TMS320VC5416
Fixed-Point Digital Signal Processor
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SPRS095O–MARCH 1999–REVISED JANUARY 2005
These new bit fields were created to allow the user to define the space-select for the DMA
(internal/external). The functions of the DLAXS and SLAXS bits are as follows:
•
DLAXS(DMMCRn[5]) Destination
–
–
0 = No external access (default internal)
1 = External access
•
SLAXS(DMMCRn[11]) Source
–
–
0 = No external access (default internal)
1 = External access
Table 3-9 lists the DMD bit values and their corresponding destination space.
Table 3-9. DMD Section of the DMMCRn Register
DMD
00
Destination Space
PS
DS
01
10
I/O
11
Reserved
For the CPU external access, software can configure the memory cells to reside inside or outside the
program address map. When the cells are mapped into program space, the device automatically accesses
them when their addresses are within bounds. When the address generation logic generates an address
outside its bounds, the device automatically generates an external access.
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Functional Overview
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