peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 239

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

• The product register is transferred to the accumulator without scaling, or after scaling
• Add/Subtract/Compare of a long immediate value with registers or data memory, with
• Powerful swapping (14 options) between two sets of accumulators.
• Automatic saturation mode on overflow while reading content of accumulators, or
• Zero-overhead looping by two interruptable mechanisms: Single word Repeat and
• Memory mapped I/O.
• Wait state support.
• Support for Program memory protection.
• Upward compatibility with the SPC instruction-set.
• On-chip emulation support.
• Automatic boot procedure support.
4.2.2
4.2.2.1
Data is transferred on the following 16-bit buses:
two bidirectional buses − the X Data Bus (XDB); the internal core general data bus (GDB)
and one unidirectional bus − the Y Data Bus (YDB).
The XDB is the main data bus, where most of the data transfers occur. It is a buffered
extension of the internal general data bus (GDB). Data transfer between the Y Data
Memory (YRAM) and the Multiplier (Y register) occurs over the YDB, when a multiply
instruction uses two data memory location simultaneously.
The bus structure supports register to register, register to memory, memory to register,
program to data, program to register and data to program data movements. It can
transfer up to two 16-bit words within one instruction cycle.
Addresses are specified for the local X_RAM and Y_RAM on two unidirectional buses:
the 16-bit X Address Bus (XAB), and the 11-bit Y Address Bus (YAB).
4.2.2.2
Program memory addresses are specified on the 16-bit unidirectional Program Address
Bus (PAB) while the Instruction word fetches take place in parallel over Program Data
bus (PDB).
Semiconductor Group
by shifting the product 1 bit to the left, 2 bits to the left or 1 bit to the right.
no affect on the accumulator content.
using a special instruction.
Block Repeat with four levels of nesting.
Buses
Data Buses
Program Buses
4-4
DSP Core OAK
PEB 20560
2003-08