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H8S/2214 数据表(PDF) 288 Page - Renesas Technology Corp

部件名 H8S/2214
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  936 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2214 数据表(HTML) 288 Page - Renesas Technology Corp

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Section 7 DMA Controller
Rev.4.00 Sep. 18, 2008 Page 228 of 872
REJ09B0189-0400
Acquire bus
ETCRAL = ETCRAL – 1
Transfer request?
ETCRAL = H'00
Release bus
BLKDIR = 0
ETCRAL = ETCRAH
ETCRB = ETCRB – 1
ETCRB = H'0000
Start
(DTE = DTME = 1)
Read address specified by MARA
MARA = MARA + SAIDE · (–1)SAID · 2DTSZ
Write to address specified by MARB
MARB = MARB + DAIDE · (–1)DAID · 2DTSZ
MARB = MARB – DAIDE · (–1)DAID · 2DTSZ · ETCRAH
MARA = MARA – SAIDE · (–1)SAID · 2DTSZ · ETCRAH
No
Yes
No
Yes
No
Yes
No
Yes
Clear DTE bit to 0
to end transfer
Figure 7.13 Operation Flow in Block Transfer Mode
Transfer requests (activation sources) consist of external requests, SCI transmission complete and
reception complete interrupts, and TPU channel 0 to 2 compare match/input capture A interrupts.



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