Mistake in nrf52840 Product Specification 1.7 about INFO.VARIANT ?

[Tim]

Hi,

In the nRF52840 Product Specification 1.7, page 34 chapter 4.4.1.9 INFO.VARIANT, I read that the hex code of variant "AAF0" is 0x41414530. However the description says "Encoded as ASCII" and the ASCII form of '45' is letter E => AAE0. 

This is confusing, especially since when I open a debug session and check in the MCU's peripherals I can see 0x41414630 which matches 'F0'. 

Is this a mistake in the specification ? 

Here's what it looks like in the spec : 

And in the MCU's register at runtime:

By the way I'm surprised to see a 'FA' variant, I thought that by having 'F0' we had the latest one. What are the differences between both ? In the Errata I see 3, two linked with Bluetooth Long Range and one linked with TASKS_CALIBRATEOFFSET. Is it correct or I'm not looking at the right place ? 

Thanks for any help you can provide. 

Tim

[Einar Thorsrud]

Hi Tim,

Thanks for reporting the typo in the product specification. I have forwarded it to the technical writers.

Regarding the 'FA' and 'F0' variants, 'F0' is the most recent. When there is a letter in this position that means it is an engineering version, and when it goes to production it changes to a digit. (Some of these engineering versions are public and some are not, but the coding scheme is the same regardless).

Einar