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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 308 of 982
REJ09B0023-0400
Bit Bit
Name
Initial
Value R/W Description
9
0
R
Reserved
This bit is always read as 0. The write value should
always be 0.
8
7
A3CL1
A3CL0
1
0
R/W
R/W
CAS Latency for Area 3
Specify the CAS latency for area 3.
00: 1 cycle
01: 2 cycles
10: 3 cycles
11: 4 cycles
6, 5
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
4
3
TRWL1
*
TRWL0
0
0
R/W
R/W
Number of Auto-Precharge Startup Wait Cycles
Specify the number of minimum precharge startup wait
cycles during the periods shown below.
•
From issuing of the WRITA command by this LSI to
starting of auto-precharge in SDRAM
The number of cycles from issuing the WRITA
command to issuing the ACTV command for the
same bank. See the SDRAM data sheets to
confirm the number of cycles precede issuing of
auto-precharge after the SDRAM has received the
WRITA command. Set these bits so that the
confirmed cycles should be equal to or less than
the cycles specified by these bits.
•
From issuing of the WRIT command by this LSI to
issuing of the PRE command
When different row addresses are accessed from
the same bank address in bank-active mode
The setting for areas 2 and 3 is common.
00: No cycle (Initial value)
01: 1 cycle
10: 2 cycles
11: 3 cycles
Содержание HD6417641
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Страница 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Страница 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Страница 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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Страница 1036: ...SH7641 Hardware Manual...