The Parallel Trace probe
The Parallel Trace probe provides the hardware interface to connect the DSTREAM-ST unit to the parallel trace port of your target.
- Power input
Connect the power supply unit to Power input port using the dual power cable.
The top of the Parallel Trace probe has ports for connecting to a DSTREAM-ST unit and to a target.
- Host port
Connects to the DSTREAM-ST unit using a 60-way ribbon cable. The host port also controls the Parallel Trace probe and retrieves trace data from it.
- Debug via MIPI-60 port
Passes debug signals from DSTREAM-ST unit to the trace connector. When used, it connects to the DSTREAM-ST unit using the Arm JTAG 20 cable.
If the target uses separate debug and trace connectors, the debug connection must be made directly between the DSTREAM-ST unit and the target, leaving this connector, on the Parallel Trace probe, unused.
- MIPI-60 port
Connects to the target trace connector via a MIPI-60 co-axial ribbon cable.
The MIPI-60 cable is a Samtec HQCD-030-12.00-TEU-SEU-1. For physical and electrical data, see the Samtec website.
Included with DSTREAM-PT are:
CoreSight adapter - This plugs directly into the MIPI-60 port of the Parallel Trace probe and is used together with the CoreSight™ 20-way cable.
MICTOR 16-Bit adapter - This plugs directly into the target board and is used together with the MIPI-60 cable.
MICTOR 32-Bit adapter - This plugs directly into the target board and is used together with the MIPI-60 cable. Refer to the Arm DSTREAM-PT System and Interface Design Reference Guide for further information about requirements for using dual MICTOR sockets.
When you power up the Parallel Trace probe, various LEDs on top of the unit indicate the status of the unit.
At power-up the Status LED:
Briefly illuminates red, to indicate that the probe is powered and initializing.
Illuminates green, to indicate that the probe is in its ready state.
If the Status LED remains red, the Parallel Trace probe has failed to boot. Ensure your DSTREAM-ST firmware is version 5.0.0, or later. For more information on updating the DSTREAM-ST firmware, see Update the DSTREAM-PT system firmware. If the firmware is the correct version, restore the DSTREAM-ST unit. To restore the DSTREAM-ST unit, follow the instructions in Restore a DSTREAM-PT system.
- Host Link
At power-up, the Host Link LED:
Briefly flashes blue, to indicate that the link to the DSTREAM-ST unit is initializing.
Illuminates green, to indicate that the link is ready.
If the Host Link LED does not flash blue, or continues to only flash blue, see Host Link issues
Illuminates green when a valid VTREF or TRACE_VTREF signal is detected.
If debug and trace use the same power domain, it is referred to as VTREF.
If debug and trace use separate trace and debug power domains, TRACE_VTREF and DEBUG_VTREF are referred to separately.
The TARGET LED on the DSTREAM-ST unit indicates the state of DEBUG_VTREF for targets which use separate debug and trace power domains.
For more information about Target Voltage Reference (VTREF) signals, see Target Voltage Reference (VTREF) signals in the Arm® DSTREAM-PT System and Interface Design Reference Guide.
Illuminates green to indicates that the trace buffer is full.