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CC1352P: What determines TX port selection ?

Part Number: CC1352P

The CC1352 goes up to 14dBm @ 900MHz. The CC1352P has the added PA and goes up to 20dBm @ 900MHz. I'm assuming that if you set the output power @ 14dBm or less, the TX signal will automatically come out of the RF_P_SUB1GHZ & RF_N_SUB1GHZ pins and if you set the output power higher than 14dBm, the TX signal will automatically come out of the TX_20DBM_P & TX_20DBM_N pins.  Is this assumption correct ?  Or is TX port selection manually configured via SW ?