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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 336 of 982
REJ09B0023-0400
Figures 12.15 to 12.17 show examples of the connection of the SDRAM with the LSI.
As shown in figure 12.17, two sets of SDRAMs of 32 Mbytes or smaller can be connected to the
same CS space by using
RASU
,
RASL
,
CASU
, and
CASL
. In this case, a total of 8 banks are
assigned to the same CS space: 4 banks specified by
RASL
and
CASL
, and 4 banks specified by
RAS
and
CAS
. When accessing the address with A25 = 0,
RASL
and
CASL
are asserted. When
accessing the address with A25 = 1,
RASU
and
CASU
are asserted.
A15
A2
CKE
CKIO
CSn
RASU
CASU
RASL
CASL
RD/
WR
D31
D16
DQMUU
DQMUL
D15
D0
DQMLU
DQMLL
64M SDRAM
(1M
×
16-bit
×
4-bank)
. . .
A13
A0
CKE
CLK
CS
RAS
CAS
WE
I/O15
I/O0
DQMU
DQML
. . .
. . .
. . .
. . .
A13
A0
CKE
CLK
CS
RAS
CAS
WE
I/O15
I/O0
DQMU
DQML
. . .
. . .
This LSI
Unused
Unused
Figure 12.15 Example of 32-Bit Data Width SDRAM Connection
(
RASU
and
CASU
are Not Used)
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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Page 1036: ...SH7641 Hardware Manual...