Quectel SC20 Series Hardware Design page 44

Smart Module Series
The following are two USB interface reference designs for you to choose from.
Figure 13: USB Interface Reference Design (OTG is not Supported)
Figure 14: USB Interface Reference Design (OTG is Supported)
SC20 series supports OTG protocol. If OTG function is needed, see the above figure for the reference
design. AW3605DNR is a high efficiency DC-DC chip manufactured by AWINIC, and you can also choose
a suitable one according to your own demands.
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