Analog Devices SHARC ADSP-21368

Setting Up DMA Parameter Registers
2-30 ADSP-21368 SHARC Processor Hardware Reference
All addresses in the index registers are offset by a value that matches the
processor’s first internal normal word addressed RAM location (before the
I/O processor uses the addresses). For the ADSP-21367/8/9 and
ADSP-2137x processors, this offset value is 0x0008 0000.
Figure 2-3. DMA Address Generator
LOCAL BUS
IMX
MODIFIER
INTERNAL
MEMORY
ADDRESS
DMA ADDRESS GENERATOR (INTERNAL ADDRESSES)
LOCAL BUS
CX
COUNT
CPX
CHAIN POINTER
MUX
DMAWORDCOUNTER
–1
WORKING REGISTER
IIX
INDEX (ADDRESS)
+/-
POST-MODIFY
+
LOCAL BUS
EMPP
EXT. MODIFIER
ECPP
EXT. COUNT
–1
EXTERNAL
MEMORY
ADDRESS
POST-MODIFY
EIPP
EXT. INDEX (ADDRESS)
DMA ADDRESS GENERATOR (EXTERNAL ADDRESSES)
+
+