Section 11 Direct Memory Access Controller (DMAC)
Rev. 2.00 Mar 09, 2006 page 470 of 906
REJ09B0292-0200
Bit 7—Acknowledge Level Bit (AL): Selects whether the DACKn signal is an active-high signal
or an active-low signal. The AL bit is initialized to 0 by a reset and in standby mode. Its value is
retained during a module standby.
Bit 7: AL
Description
0
DACKn is an active-low signal
(Initial value)
1
DACKn is an active-high signal
Bit 6—DREQn Select Bit (DS): Selects the DREQn input detection used. When 0 (level detection)
is set to bit DS, set 0 (cycle-steal mode) to the transfer bus mode bit (TB). When 0 is set to bit DS
and 1 (burst mode) is set to bit TB, system operations are not guaranteed. The DS bit is initialized
to 0 by a reset and in standby mode. Its value is retained during a module standby.
Bit 6: DS
Description
0
Detected by level
(Initial value)
Can be set only in cycle-steal mode
1
Detected by edge
Bit 5—DREQn Level Bit (DL): Selects the DREQn input detection level. The DL bit is initialized
to 0 by a reset and in standby mode. Its value is retained during a module standby.
Bit 5: DL
Description
0
When DS is 0, DREQ is detected by low level; when DS is 1, DREQ is
detected at falling edge
(Initial value)
1
When DS is 0, DREQ is detected by high level; when DS is 1, DREQ is
detected at rising edge
Bit 4—Transfer Bus Mode Bit (TB): Selects the bus mode for DMA transfers. When 1 (burst
mode) is set to bit TB, set 1 (edge detection) to the DREQ select bit (DS). When 1 is set to bit TB
and 0 (level detection) is set to bit DS, system operations are not guaranteed. The TB bit is
initialized to 0 by a reset and in standby mode. Its value is retained during a module standby.
Bit 4: TB
Description
0
Cycle-steal mode
(Initial value)
1
Burst mode
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 ...