Does Nordic’s proprietary protocol support the 4M PHY layer only on the nRF54 series?

[Ziyao Zhou]

Hi

Does Nordic’s proprietary protocol support the 4M PHY layer only on the nRF54 series?

[Hung Bui]

Hi Zhou, 
I assume you are asking if nRF52 and nRF53 support 4M Phy or not ?
If it's the case then the answer is no. Currently it's only the nRF54 that support 4M Phy. And we don't have a plan to upgrade nRF52 and nRF53. 

[Ziyao Zhou]

By the way, the 128 kbps PHY for nRF54L15 is not available for NCS 3.0.1. Is it available in the future or this PHY is no longer recommended.

[Hung Bui]

Hi Zhou, 
If you have a look at the spec you can find that we don't offer 128 kbps PHY on proprietary mode on nRF54L 
You still can do BLE 128 kbps (CODED PHY).