MCU can't be recognised

[ErnestasTELT]

We are using NRF51822 MCU on our PCB design and we have a problem that we can’t program it, uKeil doesn’t recognize MCU. It seems that then we start programing NRF51822 it stays in reset mode, because before start of programing it sink 3mA current and after the start it sinks 0.3mA.

[Håkon Alseth]

Hi,

 

What programmer (and what software to program) are you using?

Some programmers have a set voltage requirement (3.3V), and will not work with lower voltages.

Kind regards,

Håkon