C.1.1. LEDs

The LEDs on the RealView Trace front panel have the following functions:

PWR

The PWR LED indicates that the RealView Trace unit is powered up. This is always lit when the unit is powered from its own external power supply. When RealView Trace is powered by RealView ICE, the Power LED is lit only when RealView ICE is initializing the RealView Trace unit.

BUS

The BUS LED indicates module initialization and RealView ICE expansion bus power. It lights up when RealView ICE is initializing the RealView Trace unit, and remains lit while the RealView ICE expansion bus is powered. The BUS LED flashes on a module connected to RVI through the expansion bus if an error is detected in trying either to identify the module or to provide power to it. Modules might require more power than the RVI can provide, in which case the module must be separately powered. If the module is separately powered and this LED flashes, it indicates a problem in identifying the module.

DATA

The DATA LED indicates that the RealView Trace module has data in its buffer

FULL

The FULL LED indicates that the RealView Trace module data buffer is full.

TRC

The TRC LED indicates that the RealView Trace module has enabled the buffer for capture.

TRIG

The TRIG LED indicates that the RealView Trace module has triggered.

OVR

The OVR LED (not available pre-version 2) indicates that the streaming trace has overrun the available USB bandwidth. When this occurs, this LED flashes.

TGT

The TGT LED (not available pre-version 2) indicates if there is a problem with the target. If the target present line is low, or if there is no clock, this LED flashes.

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