NRF9160 custom board programming issue

RE: NRF9160 custom board programming issue

Øyvind — Tue, 30 Apr 2019 13:39:01 GMT

[quote user="damianogiacomi"]I have a question about what should be the reset pin impedance ?[/quote]

It's a standard input with an internal pull-up of about 10kOhm.

RE: NRF9160 custom board programming issue

Øyvind — Tue, 30 Apr 2019 12:56:58 GMT

[quote user="damianogiacomi"]I am using the segger embedded studio and when I compile the solutin and try to connect the jlink it returns this, sorry for asking but where should I use this command? [/quote]

You run this using command prompt or similar.

[quote user="damianogiacomi"]The reset pin was not connected right, not it connects but it gives this hardfault exeption in the debugger[/quote]

Difficult for me to say with little information. A hard fault usually means that you are writing to an area you are not allowed in your code. What are you trying to run? Is this a sample project or your own code?

[quote user="damianogiacomi"]I have a question about what should be the reset pin impedance ?[/quote]

I don't have these numbers at the moment, will ask our internal team.

BR,
Øyvind

RE: NRF9160 custom board programming issue

damianogiacomi — Mon, 29 Apr 2019 14:02:55 GMT

I have a question about what should be the reset pin impedance ?

RE: NRF9160 custom board programming issue

damianogiacomi — Fri, 26 Apr 2019 12:41:37 GMT

The reset pin was not connected right, not it connects but it gives this hardfault exeption in the debugger

RE: NRF9160 custom board programming issue

damianogiacomi — Fri, 26 Apr 2019 10:23:52 GMT

I am using the segger embedded studio and when I compile the solutin and try to connect the jlink it returns this, sorry for asking but where should I use this command?

Thanks for the temperature hint I will probably design a different board but I would like to check if what I am doing is correct :)

RE: NRF9160 custom board programming issue

Øyvind — Fri, 26 Apr 2019 10:18:51 GMT

Where did you get this information?

What do you get if you run:

nrfjprog -i

One comment I forgot to mention yesterday, is that you need to check the temperature of the SiP. Having only one ground connection will make the device run hot, and this may break it.

Kind regards,
Øyvind

RE: NRF9160 custom board programming issue

damianogiacomi — Fri, 26 Apr 2019 09:54:07 GMT

Hi ok thanks for the advice, now somehow i menaged to obtain this:

Found Cortex-M33 r0p2, Little endian.
FPUnit: 0 code (BP) slots and 0 literal slots
Security extension: not implemented
CoreSight components:
ROMTbl[0] @ E00FF000
Target connection has been lost

Any hints ;)

RE: NRF9160 custom board programming issue

Øyvind — Thu, 25 Apr 2019 11:41:40 GMT

Thanks for the layout.

You have to redo the ground beneath the nRF9160 SoC. This is not good I'm afraid. You are only grounded through pin 60, and lacking many vias under the module. The rest of the pads are not connected at all to GND. This may be the reason for why you are having issues with your custom board.

This is how is done on the nRF9160 DK

Please follow design rules given in the Schematics and layout for nRF9160DK.

I would also recommend verifying the via hole dimensions with your PCB manufacturer, as they seem somewhat small.

Kind regards,
Øyvind

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 10:22:17 GMT

I don't really know what to check next

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 09:46:27 GMT

Yes there is 3.3v on the vdd

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 09:42:09 GMT

devzone.nordicsemi.com/.../nRF9160_5F00_PB.PcbDoc

RE: NRF9160 custom board programming issue

Øyvind — Thu, 25 Apr 2019 09:39:45 GMT

Thanks for the schematic. I am not able to see anything wrong with it. Can you please provide the layout as well?

Have you measured the voltage on VDD when pin 12 is connected and disconnected?

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 09:11:12 GMT

devzone.nordicsemi.com/.../nRF9160_5F00_PB.SchDoc

RE: NRF9160 custom board programming issue

Øyvind — Thu, 25 Apr 2019 08:44:18 GMT

I'm sorry, but the image is too small for me to read. Please upload the file using Insert -> Insert Image/Video/File.

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 08:33:00 GMT

RE: NRF9160 custom board programming issue

Øyvind — Thu, 25 Apr 2019 08:21:46 GMT

Please see chapter 5.3.2 VDD supply rail in the nRF9160 DK User Guide (Download pdf)

On the DK itself, the VDD is connected via a buck regulator which is regulated by VDD_IO (SW11) (3V or 1.8V)

RE: NRF9160 custom board programming issue

Øyvind — Thu, 25 Apr 2019 08:13:34 GMT

Hello,

[quote user=""] I have my custom board for the nrf9160[/quote]

I just realized that I missed this detail in my last reply. Can you please provide schematics and layout for your custom board, so I can review?

[quote user="damianogiacomi"]I have also noticed that on the dk the vdd is 5 volts and on the vdd_GPIO is 3v why is that? Has it to be like that ? It,s not mentioned in the datasheet[/quote]

This is stated in the power and clock management chapter, found here. This chapter refers to the Recommend operating conditions, where VDD_GPIO has an operating range of 1.7V to 3.6V

Kind regards,
Øyvind

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 07:37:43 GMT

I have also noticed that on the dk the vdd is 5 volts and on the vdd_GPIO is 3v why is that? Has it to be like that ? It,s not mentioned in the datasheet

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 07:15:46 GMT

But when I disconnect the pin 12 from VDD it programs but then I am not able to use GPIOs

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 07:14:54 GMT

This is how is connected, the pin 12 has 3.3V but it doesn't want to program.

RE: NRF9160 custom board programming issue

damianogiacomi — Thu, 25 Apr 2019 07:12:57 GMT

RE: NRF9160 custom board programming issue

Øyvind — Tue, 23 Apr 2019 13:41:19 GMT

Hello,

[quote user=""] when I connect the VDD to the VDD_GPIO by soldering a bridge the programmer does not recognize the board, [/quote]

What is VDD_IO (SW11) configured to? It should be configured to 3V to be able to program.

Kind regards,
Øyvind