How to find out nrf 52840 revision

[LSz]

Hello,
I am trying to find out my nrf 52840 chip revision.
I have tried using the NRF_FICR register but I couldn't find the revision there. I found that the variant is AAD0 but I don't see it in this table:https://infocenter.nordicsemi.com/topic/comp_matrix_nrf52840/COMP/nrf52840/nRF52840_ic_revision_overview.html 

Can someone explain to me what does AAD0 means and how it helps me to check the chip revision?
Is there another register I should check?

thanks.

[Jared]

Hi,

AAD0 means that you have a revision 2, which can either be a aQFN73 or a WLCSP package.

regards

Jared 

[Johan]

I have on top of chip these:
N52840  - line 1
QIAAD0  - line 2
2102UH  - line 3

Line 2: "QIAA" matches lots of revisions.
Using also Line 2: "D0" - it does not match either Engineering D or revision 2.
So which one is it I have?

Why isn't your docs usable with what you print on the chips? That's a needed improvement.

[Jared]

Hi,

Johan said:

N52840  - line 1
QIAAD0  - line 2
2102UH  - line 3

 QI = Package variant code == aQFN

AA = Function variant code == 1024(Flash) & 256 (RAM)

Build code{

D = Hardware revision code

0 = Production configuration code }

2102UH = Tracking code == Year 2021, Week 2, Wafer lot UH

Comparing this with the combability matrix I can see that you have revision 2. 

Johan said:

Why isn't your docs usable with what you print on the chips? That's a needed improvement.

See this part.

regards

Jared 

[Johan]

Thank you Jared!

[Abdull]

Excuse the nitpicking: why does the documentation say:

"Dx0. The "x" represents a digit between 0 and 9"

when actual devices (including marketing material die photos) don't follow this scheme, e.g. QIAAD0?

Or is "Dx0" a mistake, and it should instead say "Dx"?

(Updated) links for reference:

• nRF52840 SoC revisions and variants: https://docs.nordicsemi.com/bundle/comp_matrix_nrf52840/page/COMP/nrf52840/nRF52840_ic_revision_overview.html

• nRF52840 device marking documentation: https://docs.nordicsemi.com/bundle/ps_nrf52840/page/ordering_info.html#ariaid-title2