EFM8UB2 Datasheet, PDF (23/50 Pages) Silicon Laboratories – The EFM8UB2 highlighted features are listed below

Pin
Number
1
Pin Name
P0.5
2
P0.4
3
P0.3
4
P0.2
5
P0.1
6
P0.0
7
GND
8
D+
9
D-
10
VDD
11
VREGIN
12
VBUS
13
RST /
C2CK
14
C2D
15
P4.7
16
P4.6
17
P4.5
Table 6.1. Pin Definitions for EFM8UB2x-QFP48
Description
Multifunction I/O
Multifunction I/O
Multifunction I/O
Crossbar Capability
Additional Digital
Functions
Yes
UART0_RX
INT0.5
INT1.5
Yes
UART0_TX
INT0.4
INT1.4
Yes
INT0.3
INT1.3
Multifunction I/O
Yes
Multifunction I/O
Yes
Multifunction I/O
Yes
Ground
USB Data Positive
USB Data Negative
Supply Power Input /
5V Regulator Output
5V Regulator Input
USB VBUS Sense Input
Active-low Reset /
C2 Debug Clock
C2 Debug Data
Multifunction I/O
Multifunction I/O
INT0.2
INT1.2
INT0.1
INT1.1
INT0.0
INT1.0
VBUS
EMIF_D7
EMIF_AD7m
EMIF_D6
EMIF_AD6m
Multifunction I/O
EMIF_D5
EMIF_AD5m
EFM8UB2 Data Sheet
Pin Definitions
Analog Functions
ADC0P.18
ADC0N.18
CMP0N.4
ADC0P.17
ADC0N.17
CMP0P.4
ADC0P.34
ADC0N.34
ADC0P.15
ADC0N.15
CMP1N.3
ADC0P.14
ADC0N.14
CMP1P.3
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