EFM8UB1 Datasheet, PDF (34/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

6. Pin Definitions
6.1 EFM8UB1x-QFN28 Pin Definitions
EFM8UB1 Data Sheet
Pin Definitions
P0.1 1
P0.0 2
GND 3
D+ 4
D- 5
VDD 6
VREGIN 7
28 pin QFN
(Top View)
GND
21 P1.1
20 P1.2
19 P1.3
18 P1.4
17 P1.5
16 P1.6
15 P1.7
Pin
Number
1
Pin Name
P0.1
Figure 6.1. EFM8UB1x-QFN28 Pinout
Table 6.1. Pin Definitions for EFM8UB1x-QFN28
Description
Multifunction I/O
Crossbar Capability
Additional Digital
Functions
Yes
P0MAT.1
INT0.1
INT1.1
Analog Functions
ADC0.1
CMP0P.1
CMP0N.1
AGND
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