SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 367
SAM3X8E
Manufacturer Part Number
SAM3X8E
Description
Manufacturer
Atmel Corporation
- Current page: 367 of 1465
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11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
• When the destination peripheral has been defined as the flow controller, if the destination
• When a Memory to Peripheral transfer occurs, if the destination peripheral has been defined
• You must program the DMAC_SADDRx and DMAC_DADDRx channel registers with a byte,
• After the software disables a channel by writing into the channel disable register, it must re-
• If you program the BTSIZE field in the DMAC_CTRLA as zero, and the DMAC has been
• When hardware handshaking interface protocol is fully implemented, a peripheral is expected
• Multiple Transfers involving the same peripheral must not be programmed and enabled on
• When a Peripheral has been defined as the flow controller, the targeted DMAC Channel must
width is smaller than the source width, then a data loss may occur, and the loss is equal to
the Source Single Transfer size in bytes- destination Single Transfer size in bytes.
as the flow controller, then a prefetch operation is performed. It means that data is extracted
from the memory before any request from the peripheral is generated.
half-word and word aligned address depending on the source width and destination width.
enable the channel only after it has polled a 0 in the corresponding channel enable status
register. This is because the current AHB Burst must terminate properly.
defined as the flow controller, then the channel is automatically disabled.
to deassert any sreq or breq signals on receiving the ack signal irrespective of the request
the ack was asserted in response to.
different channels, unless this peripheral integrates several hardware handshaking
interfaces.
be enabled before the Peripheral. If you do not ensure this and the First DMAC request is
also the last transfer, the DMAC Channel might miss a Last Transfer Flag.
SAM3X/A
SAM3X/A
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