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H8SX/1663 데이터시트(PDF) 409 Page - Renesas Technology Corp

부품명 H8SX/1663
상세설명  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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Section 7 DMA Controller (DMAC)
Rev.1.00 Jun. 07, 2006 Page 357 of 1102
REJ09B0294-0100
Figure 7.15 shows an example of the extended repeat area operation.
External memory
When the area represented by the lower three bits of DSAR (eight bytes)
is specified as the extended repeat area (SARA4 to SARA0 = B'00011)
Repeat
An interrupt request by extended repeat area
overflow can be generated.
Area specified
by DSAR
H'23FFFE
H'23FFFF
H'240000
H'240001
H'240002
H'240003
H'240004
H'240005
H'240006
H'240007
H'240008
H'240009
H'240000
H'240001
H'240002
H'240003
H'240004
H'240005
H'240006
H'240007
Figure 7.15 Example of Extended Repeat Area Operation
When an interrupt by an extended repeat area overflow is used in block transfer mode, the
following should be taken into consideration.
When a transfer is stopped by an interrupt by an extended repeat area overflow, the address
register must be set so that the block size is a power of 2 or the block size boundary is aligned with
the extended repeat area boundary. When an overflow on the extended repeat area occurs during a
transfer of one block, the interrupt by the overflow is suspended and the transfer overruns.



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