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H8SX/1663R データシート(PDF) 540 Page - Renesas Technology Corp

部品番号 H8SX/1663R
部品情報  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
PDF  1504 Pages
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メーカー  RENESAS [Renesas Technology Corp]
ホームページ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8SX/1663R データシート(HTML) 540 Page - Renesas Technology Corp

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Section 11 EXDMA Controller (EXDMAC)
Rev. 2.00 Sep. 24, 2008 Page 508 of 1468
REJ09B0412-0200
(2)
Normal Transfer Mode (Burst Mode)
In burst mode, one-byte, one-word, or one-longword transfer is executed continuously until the
transfer end condition is satisfied.
Once burst transfer starts, requests from other channels, even of higher priority, are held pending
until burst transfer ends.
Figure 11.27 shows an example of transfer when
ETEND output is enabled, and word-size, normal
transfer mode (burst mode) is performed from external 16-bit, 2-state access space to external 16-
bit, 2-state access space.
EXDMA write
Address bus
EXDMA write
EXDMA read
B
φ
RD
LHWR, LLWR
ETEND
Bus
release
Bus
release
Last transfer cycle
Burst transfer
EXDMA read
EXDMA read
EXDMA write
Figure 11.27 Example of Normal Transfer Mode (Burst Mode) Transfer



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