ARM DSTREAM-ST Getting Started Manual page 18

DSTREAM-ST Getting Started Guide
TRACING
Indicates that DSTREAM-ST is attempting to capture data and synchronize with the trace
stream.
TRIGGER
Indicates that a trigger is present in the trace data.
DATA
Indicates that trace synchronization is complete and DSTREAM-ST is capturing trace data.
Trace synchronization is when the DSTREAM-ST unit aligns with the trace data stream on
detection of a full synchronization packet.
OVERFLOW
Indicates an overflow-condition during trace capture. An overflow condition occurs if it has
not been possible to stream trace data to the host PC at a high enough rate. For example,
if the USB port is only operating in USB 2.0 mode, if the Ethernet port is only operating
at 100Mbps, or if other applications on the host PC are using too much USB or Ethernet
bandwidth.
In general, when streaming trace data, the best practice is to keep usage of other
applications, on the host PC, to a minimum.
TRC CLK
If the TRC CLK LED is green, it indicates that a valid trace clock is detected. This is the
normal condition when capturing trace data from a target.
If the TRC CLK LED is off, then no trace clock signal is detected.
If the TRC CLK LED is red and flashing, it indicates that the received trace clock frequency is
too high or too low to be captured.
Related information
Connect and power up the DSTREAM-ST unit
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The DSTREAM-ST system
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