Silicon Laboratories EFM8UB2-SLSTK2001A User Manual page 12

6.2 Expansion Header
On the right hand side of the board an angled 20-pin expansion header is provided to allow connection of peripherals or plugin boards.
The connecter contains a number of I/O pins that can be used with most of the EFM8UB2 Universal Bee's features. Additionally, the
VMCU, 3V3 and 5V power rails are also exported.
The figure below shows the pin assignment of the expansion header. With the exception of a few pins, most of the expansion header's
pins are the same as those on the EFM32 Gecko or EFM32 Tiny Gecko starter kits.
Some of the chip peripheral functions that are available on the expansion header are listed in the table below.
Peripheral Peripheral pin
UART1 UART1 TX
UART1 RX
SPI0 SPI0 SCK
SPI0 MISO
SPI0 MOSI
SPI0 CS
SMBus SMBus0 SDA
SMBus0 SCL
PCA0 (Cannot PCA0 CEX0
use with
PCA0 CEX1
UART1 if SPI
and SMBus are
PCA0 CEX2
also enabled
due to Crossbar
PCA0 CEX3
priority)
PCA0 CEX4
ADC0 Input
Comparator 0 CMP0P Positive Input Any supported pin (see Reference Manual for more information)
CMP0N Negative In-
put
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Figure 6.2. Expansion Header
Table 6.1. Some Peripheral Functions Available on Expansion Header
MCU Pin
P2.1
P2.2
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P2.1 – P2.2, P2.6 – P3.3
P2.2, P2.6 – P3.3
P2.6 – P3.3
P2.7 – P3.3
P3.0 – P3.3
Any supported pin (see Reference Manual for more information)
Any supported pin (see Reference Manual for more information)
UG241: EFM8UB2-SLSTK2001A User's Guide
Connectors
EXP Header pin
number
12
14
8
6
4
10
16
15
Multiple
Multiple
Multiple
Multiple
Multiple
Multiple
Multiple
Multiple
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