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.

[Øyvind]

Hi,

Umesh said:

output from JFlash? Mainly Data (with pull up connected)

 I need the data itself. There might be some clues there. You must copy and paste here.

own developed nRF52810QFAA board

 Could you please provide the schematics for this board, perhaps there are some connections /values that are wrong.

Thank you.

Kind regards,
Øyvind

[Øyvind]

Umesh said:

same connections are used to program nRF52832QFAA then it works

 Also, how is the nRF52832 mounted? Is this on the same board?

[Umesh]

Now both Controller  810/823 are getting flashed and started debugging also. I verified all VCC capacitors value and dry solder of VCC Pins. 

Now again issue I am facing it that, controller getting reset while BLE initialization. 

In this board I can use 832/810 controller. 

In my previous board for 832; which is working fine with BLE and also good range up to 50m is reference for me. In this reference board I used DC DC pins (46/47).

In new board which is getting reset while BLE init dont have DC DC pin used. Only pin 46 is connected to 1uF capacitor.

Is there any issue with this?

Do I need to disable DC-DC regulator from software (register DCDCEN)?

Please have a look a MCU schematic and capacitor values.

[Umesh]

[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)