NRF52832 SDK15 SD132 V6.0 sleep mode enter

[Andrew_Engineer]

Hello Nordic Guys

We are trying to run ble_app_uart example on our custom hardware. SDK 15, SD132V6.0 . Problem what we experiencing is: NRD chip never goes to sleep, it reaches sd_power_system_off(); and resets within function. We think it is hardware related issue, because same code (in fact it is an example from SDK without any modifications) runs perfectly on NRF52 development board.

Schematic attached for the reference.

marking on the chip :

N52832

QFAAB0

1745JY

Can you please advise if it valid chip marking? and anything else what we can do, to address this issue.

Thank you,

Andrew

[haakonsh]

Hey Andrew,

Can you provide the layout as well? 

Cheers,

Håkon.

[Andrew_Engineer]

hi Håkon,

please see attached top and bottom layers. board has 4 layers. 

Top routing

IN2 GND

IN3 PWR (3V)

Bottom routing

Regards,

Andrew.

[haakonsh]

Hey Andrew, sorry for the long wait, we're a bit short staffed during the summer vacation. 

I need the gerber + Nc drill, Altium, or Allegro files in order to see the grounding properly. 

What I can tell you now is that you do have a problem with your antenna as you're missing the antennas matching network. 

[Andrew_Engineer]

Hi Håkon,

 

Thank you for your reply.

1. I dont have Altium, or Allero files, I can put screen capture for inner layers

2. you mentioned about antenna matching:  is it C54, L5, C55 is not enough? also, how antenna matching network can affect device not able to go to sleep?

Please advise.

Andrew

[Andrew_Engineer]

Hi Håkon,

Do you have any updates?

Please advise at your earliest convenience?

Regards,

Andrew

[Andrew_Engineer]

Hi Håkon,

can you please see bellow and advise.

Do you have any updates?

Please advise at your earliest convenience?

Regards,

Andrew

[haakonsh]

I need gerbers and drill files, screen capture is not enough