EFM8UB1 Datasheet, PDF (41/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

6.3 EFM8UB1x-QFN20 Pin Definitions
EFM8UB1 Data Sheet
Pin Definitions
P0.1 ¹
P0.0 2
GND 3
D+ 4
D- 5
VDD ₆
20 pin QFN
(Top View)
GND
16 _P0.6
15 P0.7
14 P1.0
13 P1.1
12 GND
11 ^P1.2
Figure 6.3. EFM8UB1x-QFN20 Pinout
Pin
Number
1
Pin Name
P0.1
2
P0.0
Table 6.3. Pin Definitions for EFM8UB1x-QFN20
Description
Multifunction I/O
Crossbar Capability
Additional Digital
Functions
Yes
P0MAT.1
INT0.1
INT1.1
Multifunction I/O
Yes
P0MAT.0
INT0.0
INT1.0
Analog Functions
ADC0.1
CMP0P.1
CMP0N.1
AGND
ADC0.0
CMP0P.0
CMP0N.0
VREF
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