Compute Module IO Board Schematic - Raspberry Pi Forums

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regarding pam2306 multi-output dc-dc converter circuit (compute module io board v3.0):
- r22, r23 have value of 0r (jumpers)
- c21, c22, r24, r25 have value of nf
nf stand for?
also, purpose circuit serve, when necessary , how component values determined?
lastly, pp stand for? probe point?? used electrical checks of pcb during production?
thanks!

"nf" stands "not fitted" - i.e. no component should placed there, , remains open-circuit.
"pp" test point - think stands "probe point".

else have explain function of circuit.


raspberrypi



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