about current consumption at 1.8V

RE: about current consumption at 1.8V

Sigurd — Mon, 07 Aug 2017 07:58:10 GMT

Try __WFE(); __SEV(); __WFE(); , and then do a power-reset.

If that does not help, then it could be an issue with debug mode. See this post. Regarding your layout:

We recommend to add a small resistor on the SWDCLK line to make it more robust [See reference circuitry in nRF51822 Product specification v3.3. The resistor should be as small as possible, yet still make it possible to program the chip. We have recommended 1kohm.

RE: about current consumption at 1.8V

Sigurd — Fri, 04 Aug 2017 08:33:42 GMT

Hi,

Please make sure you do a power-reset before starting any measurement. After programming the chip the nRF51 will stay in debug mode which consumes ~1mA

RE: about current consumption at 1.8V

Roger Clark — Fri, 04 Aug 2017 07:54:08 GMT

OK. So this question has nothing to do with ble_app_uart in particular

This seems to be question about current consumption at 1.8V vs 3.3V ?

I think you need to update your question title to reflect the actual question

RE: about current consumption at 1.8V

Qinghua — Fri, 04 Aug 2017 07:26:17 GMT

Thanks for your reply. But I have a question: when I used 3.3V power supply(DEC2 connected capacitor to the ground), the current is below 30ua. But when I used 1.8V power supply(DEC2 connected 1.8V), the current is always higher than 1mA. I wonder if I overlooked the details? Regarding Low voltage mode, is there any more detailed information?

RE: about current consumption at 1.8V

Roger Clark — Fri, 04 Aug 2017 06:11:40 GMT

No.

nRF5x hardware will operate at 1.8V, and the software is voltage independent.

See