Texas Instruments MSP430x1xx manual DMAxCTL, DMA Channel x Control Register

DMAxCTL, DMA Channel x Control Register

15 14 13 12

11 10 9 8

Reserved

DMADTx

DMADSTINCRx

DMASRCINCRx

rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)

7 6 5 4

3 2 1 0

DMA

DSTBYTE

DMA

SRCBYTE

DMALEVEL

DMAEN

DMAIFG

DMAIE

DMA

ABORT

DMAREQ

rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0) rw−(0)

Reserved

DMADTx

DMA DSTINCRx

DMA SRCINCRx

DMA DSTBYTE

Bit 15	Reserved
Bits	DMA Transfer mode.
14−12	000	Single transfer
	001	Block transfer
	010	Burst-block transfer
	011	Burst-block transfer
	100	Repeated single transfer
	101	Repeated block transfer
	110	Repeated burst-block transfer
	111	Repeated burst-block transfer
Bits	DMA	destination increment. This bit selects automatic incrementing or
11−10	decrementing of the destination address after each byte or word transfer.
	When DMADSTBYTE=1, the destination address increments/decrements by
	one.	When	DMADSTBYTE=0,	the	destination	address
	increments/decrements by two. The DMAxDA is copied into a temporary
	register and the temporary register is incremented or decremented. DMAxDA
	is not incremented or decremented.
	00	Destination address is unchanged
	01	Destination address is unchanged
	10	Destination address is decremented
	11	Destination address is incremented
Bits	DMA	source increment. This bit selects			automatic incrementing or
9−8	decrementing of the source address for each byte or word transfer. When
	DMASRCBYTE=1, the source address increments/decrements by one.
	When DMASRCBYTE=0, the source address increments/decrements by
	two. The DMAxSA is copied into a temporary register and the temporary
	register is incremented or decremented. DMAxSA is not incremented or
	decremented.
	00	Source address is unchanged
	01	Source address is unchanged
	10	Source address is decremented
	11	Source address is incremented

Bit 7 DMA destination byte. This bit selects the destination as a byte or word.

0Word

1Byte

8-21