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Section 12 Bus State Controller (BSC)
Rev. 4.00 Sep. 14, 2005 Page 388 of 982
REJ09B0023-0400
6. Data output from an external device caused by DMA single address transfer is followed by
data output from another device that includes this LSI (DMAIWA = 0)
For details, see the description of the DMAIWA bit in the CMNCR register.
7. Data output from an external device caused by DMA single address transfer is followed by any
type of access (DMAIWA = 1)
Besides the wait cycles between access cycles (idle cycles) described above, idle cycles must be
inserted to reserve the minimum pulse width for an interface with an internal bus and a
multiplexed pin (WEn).
8. Idle cycle of the external bus for the interface with the internal bus
A. Insert one idle cycle immediately before a write access cycle after an external bus idle
cycle or a read cycle.
B. Insert one idle cycle to transfer the read data to the internal bus when a read cycle of the
external bus terminates.
Insert two to three idle cycles including the idle cycle in A. for the write cycle immediately
after a read cycle.
9. Idle cycle of the external bus for accessing different memory
For accessing different memory, insert idle cycles as follows. The byte-selection SRAM
interface with the BAS bit = 1 specified is handled as an SDRAM interface because the WEn
change timing is identical.
A. Insert one idle cycle to access the interface other than the SDRAM interface after the write
access cycle is performed in the SDRAM interface.
B. Insert one idle cycle to access the SDRAM interface after the normal space interface with
the external wait invalidated or the byte-selection SRAM interface with the BAS bit = 0
specified is accessed.
C. Insert one idle cycle to access the SDRAM interface after the MPX-IO interface is
accessed.
D. Insert one idle cycle to access the MPX-IO interface from the external bus that is in the idle
status.
E. Insert one idle cycle to access the MPX-IO interface after a read cycle is performed in the
normal space interface, byte-selection SRAM interface with the BAS bit = 0 specified or
the SDRAM interface.
F. Insert two idle cycles to access the MPX-IO interface after a write cycle is performed in the
SDRAM interface.
G. Insert one idle cycle to access the SDRAM interface which is not in the low frequency
mode after the interface in the SDRAM low frequency mode (SDCR.SLOW = 1) is
accessed.
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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