Power Profiler problem

[Mouser.Paul]

1. Wiring diagram

2. Testing process，The product will automatically disconnect. But it can connect again.
   
3. After setting the voltage to 1.8V in the voltage Reguator, the JLINK will not connect if it is disconnected.
4. The power on device can not be connected to JLINK again. LED2 power on is high brightness and then reduces brightness.
5. I would like to know if there any problem for the kit?

[Stian Røed Hafskjold]

So you mean that the JLINK connection to the PPK is lost when you set the voltage to 1.8 V? Or is it the connection to the DUT that is lost?

Which JLINK version are you using? JLink Lite does not support voltages below 2.3V

Earlier versions of the PPK did have some issues at lower voltages. Can you please tell me your PPK version? Both hardware and software. Thanks

[Mouser.Paul]

1.The PPK connection to JLINK is lost

2.I use JLINK V9.

3.Now the PPK version is JOVE jve-m2 

[Stian Røed Hafskjold]

In your picture I only see 3 wires. You need 4:

• GND
• VDD
• SWDIO
• SWDCLK

Which JLINK product are you using? It might not support 1.8V. I would suggest to use a nRF52 DK as the debugger. Connect a cable from the debug out port of of the DK and to the debug in port on the PPK.

[Mouser.Paul]

How to restore the voltage to the initial 3V?

[Stian Røed Hafskjold]

You can set the Power select switch to External and supply the external supply pins with 3V.

Or you can set the switch to the DK position and put the PPK on top of a DK. With the USB connected to the DK