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TMPR4937 데이터시트(PDF) 160 Page - Toshiba Semiconductor

부품명 TMPR4937
상세설명  64-Bit TX System RISC TX49 Family
PDF  552 Pages
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제조업체  TOSHIBA [Toshiba Semiconductor]
홈페이지  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMPR4937 데이터시트(HTML) 160 Page - Toshiba Semiconductor

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Chapter 8 DMA Controller
8-4
8.3
Detailed Explanation
8.3.1
Transfer Mode
The DMA Controller (DMAC0, DMAC1) supports five transfer mode types (refer to Table 8.3.1
below). The setting of the External Request bit (DMCCRn.EXTRQ) of the DMA Channel Control
Register selects whether transfer with an I/O device is a DMA transfer.
•
I/O DMA Transfer Mode (DMCCRn.EXTRQ = “1”)
Perform DMA transfer with either an external device connected to the External Bus Controller or
an on-chip I/O device (ACLC or SIO).
•
Memory Transfer Mode (DMCCRn.EXTRQ = “0”)
Either copies data between memory devices or fills data in memory.
Table 8.3.1 DMA Controller Transfer Modes
DMA
Controller
Transfer Mode
DMCCRn
EXTREQ
PCFG
DMASEL
DMCCRn
SNGAD
DMSAR
DMDAR
Ref.
External I/O
(Single Address)
1
0
1
√
⎯
8.3.3
8.3.7
External I/O
(Dual Address)
1
0
0
√
√
8.3.3
8.3.8
Internal I/O (SIO)
1
1
0
√
√
8.3.4
8.3.8
Memory-Memory Copy
0
⎯
0
√
√
8.3.4
8.3.8
DMAC0
Fill Memory
0
⎯
1
√
⎯
8.3.6
8.3.7
Internal I/O (ACLC)
1
⎯
0
√
√
8.3.4
8.3.8
Memory-Memory Copy
0
⎯
0
√
√
8.3.4
8.3.8
DMAC1
Fill Memory
0
⎯
1
√
⎯
8.3.6
8.3.7



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