TMS320VC5470 Datasheet, PDF (24/93 Pages) Texas Instruments – Fixed-Point Digital Signal Processor

DSP Subsystem Functional Overview
3.2.4 API Boot-Mode DSP Memory Map
The memory map when the API boot mode feature is enabled is shown in Figure 3–3. API boot mode is
enabled when DSP_REG[9] (DSP_APIBN) is 0 and BSCR[4] (ABMDIS) is 0.
Hex
0000
007F
0080
1FFF
2000
37FF
3800
3FFF
4000
5FFF
6000
Page 0 Program,
MP/MC = 1
(Microprocessor Mode)
OVLY = 1
OVLY = 0
Reserved
External
Program
Space
On-chip Data
DARAM
On-chip Data
DARAM,
API-accessible
External
Program
Space
On-chip Data
SARAM
External Program Space
F7FF
F800
FFFF
Shadowed API DARAM (2K)
Hex
0000
007F
0080
1FFF
2000
37FF
3800
3FFF
4000
5FFF
6000
Page 0 Program,
MP/MC = 0
(Microcomputer Mode)
OVLY = 1
OVLY = 0
Reserved
External
Program
Space
On-chip Data
DARAM
On-chip Data
DARAM,
API-accessible
External
Program
Space
On-chip Data
SARAM
External Program Space
F7FF
F800
FFFF
Shadowed API DARAM (2K)
Hex
0000
007F
0080
1FFF
2000
37FF
3800
3FFF
4000
5FFF
6000
7FFF
8000
BFFF
C000
DFFF
E000
F7FF
F800
FFFF
Data
Memory Mapped Registers,
Scratch-Pad RAM
On-chip Data DARAM
(8K–0x80 Words)
On-chip Data DARAM,
API-Accessible
(8K Words)
(shadowed portion)
On-chip Data SARAM
(8K Words – data only)
On-chip Data SARAM
(8K Words)
External Data Space Memory
DROM=1
On-chip
Program
SARAM
(8K Words)
On-chip
Program
SARAM
(6K Words)
DROM=0
External Data
Space
Memory
External Data Space Memory
† _{When DSP_REG[9] (DSP_APIBN) = 0 and BSCR[4] (ABMDIS) = 0, 2K words of the API DARAM are remapped to program-space, regardless of}
DSP_REG[10] (MP/MC) value. All other internal program-space RAMs are disabled in program space. Overlayable data-space RAMs may be
dual-mappedto program-space via OVLY.
Figure 3–3. API Boot Mode Memory Map for DSP Accesses (DSP_APIBN = 0 and ABMDIS = 0)^†
14 SPRS017B
December 2001 – Revised December 2002