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ARM DUI 0481D
ID071311
Ethernet, USB and probe cables are supplied to connect the DSTREAM unit to the host
computer, and to the target hardware.
The following figure shows the location and name of each of the indicator LEDs.
USER IO
When you power-up the DSTREAM unit, the DSTREAM logo on the top of the unit illuminates
and the STATUS LED begins to flash. The STATUS LED remains illuminated to show that
DSTREAM is in its ready state.
The DSTREAM logo flashes for five seconds when you use the Identify tool.
The LEDs representing the DSTREAM debug feature have the following functions:
STATUS
The STATUS LED illuminates as continuous red if a critical error is detected. You
must reboot DSTREAM before you can continue using it. To do this, press and
hold the RESET button for approximately three seconds, then the STATUS LED
turns off.
FLASH
The FLASH LED illuminates green to denote that the unit is accessing its internal
flash storage.
TARGET
The TARGET LED illuminates when a target VTref is detected using the probe.
DEBUG
The DEBUG LED illuminates green when debug data transfer is taking place.
The LEDs representing the DSTREAM trace feature have the following functions:
TRACING The TRACING LED indicates that tracing is in progress.
TRIGGER The TRIGGER LED indicates that a trigger is detected.
DATA
The DATA LED indicates that there is valid data in the data buffer.
FULL
The FULL LED illuminates when a sufficient amount of trace data has been
captured to fill the defined buffer size. The buffer then wraps, and continues to
capture trace data, overwriting the original trace data captured.
TRC CLK
If green, the TRC CLK LED indicates that a valid trace clock is detected. If red,
the TRC CLK LED indicates that there is a problem with the trace clock.
The DSTREAM unit contains an internal cooling fan that operates to control the internal
temperature when necessary. Do not obscure the ventilation panels on the front and back of the
DSTREAM unit.
Copyright © 2010-2011 ARM. All rights reserved.
Non-Confidential
Introduction to ARM DSTREAM
PROBE
AUX
Figure 2-3 Indicator LEDs
2-6
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