peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 240

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

4.2.3
Two independent memory spaces are available: the data space (XRAM and YRAM) and
the program space. Each of them is 64 K words.
4.2.3.1
Addresses 0x0000− 0x0016 (see Figure 4-1) are used as interrupt vectors for Reset,
TRAP/BI (software interrupt/breakpoint interrupt), NMI (Non-maskable interrupt) and
three maskable interrupts (INT0, INT1, INT2). The RESET, TRAP/BI and NMI vectors
have been separated by two locations so that branch instructions can be accommodated
in those locations if desired. The maskable interrupts have been separated by eight
locations so that branch instructions, or small and fast interrupt service routines, can be
accommodated in those locations.
The program memory can be implemented on-chip, and/or off-chip. The OAK supports
a wait-state generator for interfacing slow program memory.
The program memory addresses are generated by the PCU.
Figure 4-1
Semiconductor Group
Memory Spaces and Organization
Program Memory
Program Memory Map
~ ~
INTerrupt 2
INTerrupt 0
INTerrupt 1
TRAP/B1
Reset
NMI
4-5
~ ~
FFFF
ITD10231
000E
0010
0006
0004
0002
0000
H
H
H
H
H
H
H
DSP Core OAK
PEB 20560
2003-08