About the DECD and DECR terminals of the nRF5340

[Junichi]

What effect does it have if no capacitors are connected to the DECD and DECR terminals of the RF5340?

When initializing Bluetooth, an error occurs.

[Kenneth]

Hello,

Both I can see are internal regulator supply decoupling, if you have not mounted any capacitors I suspect instability and oscillation in the regulators, very likely this can cause a range of issues (e.g. noise and ripples that will affect in specific the analog circuitry, such as radio).

Kenneth