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HD6432351 데이터시트(PDF) 284 Page - Renesas Technology Corp

부품명 HD6432351
상세설명  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432351 데이터시트(HTML) 284 Page - Renesas Technology Corp

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Section 7 DMA Controller (DMAC)
Rev. 3.00 Sep 15, 2006 page 250 of 988
REJ09B0330-0300
Figure 7.11 illustrates operation in normal mode.
Address TA
Address BA
Transfer
Address TB
Notes:
Address
Address
Address
Address
Where :
Address BB
= LA
= LB
= LA + SAIDE • (–1)SAID • (2DTSZ • (N–1))
= LB + DAIDE • (–1)DAID • (2DTSZ • (N–1))
= Value set in MARA
= Value set in MARB
= Value set in ETCRA
TA
TB
BA
BB
LA
LB
N
Figure 7.11 Operation in Normal Mode
Transfer requests (activation sources) are external requests and auto-requests.
With auto-request, the DMAC is only activated by register setting, and the specified number of
transfers are performed automatically. With auto-request, cycle steal mode or burst mode can be
selected. In cycle steal mode, the bus is released to another bus master each time a transfer is
performed. In burst mode, the bus is held continuously until transfer ends.



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