Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 243

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INTERNAL MEMORY
-2
-5
-7
....
DELAY-LINE
TAP LIS
T
SAMPLE (N-M)
0x343434
0XEEEEEE
0XCCCCCC
....
DMA DESTINATION
(SAMPLES FETCHED
FROM D-LINE)
Figure 3-28. Delay Line DMA Reads
these delay line reads. Once the read count completes, the
register decrements to zero (both
final tap. Finally, the delay line DMA access completes and the
DMA completion interrupt is generated. If chaining is enabled, the
interrupt is dependent on the
can only be initialized using the TCB. In order to use the delay line
DMA for a single DMA sequence, initialize the
zero in the TCB.
For each 32-bit tap read, the external read index is shown in
Note that one tap list entry starts multiple reads.
ADSP-214xx SHARC Processor Hardware Reference
www.BDTIC.com/ADI
IIEP
x
0
C000
IMEP
x
0
C001
ICEP
x
0
C002
EIEP
....
EMEP
EBEP
ELEP
x
0
C000
RIEP
x
0
C001
RCEP
x
0
C002
RMEP
....
TCEP
TPEP
CPEP
EXTERNAL MEMORY
0xC2000
1
100
0x0009
1
0x00000
256
0xC1000
1
1
3
0xC0000
---
and
are zero) for the
ICEP
TCEP
bit setting. The delay line DMA
PCI
CPEP
External Port
(DELAY LINE)
0xAAAAAA
0
0xBBBBBB
0
0xCCCCCC
0
0xDDDDDD
0
0xEEEEEE
0
0xFFFFFF
0
0x121212
0
0x343434
0
0x565656
0
0x787878
0
. . .
.
?
0
ICEP
register to
Table
3-27.
3-113

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