRAM interface
Bit 7: AMX2
Bit 5: AMX1
Bit 4: AMX0
Description
0
0
0
8-bit column address DRAM
1
9-bit column address DRAM
1
0
10-bit column address DRAM
1
11-bit column address DRAM
1
0
0
Reserved (do not set)
1
Reserved (do not set)
1
0
Reserved (do not set)
1
Reserved (do not set)
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 ...