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TC1784
Direct Memory Access Controller (DMA)
User´s Manual
11-98
V1.1, 2011-05
DMA, V3.03
11.3.5
Channel Address Registers
The Source Address Register contains the 32-bit source address. If a DMA channel mn
is active, SADRmn is updated continuously (if programmed) and shows the actual
source address that is used for read moves within DMA transfers.
A write to SADRmn is executed directly only when the DMA channel mn is inactive
(CHSRmn.TCOUNT = 0 and TRSR.CHmn = 0). If DMA channel mn is active when
writing to SADRmn, the source address will not be written into SADRmn directly but will
be buffered in the shadow register SHADRmn until the start of the next DMA transaction.
During this shadowed address register operation, bit field ADRCRmn.SHCT must be set
to 01
B
.
DMA_SADR0x (x = 0-7)
DMA Channel 0x Source Address Register
(090
H
+x*20
H
)
Reset Value: 0000 0000
H
DMA_SADR1x (x = 0-7)
DMA Channel 1x Source Address Register
(190
H
+x*20
H
)
Reset Value: 0000 0000
H
31
0
SADR
rwh
Field
Bits
Type Description
SADR
[31:0]
rwh
Source Start Address
This bit field holds the actual 32-bit source address of
DMA channel mx that is used for read moves.
Содержание TC1784
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