How to set nRF54L device SWD multidrop instance ID?

[Tomas Vanek]

Hi all,

I searched nRF54L PRELIMINARY DATASHEET v0.8 and found

9.1.1.2 DLPIDR:

TINSTANCE field description reads "This value is set by the UICR.TINSTANCE register."

This would be similar to nRF53 but on nRF54L there is no such register listed in 4.2.9 UICR

On the other hand in 9.8.1.5 TINSTANCE:

TAD.TINSTANCE r/w field description reads
 "TINSTANCE bits are used in the SW-DP DLPIDR.TINSTANCE field."

Writing to TAD.TINSTANCE generates SWD FAULT response and the written
value does not appear neither in TINSTANCE field readback nor in DLPIDR.TINSTANCE

Is the device capable to change the SWD multidrop instance ID somehow?

Thanks

[ketiljo]

Multidrop isn't possible at the moment since there is an issue writing to TAD.TINSTANCE.