Issue with flashing of nRF52810QFAA Device

[Umesh]

I am facing issue with programming of own developed nRF52810QFAA board. I used Pins 25 (clock) and 26 (data) along with Vcc and Gnd to flash device. I tried with two boards but same issue as mentioned below using Segger while debug mode and using JFlah. Even Erase of Chip is not allowed. Error Is:

Failed to connect to target.
No idcode detected.
Please check connection and Target Interface Type

When checked with DSO for Clock and Data signal,. I observed some data going to controller. Please suggest if any other issue if applicable.

[Øyvind]

Hello,

I can't see anything wrong with your connection. Can you please provide some more information i.e. output from JFlash? What Segger are you using? What is the voltage of the device? How is the target device powered?

Thank you!

Kind regards,
Øyvind

[Umesh]

Hello, 

Please check below inputs:

What is the voltage of the device? > 3.12V

How is the target device powered > Onboard regulator 3.12V

What Segger are you using? EDU Jlink Segger

output from JFlash? Mainly Data (with pull up connected), Clock, Gnd and Vcc. when same connections are used to program nRF52832QFAA then it works. But not with nRF52810 device.

[Umesh]

Note: for above layout top and bottom copper (GND) layers is removed for better visibility

[Umesh]

As per reference schematic pin 32 DEC2 shall be free. 

1. Is connecting 0.1uF capacitor is wrong here (voltage observed is ~1.2V o this pin)?

2. When checked with Crystal Pins 34/35 there is no signal present. Does it is due to continue reset?

[Umesh]

3. Voltage rise time of regulator  to reach 3.2V on

 Working board > 800us

Non Working Board > 400us

 Does this voltage startup tie causes issue?

[Umesh]

Below is the crystal part number difference:

Working board : Crystal 32MHz > CX2016DB32000D0WZRC1  (with 12pf capacitor)

Non Working board : Crystal 32MHz > XRCGB32M000F2P01R0 (with 12pf capacitor)

[Øyvind]

Can you please provide the whole PCB layout?

[Umesh]

I am also trying to replace the Crystal with same part number as given in thingy.

[Umesh]

Even after replacing the crystal with same part number as given in Thingy .. still issue persist. 

One major change is done this PCB is that PIN 47 DCC is not used but its present in working board.

[Øyvind]

I am not able to help without the whole PCB layout and schematics. Please provide these files so that I can review.

Can you please provide the project you are programming as well?

Kind regards,
Øyvind

[Umesh]

SlaveSensor_V1.0.7z

[Øyvind]

Thank you! I will discuss your layout/schematic with an HW specialist.

Just to get me back to speed with your case:

1. You are able to flash and debug both devices?
2. Have you enabled DCDC? This should be disabled as you are not using it. Ref. DCDC reference schematic
3. Have you debugged your code to see when it resets? What error are you receiving?
4. Please give a current status after the changes you have tried.

Thanks!
-Øyvind