Standard Dma; Circular Buffered Dma - Analog Devices SHARC ADSP-214 Series Hardware Reference Manual

Standard DMA

This DMA type resembles the traditional DMA type to initialize the dif-
ferent internal and external parameters (index, modify and count) registers
and configuration of the DMA control registers.
Note that the
ECEP
ister. If is written, the
ICEP
(Figure 3-21).
SOURCE BUFFER
20
19
18
17
3
2
1
Figure 3-21. Standard Write

Circular Buffered DMA

Circular buffered DMA
tional core DAG circular buffered mode by using registers for circular
buffering. In this mode the DMA needs two additional registers (base and
length) to support reads and writes to a circular buffer.
ADSP-214xx SHARC Processor Hardware Reference
www.BDTIC.com/ADI
parameter register (read only) is a copy of the
register is updated automatically
ECEP
DESTINATION INDEX
SOURCE INDEX
(Figure 3-22,
DESTINATION BUFFER
1
2
3
4
18
19
20
Figure 3-23) resembles the tradi-
External Port
reg-
ICEP
3-103