IAR SYSTEMS I-jet - Using Trace; Updating the Probe Firmware

AFE1_AFE2-1:1
I-jet Trace
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I-jet Trace CM can supply a maximum of 4.66 V at 200 mA when using USB3 ports
without the need of plugging in an external 5 V DC power supply.
I-jet Trace A/R/M must use the supplied (5 V DC at 2 A) power adapter to power a target
board. When it is not powering the target, I-jet Trace A/R/M does not need the external
power supply as long as it is connected to the USB3 port.
Power up your evaluation board
If you have an evaluation board that is prepared for it, you can power the board via
I-jet Trace through pin 19 on the standard Arm-20 connector, or pin 11/13 on the small
MIPI-20 connector. Target power of up to 400 mA can be supplied from I-jet Trace with
overload protection. Most of the IAR Systems KickStart Kits contain an evaluation
board that can be powered this way. Make sure that the power jumper found on most of
these boards matches your setup.
Note: The target board will only get power via I-Jet Trace once you choose the
Download and Debug or Debug without Downloading command in C-SPY, and not
before.
Note: The only way to use the power debugging feature is to power up your evaluation
board via I-jet Trace or to use I-scope.
USING TRACE
To use ETM trace, the target board must have a Cortex device with the ETM/PTM trace
pins—usually named TraceCLK and TraceDxx—and these pins must be connected to
the debug connector. Because trace pins are multiplexed on some devices, take care not
to connect these pins to other logic devices on the PCB to minimize the loading and
improve signal integrity.
C-SPY will initialize and enable all necessary registers on the MCU to allow the ETM
port to function properly so that no special user code instrumentation is necessary.
However, ensure that the running application code does not interfere (read, write, etc.)
with the GPIO pins used for the ETM trace.
The TRC LED on the I-jet Trace debug probe will turn green when trace data is being
collected. This usually happens after trace is enabled in C-SPY and the Run command
is issued.
For more information about trace, see the C-SPY Debugging Guide for Arm.
UPDATING THE PROBE FIRMWARE
For more information, see Updating the probe firmware, page 9.