dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 262

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

Program Controller
When reset occurs, the XP bit in the OMR register is cleared. This event places the device back into
normal program-memory execution mode. It is not possible to have the DSP56800E exit reset and then go
straight into data-memory execution mode.
8-24
$1FFFFF
The XP bit in OMR enables this operating mode.
$0
accessible in
accessible in
Program
Memory
this mode.
this mode.
Figure 8-5. Example Data-Memory Execution Mode Memory Map
External
program
program
memory
memory
Internal
is
is
not
not
$FFFFFF
$0
DSP56800E Core Reference Manual
Memory
Interrupt
Vectors
Space
Data
$FFFFFF
$1FFFFF
$00FFFF
$00FF80
$0
0
Data Memory
16M × 16
Peripherals
(EX = 0)
On-Chip
External
On-Chip
Memory
Memory
Data
Data
Locations above $1FFFFF are
not accessible in data-memory
execution mode.
On- and off-chip data memory can
hold both data and program
instructions to be executed. The
interrupt vector table can also be
located in these memory spaces.
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