EFM8UB1 Datasheet, PDF (32/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

EFM8UB1 Data Sheet
Typical Connection Diagrams
5.2 USB
Figure 5.4 Bus-Powered Connection Diagram for USB Pins on page 31 shows a typical connection bus-powered diagram for the USB
pins of the EFM8UB1 devices including ESD protection diodes on the USB pins.
USB
Connector
VBUS
D+
D-
Signal GND
EFM8UB1 Device
VREGIN
D+
D-
SP0503BAHT or
equivalent USB ESD
protection diodes
(Recommended)
GND
USB
Figure 5.4. Bus-Powered Connection Diagram for USB Pins
Figure 5.5 Self-Powered Connection Diagram for USB Pins on page 31 shows a typical connection self-powered diagram for the USB
pins of the EFM8UB1 devices including ESD protection diodes on the USB pins.
USB
Connector
VBUS
D+
D-
Signal GND
EFM8UB1 Device
P3.1 / VBUS
D+
D-
SP0503BAHT or
equivalent USB ESD
protection diodes
(Recommended)
GND
USB
Figure 5.5. Self-Powered Connection Diagram for USB Pins
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