Section 11 Direct Memory Access Controller (DMAC)
Rev. 2.00 Mar 09, 2006 page 497 of 906
REJ09B0292-0200
Clock
DACKn
(Active high)
Address
bus
CPU
DMAC
read
DMAC
write
Invalid
write
CPU
0.5 cycles
DMAC read
T
1
T
W
T
2
Basic timing
1 wait inserted
Figure 11.14 DACKn Output in Ordinary Space Accesses (AM = 0)
Clock
DACKn
(Active high)
Address
bus
DMAC
read
DMAC
write
Invalid
write
Invalid
write
CPU
DMAC read
Basic timing
1 wait inserted
DMAC write
Figure 11.15 DACKn Output in Ordinary Space Accesses (AM = 1)
In a longword access of a 16-bit external device (figure 11.16) or an 8-bit external device (figure
11.17), or a word access of an 8-bit external device (figure 11.18), the lower and upper addresses
are output 2 and 4 times in each DMAC access in order to align the data. For all of these
addresses, the acknowledge signal becomes valid simultaneous with the start of output and the
signal becomes invalid 0.5 cycles before the address output ends. When multiple addresses are
output in a single access to align data for synchronous DRAM, DRAM, or burst ROM, an
acknowledge signal is output to those addresses as well.
Содержание SH7616
Страница 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
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 ...