On IN141 Informational Notice v1.1 changes for nRF52840 to revision 3 (build code Fx0) are presented.
One of the changes is "New (optional) filter coefficients for pulse shaping of the TX signal" (for ZigBee). IN-141 mentions: "No consequence unless the filter is activated as described in FTPAN-254". What and where is this FTPAN-254? But does this optionality mean that there is a new register or register value for this pulse shaping? If yes, is there a need to update SW in anyway when changing from earlier HW version of the SoC to Fx0 (nRF52840-QIAA-F)? What if Zigbee was used or not?
It is also mentioned that "The new revision has no impact on ETSI, FCC or Bluetooth certifications unless the new pulse shaping filter is enabled.". Don't you think any change on RF part mean at least FCC Class I permissive change?
