XC2000 datasheet(49/110 Pages) INFINEON

49 / 110 page

XC2287 / XC2286 / XC2285

XC2000 Family Derivatives

Functional Description

Preliminary

Data Sheet

V0.91, 2007-02

Draft Version

3.5

On-Chip Debug Support (OCDS)

The On-Chip Debug Support system provides a broad range of debug and emulation

features built into the XC228x. The user software running on the XC228x can thus be

debugged within the target system environment.

The OCDS is controlled by an external debugging device via the debug interface,

consisting of the IEEE-1149-conforming JTAG port and a break interface. The debugger

controls the OCDS via a set of dedicated registers accessible via the JTAG interface.

Additionally, the OCDS system can be controlled by the CPU, e.g. by a monitor program.

An injection interface allows the execution of OCDS-generated instructions by the CPU.

Multiple breakpoints can be triggered by on-chip hardware, by software, or by an

external trigger input. Single stepping is supported as well as the injection of arbitrary

instructions and read/write access to the complete internal address space. A breakpoint

trigger can be answered with a CPU-halt, a monitor call, a data transfer, or/and the

activation of an external signal.

Tracing data can be obtained via the JTAG interface or via the external bus interface for

increased performance.

The debug interface uses a set of 6 interface signals (4 JTAG lines, 2 optional break

lines) to communicate with external circuitry.

XC2000 Datasheet(PDF) 49 Page - Infineon Technologies AG