Current wave in system OFF

RE: Current wave in system OFF

Pepam — Tue, 06 Sep 2022 08:03:19 GMT

Hi, yes, all active components are turned off before going to system OFF.

RE: Current wave in system OFF

Stian Røed Hafskjold — Mon, 05 Sep 2022 10:31:10 GMT

Hi, this waveform looks like a floating GPIO (input GPIO with input buffer connected, e.g. MISO, interrupt pin from accelerometer, UART RX, etc.) on the nRF52832. Did you configure any of the pins as an input, while the input level is not defined by the external component, i.e. driven high or low? Maybe there should be a pullup/down resistor on one of these GPIO inputs, to define the level when it's not driven by the slave?

It could also be a symptom of not connecting the GND between the PPK and the DUT when in ampere meter mode. In ampere meter mode you need to connect 3 wires. VIN, VOUT and GND.

Best regards,
Stian

RE: Current wave in system OFF

usmanmehmood55 — Mon, 05 Sep 2022 08:14:18 GMT

Pepam are you turning off the active components before going into System OFF mode? This waveform could be there due to any number of reasons including charging and discharging of capacitors. Perhaps you could provide more information about the circuit itself?