Raspberry Pi Connector
Pin(s)
Function
Raspberry Pi Pin
33
GPIO (WFM200S RESETn)
BCM 13
34
GND
Ground
35
-
Not Connected
36
SPI_WIRQ
BCM 16
37
SDIO_DAT2
BCM 26
38
-
Not Connected
39
GND
Ground
40
-
Not Connected
4.3 External FEM Connector
The WFM200S Wi-Fi Expansion Kit features a 2x5-pin 0.1" pitch connector exposing the WFM200S Wi-Fi Transceiver Module's exter-
nal front-end module (FEM) interface, which allows the connection of an external FEM board using a ribbon cable.
The WFM200S Wi-Fi Expansion Kit also features a TX/RX activity indicator LED which is connected to the FEM_5 signal. By default, to
optimize power consumption, TX/RX activity LED is not enabled. PDS sections PROG_PINS_CFG and FEM_CFG should be updated
to enable this functionality.
The pinout of the connector is illustrated in the figure below.
GND
FEM_PDET
FEM_6
FEM_5
VMCU_NCP
FEM_4
FEM_3
VMCU_NCP
9
8
7
10
6
5
4
3
1
2
FEM_2
FEM_1
Figure 4.4. External FEM Connector
4.3.1 External FEM Connector Pinout
The pin assignment of the external FEM connector on the board is given in the table below.
Table 4.3. External FEM Connector Pin Descriptions
Pin Number
WFM200S Connection
1
VMCU_NCP
2
VMCU_NCP
3
FEM_5
4
FEM_1
5
FEM_6
6
FEM_2
7
GND
8
FEM_3
9
FEM_PDET
10
FEM_4
UG407: WFM200S Wi-Fi
®
Expansion Kit User's Guide
Connectors
silabs.com
| Building a more connected world.
Rev. 1.0 | 13
