RX_TTCKO update after frame demodulation

Dear all,

According to the DW1000 user manual, page 100: “The RX_TTCKO register contains the following sub-fields which are updated when a frame demodulation is completed successfully”.
I would like to ask why does the transceiver need to wait until a successful frame demodulation to update this register and if there is any way to bypass it, i.e., update this register (or at least the RCPHASE) BEFORE completing the frame demodulation.

Best,