Specifications

Altera Corporation 5–21
October 2007 Nios II Processor Reference Handbook
Nios II Core Implementation Details
Exception Handling
The Nios II/e core supports the following exception types:
■ Hardware interrupt
■ Software traps
■ Unimplemented instruction
JTAG Debug Module
The Nios II/e core supports the JTAG debug module to provide a JTAG
interface to software debugging tools. The JTAG debug module on the
Nios II/e core does not support hardware breakpoints or trace.
Unsupported Features
The Nios II/e core does not handle the execution of instructions with
undefined opcodes. If the processor issues an instruction word with an
undefined opcode, the resulting behavior is undefined.
Referenced
Documents
This chapter references the following documents:
■ Instruction Set Reference chapter of the Nios II Processor Reference
Handbook
■ Processor Architecture chapter of the Nios II Processor Reference
Handbook
■ Programming Model chapter of the Nios II Processor Reference Handbook