Software porting from "nRF52810 QFN48" to "nRF52810 WLCSP"

[komuro]

I'm thinking of replacing the software that was running on "nRF52810 QFN48, S112" with "nRF52810 WLCSP, S112".
In WLCSP, the pin assignments of XL1, XL2, nRESET, SWDCLK, SWDIO, and UART have been changed.
I think I need to change the software to match the new pin assignments, but how should I configure it?

[Vidar Berg]

Hi,

It's not possible to re-assign XL1, XL2, nRESET, SWDCLK and SWDIO as these pin assigments are fixed (Pin assignments). The UART pinout is configured when it's initialized, but whether it needs to be changed or not is going to depentend on your new board layout.

[komuro]

Thank you for your answer.

Does it mean that the software does not need to be changed when porting to "nRF52810 WLCSP"?
Or does it mean that it can't be transplanted?
* If porting is not possible, is it necessary to make major changes such as replacing the driver layer?

I was also investigating, but it seems that the pin arrangement of the nRESET terminal can be changed by setting PSELRESET, so I am wondering if there is such a setting for other terminals as well.

[Vidar Berg]

Yes, you probably won't have to make any SW changes as long as your new board layout use the same pin assigments for UART, etc.

[komuro]

Thank you very much.
I understand the UART settings now.

The pin assignments of XL1, XL2, nRESET, SWDCLK, SWDIO are different between "nRF52810 QFN48" and "nRF52810 WLCSP".
In "nRF52810 QFN48", external oscillator, reset pin and SWD are used.
I would like to use them in "nRF52810 WLCSP" as well, but if I connect the hardware, can I use them without changing the software except for the register (LFCLKSRC)?

[Vidar Berg]

The physical connections on the die are the same, it's the pin numbering on the chip package that are different. XL1, XL2, nRESET, SWDCLK and SWDIO are going to remain same from a FW perspective, regardless of what package variant you use.