Silicon Laboratories EFM8LB1-SLSTK2030A User Manual page 11

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 Laser 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
I2CSLAVE0 I2CSLAVE0 SDA
I2CSLAVE0 SCL
ADC0 Input
CNVSTR
Comparator 0 CMP0P Positive Input Any supported pin (see Reference Manual for more information)
CMP0N Negative In-
put
Comparator 1 CMP1P Positive Input Any supported pin (see Reference Manual for more information)
CMP1N Negative In-
put
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Figure 6.2. Expansion Header
Table 6.1. Some Peripheral Functions Available on Expansion Header
MCU Pin
P2.0
P2.1
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P2.0
P2.1
Any supported pin (see Reference Manual for more information)
P0.6
Any supported pin (see Reference Manual for more information)
Any supported pin (see Reference Manual for more information)
UG126: EFM8LB1-SLSTK2030A User's Guide
Connectors
EXP Header pin
number
12
14
8
6
4
10
16
15
12
14
Multiple
8
Multiple
Multiple
Multiple
Multiple
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