Section 11 Direct Memory Access Controller (DMAC)
Rev. 2.00 Mar 09, 2006 page 501 of 906
REJ09B0292-0200
When external memory is set as bank active synchronous DRAM, during a burst read the
acknowledge signal is output across the read command, wait and read address when the row
address is the same as the previous address output (figure 11.22). When the row address is
different from the previous address, the acknowledge signal is output across the precharge, row
address, read command, wait and read address (figure 11.23).
Clock
DACKn
(Active high)
Address
bus
CPU
DMAC read (basic timing)
Read
command
Read 1
Read 2
Read 3
Read 4
Figure 11.22 DACKn Output in Synchronous DRAM Burst Read
(Bank Active, Same Row Address, AM = 0)
Clock
DACKn
(Active high)
Address
bus
CPU
DMAC read
(basic timing)
Pre-
charge
Read
command
Read 1 Read 2 Read 3 Read 4
Row
address
Figure 11.23 DACKn Output in Synchronous DRAM Burst Read
(Bank Active, Different Row Address, AM = 0)
Содержание SH7616
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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 ...