The DSTREAM unit

The DSTREAM unit provides the hardware interface to enable a software debugger to control and trace multiple devices. 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.

Figure 1. Rear of DSTREAM unit

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The LEDs at the bottom of the Ethernet port display information about Ethernet speed and activity:

The RESET button is used to reset the DSTREAM unit when required:

The ports at the front of the unit are shown in the following figure.

Figure 2. Front of DSTREAM unit

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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 3. Indicator LEDs

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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.

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