Section 10
Direct Memory Access Controller (DMAC)
Rev. 0.50 May 18, 2006 Page 383 of 1588
REJ09B0313-0050
Bit Bit
Name
Initial
Value
R/W Description
20
TEMASK
0
R/W
TE Set Mask
Specifies that DMA transfer does not stop even if the
TE bit is set to 1. If this bit is set to 1 along with the bit
for SAR/DAR reload function, DMA transfer can be
performed until the transfer request is cancelled.
In auto request mode or when a rising/falling edge of
the DREQ signal is detected in external request mode,
the setting of this bit is ignored and DMA transfer stops
if the TE bit is set to 1.
Note that this function is enabled only when either the
RLDSAR bit or the RLDDAR bit is set to 1.
0: DMA transfer stops if the TE bit is set
1: DMA transfer does not stop even if the TE bit is set
19 HE
0 R/(W)
*
Half-End Flag
This bit is set to 1 when the transfer count reaches half
of the DMATCR value that was specified before
transfer starts.
If DMA transfer ends because of an NMI interrupt, a
DMA address error, or clearing of the DE bit or the
DME bit in DMAOR before the transfer count reaches
half of the initial DMATCR value, the HE bit is not set
to 1. If DMA transfer ends due to an NMI interrupt, a
DMA address error, or clearing of the DE bit or the
DME bit in DMAOR after the HE bit is set to 1, the bit
remains set to 1.
To clear the HE bit, write 0 to it after HE = 1 is read.
0: DMATCR > (DMATCR set before transfer starts)/2
during DMA transfer or after DMA transfer is
terminated
[Clearing condition]
•
Writing 0 after reading HE = 1.
1: DMATCR
≤
(DMATCR set before transfer starts)/2
Содержание Single-Chip Microcomputer SH7203
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Страница 98: ...Section 2 CPU Rev 0 50 May 18 2006 Page 68 of 1588 REJ09B0313 0050 ...
Страница 128: ...Section 4 Clock Pulse Generator CPG Rev 0 50 May 18 2006 Page 98 of 1588 REJ09B0313 0050 ...
Страница 200: ...Section 6 Interrupt Controller INTC Rev 0 50 May 18 2006 Page 170 of 1588 REJ09B0313 0050 ...
Страница 242: ...Section 8 Cache Rev 0 50 May 18 2006 Page 212 of 1588 REJ09B0313 0050 ...
Страница 400: ...Section 9 Bus State Controller BSC Rev 0 50 May 18 2006 Page 370 of 1588 REJ09B0313 0050 ...
Страница 668: ...Section 11 Multi Function Timer Pulse Unit 2 MTU2 Rev 0 50 May 18 2006 Page 638 of 1588 REJ09B0313 0050 ...
Страница 696: ...Section 13 Watchdog Timer WDT Rev 0 50 May 18 2006 Page 666 of 1588 REJ09B0313 0050 ...
Страница 726: ...Section 14 Realtime Clock RTC Rev 0 50 May 18 2006 Page 696 of 1588 REJ09B0313 0050 ...
Страница 796: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 0 50 May 18 2006 Page 766 of 1588 REJ09B0313 0050 ...
Страница 876: ...Section 17 I2 C Bus Interface 3 IIC3 Rev 0 50 May 18 2006 Page 846 of 1588 REJ09B0313 0050 ...
Страница 1020: ...Section 19 Controller Area Network RCAN TL1 Rev 0 50 May 18 2006 Page 990 of 1588 REJ09B0313 0050 ...
Страница 1054: ...Section 21 D A Converter DAC Rev 0 50 May 18 2006 Page 1024 of 1588 REJ09B0313 0050 ...
Страница 1226: ...Section 23 USB 2 0 Host Function Module USB Rev 0 50 May 18 2006 Page 1196 of 1588 REJ09B0313 0050 ...
Страница 1294: ...Section 24 LCD Controller LCDC Rev 0 50 May 18 2006 Page 1264 of 1588 REJ09B0313 0050 ...
Страница 1386: ...Section 26 I O Ports Rev 0 50 May 18 2006 Page 1356 of 1588 REJ09B0313 0050 ...
Страница 1512: ...Section 30 List of Registers Rev 0 50 May 18 2006 Page 1482 of 1588 REJ09B0313 0050 ...
Страница 1598: ...Section 31 Electrical Characteristics Rev 0 50 May 18 2006 Page 1568 of 1588 REJ09B0313 0050 ...
Страница 1606: ...Appendix Rev 0 50 May 18 2006 Page 1576 of 1588 REJ09B0313 0050 ...
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