dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 40

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

Core Architecture Overview
2.2
The registers in the DSP56800E core that are considered part of the core programming model are shown in
Figure 2-1. Registers for on-chip peripherals are mapped into a 64-location block of data memory. An
example for this block of memory is shown in Table 2-1 on page 2-3. Consult a specific device’s user’s
manual for details on the peripherals that are implemented, their function, the registers that are defined for
them in this memory area, and their location in memory.
2-2
Core Programming Model
23
23
23
20
20
Fast Interrupt Return Address
C
D
A
B
Figure 2-1. DSP56800E Core Programming Model
Pointer Registers
Y
Hardware Stack
35
Loop Address
Program Counter
A2
B2
C2
D2
HWS0
HWS1
32
FIRA
R0
R1
LA2
N
SP
R2
R3
R4
R5
LA
DSP56800E Core Reference Manual
31
15
PC
Data Arithmetic Logic Unit (ALU)
Address Generation Unit (AGU)
C1
D1
A1
B1
Y1
Y0
X0
Program Control Unit
Data Registers
0
0
0
0
0
16
0
15
C0
D0
A0
B0
15
15
15
15
Secondary Offset Register
Operating Mode Register
and Status Register
Modifier Registers
12
Fast Interrupt Status
Loop Counter
(OMR, SR)
OMR
M01
0
LC2
Register
N3
SR
LC
FISR
Freescale Semiconductor
0
0
0
0
0