Datasheet

34
8. Reference Circuit
This chapter shows a different combination of reference circuits. Before getting started,
please read below notes carefully because it is applied to all the reference circuits.
⚫ 32MHz crystal and RF (VDD) DC/DC inductor (Reg1) are already inside the module.
⚫ Module is pre-programmed with Raytac testing code. Default is using DC-DC mode
and need to add external 32.768khz to work.
You can use DC-DC mode without adding external 32.768khz, they are NOT related
events.
⚫ When using internal 32.768khz RC oscillator, please remove X2 / C12 / C13.
⚫ Recommended L4 spec: 10𝛍H, 0603 Chip Inductor, IDC, min = 80mA, ±20%.
⚫ When NOT using NFC, please remove NFC1 / C19 / C21.