RE: Minimizing ESB latency on nRF54L15

Håkon Alseth — Fri, 28 Nov 2025 08:34:19 GMT

Hi,

With nRF52-series and newer, you can set:

config.use_fast_ramp_up = true;

without having CONFIG_ESB_FAST_SWITCHING enabled/set. Fast switching is a even reduced timing when doing turn-around (TX->RX or RX->TX) on nRF54-series devices.

I see that this is guarded in the samples at this time:

https://github.com/nrfconnect/sdk-nrf/blob/main/samples/esb/esb_ptx/src/main.c#L167-L169

However, this lacks a proper comment on why, which I will bring up internally with the ESB team.

Kind regards,

Håkon