Difference between NRF5340-QKAA-R7 and NRF5340-QKAA

[Fabrice@]

Dear Nordic Team,

I am writing to inform you that I have successfully completed my algorithm using the NRF5340 and i want to redesign the board based on the schematic provided on the website. It indicates that the chip itself is labeled NRF5340-QKAA.

However, I am curious about the difference between NRF5340-QKAA-R7 and NRF5340-QKAA. Do they possess the same functionality?

Your clarification on this matter would be greatly appreciated.

Regards,
Fabrice

[Fabrice@]

Thank you Kenneth my second question is , what are the difference between these 2 USB circuit ?? i have tried to connect the nRF USB (J3) but my board is not going on but once connect the USB on port J2 it is powered on. what are the difference between these 2 USB port

[Kenneth]

Hello,

You can find a description on how to work with the nRF5340-DK here:
https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/intro.html

For all new nRF DK's there is an on-board debugger used to program and debug the actual nRF device that the DK is made for. This on-board debugger/programmer (sometimes referred to as the interface MCU) is by coincidence also an nRF5340, so for the nRF5340-DK there is an nRF5340 used to program and debug an nRF5340.

Kenneth

[Kenneth]

It's just to avoid an external programmer/debugger, once programmed the nRF5340 will run whatever program is programmed.

Kenneth

[Fabrice@]

Thank you  Kenneth  , how does the  Interface MCU and nrf5340 are connected ?? i can't see any physical connections on both ship 

[Kenneth]

I can see them on the picture you shared when you started the case, look for "IMCU_".

Kenneth

[Fabrice@]

I mean the physical connection between Interface MCU and Nrf5340 soc, i can't see any wire connection between them

[Kenneth]

Electrical connectivity between schematic component pins can be created by placing a wire between those pins. This is called physical connectivity since the pins are physically connected with a wire. Connectivity also can be created logically by using suitable net identifiers, such as net labels. As well as providing a human-friendly identifier for a net, a net label allows you to connect points on a circuit without actually physically wiring them together.

Kenneth