What is the difference between ppib and dppic?

Hello,

I am trying to use the nRF21540 in nRF54L15, I notice document metion

Enable appropriate instances of the DPPIC and PPIB peripherals in the devicetree file:

Explain this code
Copy
Copy&dppic10 {
      status = "okay";
};

&ppib11 {
      status = "okay";
};

&ppib21 {
      status = "okay";
};

&dppic20 {
      status = "okay";
};

&ppib22 {
      status = "okay";
};

&ppib30 {
      status = "okay";
};

&dppic30 {
      status = "okay";
};

I am wondering what is the difference between PPIB and DPPIC. What does appropriate mean? How to choose the correct one. If I open all the node I will got an fatal error below：