The unit has ports at the rear for connecting to the host
computer and to a power source. These ports are shown in the following
Figure 1-1 Rear of DSTREAM unit
The LEDs at the bottom of the Ethernet port display information
about Ethernet speed and activity:
- The green LED shows the Ethernet
speed. When Off, it indicates a speed of 10Mbps, and when On indicates
a speed of 100Mbps.
- The yellow LED indicates that activity is taking
The RESET button resets the DSTREAM unit when required:
- Press and hold the RESET button until the STATUS
LED starts to flash green rapidly. If you release the RESET button
at this point, a normal reboot occurs.
- If you continue to hold the RESET button for 10
seconds more, the STATUS LED flashes red rapidly. When you release
the RESET button after this point, DSTREAM reboots and enters a
recovery mode, which enables you to update firmware.
The ports at the front of the unit are shown in the following
Figure 1-2 Front of DSTREAM unit
The AUX port is included for future enhancement of the product.
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.
Figure 1-3 Indicator LEDs
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
The DSTREAM logo flashes for five seconds when you use the Identify tool.
The LEDs representing the DSTREAM debug feature have the following
- 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.
- The FLASH LED illuminates green to denote that the
unit is accessing its internal flash storage.
- The TARGET LED illuminates when a target VTref is
detected using the probe.
- The DEBUG LED illuminates green when debug data
transfer is taking place.
The LEDs representing the DSTREAM trace feature have the following
- The TRACING LED indicates that tracing is in progress.
- The TRIGGER LED indicates that a trigger is detected.
- The DATA LED indicates that there is valid data
in the data buffer.
- 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.
If the probe TRC CLK LED is green and the DSTREAM unit TRC CLK LED is red then the
target is outputting a trace clock but the DSTREAM unit is unable to lock on to it.
Possible causes for this are that the clock frequency is too high or that the clock
frequency is varying too much.
NoteThe 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.