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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 372 of 982
REJ09B0023-0400
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Setting for Area 3
Burst read/single write (burst length 1):
Data Bus Width
CAS Latency
Access Address
External Address Pin
16 bits
2
H'A4FD5440
H'0000440
3
H'A4FD5460
H'0000460
32 bits
2
H'A4FD5880
H'0000880
3
H'A4FD58C0
H'00008C0
Burst read/burst write (burst length 1):
Data Bus Width
CAS Latency
Access Address
External Address Pin
16 bits
2
H'A4FD5040
H'0000040
3
H'A4FD5060
H'0000060
32 bits
2
H'A4FD5080
H'0000080
3
H'A4FD50C0
H'00000C0
Mode register setting timing is shown in figure 12.33. A PALL command (all bank pre-charge
command) is firstly issued. A REF command (auto refresh command) is then issued 8 times. An
MRS command (mode register write command) is finally issued. Idle cycles, of which number is
specified by the WTRP1 and WTRP0 bits in CS3WCR, are inserted between the PALL and the
first REF. Idle cycles, of which number is specified by the WTRC1 and WTRC0 bits in CS3WCR,
are inserted between REF and REF, and between the 8th REF and MRS. Idle cycles, of which
number is one or more, are inserted between the MRS and a command to be issued next.
It is necessary to keep idle time of certain cycles for SDRAM before issuing PALL command after
power-on. Refer the manual of the SDRAM for the idle time to be needed. When the pulse width
of the reset signal is longer then the idle time, mode register setting can be started immediately
after the reset, but care should be taken when the pulse width of the reset signal is shorter than the
idle time.
Содержание HD6417641
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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...