CPU Current In-rush

[Dave_couling]

I've recently been noticing on the Rev 3 silicon that there is a 19mA current rush at the Start of a connection event at the rising edge of Pre-processing.

What could this current rush mean?
LFCLK issue?
Silicon issue?

Thanks guys

[Einar Thorsrud]

This is expected in some cases. If you sum radio peak current with no DCDC (13 mA), CPU current (4.1 mA) and current consumption of other resources used simultaneously (HF clock and maybe some other peripherals) you can see a current consumption peak in that range.

[Dave_couling]

Hi Einar,

Yes I've considered that scenario. However I'm using SDK 6.1, S110 7.1. So there is no concurrency with CPU and radio. Furthermore the pre-processing region of a connection event should have no Radio consumption as the HFCLK has not started yet.