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HD6432351 bảng dữ liệu(PDF) 264 Page - Renesas Technology Corp

tên linh kiện HD6432351
Giải thích chi tiết về linh kiện  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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HD6432351 bảng dữ liệu(HTML) 264 Page - Renesas Technology Corp

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Section 7 DMA Controller (DMAC)
Rev. 3.00 Sep 15, 2006 page 230 of 988
REJ09B0330-0300
Bit 0—Write Enable 0A (WE0A): Enables or disables writes to all bits in DMACR0A, and bits
8, 4, and 0 in DMABCR.
Bit 0
WE0A
Description
0
Writes to all bits in DMACR0A, and bits 8, 4, and 0 in DMABCR are disabled
(Initial value)
1
Writes to all bits in DMACR0A, and bits 8, 4, and 0 in DMABCR are enabled
Writes by the DTC to bits 15 to 12 (FAE and SAE) in DMABCR are invalid regardless of the
DMAWER settings. These bits should be changed, if necessary, by CPU processing.
In writes by the DTC to bits 7 to 4 (DTE) in DMABCR, 1 can be written without first reading 0.
To reactivate a channel set to full address mode, write 1 to both Write Enable A and Write Enable
B for the channel to be reactivated.
MAR, IOAR, and ETCR are always write-enabled regardless of the DMAWER settings. When
modifying these registers, the channel for which the modification is to be made should be halted.



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