Regarding the PAM2306 multi-output DC-DC converter circuit (Compute Module IO Board v3.0):
- R22, R23 have a value of 0R (jumpers)
- C21, C22, R24, R25 have a value of NF
What does NF stand for?
Also, what purpose does this circuit serve, when would it be necessary and how would the component values be determined?
Lastly, what does PP stand for? Probe point?? Used for electrical checks of the PCB during production?