3 The Power Profiler Kit overview
Doc. ID 4425_027 v1.0
Page 12
Switch
Description
•
DK
: The measurements are performed on the nRF5x DK.
•
External
: The measurements are performed on the external/custom hardware
connected to the External DUT (
P16
) connector.
Power select (
SW4
)
Used to select the power source for the PPK and DUT.
Options:
•
DK
: Select this option if the power source is the nRF5x DK. Used when
performing measurements on the nRF5x DK (that is, when the DUT select switch
is in the "DK" position).
•
Reg.
: Select this option if the power source is the on-board regulator powering
the PPK and the external DUT. Used when performing measurements on the
external/custom hardware (that is, when the DUT select (
SW2
) switch is in the
"External" position).
•
External
: Select this option if an external power supply is the power source
connected to the External DUT supply (
P22
) connector of the PPK.
Important:
The PPK desktop application can be used to adjust the power supply voltage
only when the Power select (
SW4
) switch is in the "Reg" position, that is,
when the power is supplied by the PPK on-board regulator.
Important:
If you need to use the PPK on-board regulator (the Power select (
SW4
)
switch in the "Reg" position) when performing measurements on the nRF5x
DK, note that it is not recommended unless the PPK on-board regulator
voltage exactly matches the nRF5x DK voltage. Even a small mismatch
between the two will influence the current measurements due to current
leakage and result in erroneous measurement or hardware damage.
The voltage is usually somewhere between 2.9 and 3 V. To be sure, it is
recommended to measure the DK voltage. This configuration, although
possible, is not recommended.
COM (
SW3
)
This switch is used to select the SEGGER J-Link connection.
Options:
•
DK
: The SEGGER J-Link on the nRF5x DK kit is used.
•
EXT
: An external SEGGER J-Link is used and connected to the Debug in (
P21
)
connector. This will disconnect the PPK from the SEGGER J-Link on the nRF5x DK.
Important:
To program the DUT on the DK, the switch must be in the "EXT" position.
When programming with the switch in the "DK" position, the PPK will be
programmed.
Important:
When the PPK uses the nRF5x DK SEGGER J-Link, it cannot be used to debug
the nRF5x SoC on the DK at the same time. To debug the nRF5x DK SoC on
the DK, set the COM (
SW3
) switch in the “EXT” position.
