5 Configuring the Power Profiler Kit
Doc. ID 4425_027 v1.0
Page 16
• The USB cable is inserted into the USB on the nRF5x DK and connected to a computer with the PPK desktop
application.
5.4 Current measurements on the nRF5x DK while debugging
The purpose of this setup is to be used at a design and optimization stage where no custom hardware is
available yet. The SEGGER J-Link debugger on the nRF5x DK is used for debugging.
As the SEGGER J-Link of the nRF5x DK is used for debugging, an additional SEGGER J-Link is needed for
connection to the computer and the PPK desktop application. This could be either another nRF5x DK SEGGER
J-Link or a standalone SEGGER J-Link which can be purchased separately from
.
The configuration for this use case is shown in the following figure.
Figure 10: Current measurements on the nRF5x DK with debugging
Make sure that the following are configured:
• The PPK board (PCA63511) is connected to the nRF5x DK board as described in
on page 15.
• The DUT select (
SW2
) switch is in the "DK" position.
• The Power select (
SW4
) switch is in the "DK" position.
• The USB cable is inserted into the USB on the nRF5x DK and connected to a computer running the
debugging software.
• The additional SEGGER J-Link is connected to the Debug in (
P21
) connector on the PPK, using the 10-pin
flat cable. The USB cable is inserted into the SEGGER J-Link and connected to a computer running the PPK
desktop application.
• The COM (
SW3
) switch is in the "EXT" position.
Important:
Power consumption may be higher for devices during debugging than in normal
operation. The difference depends on what is active at any given time. This is caused by the clocking
of the debug interface and constantly powering sections of the device that are independent of the
operation of the part. When debugging, accurate power consumption cannot be measured, but
software issues can be detected.
5.5 Current measurements on a custom hardware with nRF5x DK
The purpose of this setup is to be used at a design stage on a custom hardware with the nRF5x DK.
In this use case, the PPK measures the current on the custom hardware (DUT). The PPK is connected to the
nRF5x DK which is used as a SEGGER J-Link interface to the computer running the PPK desktop application.
