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7643 bảng dữ liệu(PDF) 199 Page - Renesas Technology Corp

tên linh kiện 7643
Giải thích chi tiết về linh kiện  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  424 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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7643 bảng dữ liệu(HTML) 199 Page - Renesas Technology Corp

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Rev.2.00
Aug 28, 2006
page 78 of 202
7643 Group
REJ09B0133-0200
APPLICATION
2.5 DMAC
(3) DMAC channel x (x = 0, 1) mode register 2
•DMAC channel x software transfer trigger bit (DxSWT)
Writing “1” to the DxSWT bit can generate a transfer request as a software trigger. If all of
DMACx hardware transfer request source bits (DxHR) are “0”, the software trigger is only
transfer request factor. This bit is fixed to “0” at read.
•DMAC channel x transfer initiation source capture register reset bit (DxCRR)
Writing “1” to the DxCRR bit can reset the transfer initiation source capture register. The
request of the transfer initiation source is latched asynchronously and it is sampled into the
transfer initiation source capture register at a rising edge of
φ. This bit is fixed to “0” at read.
•DMAC channel x enable bit (DxCEN)
The DMAC channel x is enabled by setting this bit to “1”. When clearing this to “0”, the DMA
transfer is finished.



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