BGM121 Datasheet, PDF (51/96 Pages) Silicon Laboratories – IoT end devices and gateways

BGM121/BGM123 Blue Gecko Bluetooth ^® SiP Module Data Sheet
Pin Definitions
Table 7.1. Device Pinout
Pin #
1
2
3
4
5
6
23
24
25
26
27
28
29
30
31
32
47
48
49
50
51
52
53
54
55
56
Pin Alternate Functionality / Description
Pin Name
Analog
Timers
Communication
Radio
Other
RESETn
Reset input, active low.To apply an external reset source to this pin, it is required to only drive this pin low
during reset, and let the internal pull-up ensure that reset is released.
GND
Ground
GND
Ground
2G4RF_ANT_
IN
50 ohm input pin for the internal 2.4GHz antenna
2G4RF_POR
T
50 ohm 2.4GHz RF input and output
GND
Ground
DNC
Do not connect but leave floating
DNC
Do not connect but leave floating
GND
Ground
V_BATT 1.85 - 3.8VDC input to the internal DC-DC converter and AVDD.
GND
Ground
V_1V8
1.8V output of the internal DC-DC converter. Internally decoupled so do not use an external decoupling ca-
pacitor.
GND
Ground
DNC
Do not connect but leave floating
V_IOVDD Digital I/O power supply.
GND
Ground
GND
Ground
HFXO_IN 38.4MHz XTAL input. Connect to HFXO_OUT.
HFXO_OUT 38.4MHz XTAL output. Connect to HFXO_IN.
GND
Ground
GND
Ground
GND
Ground
ANT_GND Antenna ground
GND
Ground
GND
Ground
GND
Ground
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