Silicon Laboratories Gecko MGM210P, Manual, Page: 6 / 50

3. System Overview
3.1 Block Diagram
The MGM210P module is a highly-integrated, high-performance system with all the hardware components needed to enable 2.4 GHz
wireless connectivity and support robust networking capabilities via multiple protocols.
Built around the EFR32MG21 Wireless Gecko SoC, the MGM210P includes, both, a built-in antenna and a 50 Ω-matched RF pin, RF
matching networks (optimized for transmit power efficiency), supply decoupling and filtering components, a 38.4 MHz reference crystal,
and an RF shield. Also, it allows using an external 32 kHz crystal as a low frequency reference signal via GPIO pins. A 32.768 kHz
crystal provides an accurate timing reference for low energy modes.
Since the RF matching networks are optimized for transmit power efficiency, modules rated for +20 dBm will show non-optimal current
consumption and performance when operated at a lower output power (e.g. +10 or 0 dBm). The same applies for modules rated for +10
dBm.
IOVDD
RFPIN
Silicon Labs
EFR32MG21
HF XTAL
Supply Decoupling
RF SHIELD
VDD
GPIO
GND
(up to 20)
RF Match
RF Match
Antenna
External LF XTAL option
Figure 3.1. MGM210P Block Diagram
3.2 EFR32MG21 SoC
The EFR32MG21 SoC features a 32-bit ARM Cortex M33 core, a 2.4 GHz high-performance radio, 1 MB of Flash memory, a dedicated
core for security, a rich set of MCU peripherals, and various clock management and serial interfacing options. Consult the
EFR32xG21
Wireless Gecko Reference Manual and the EFR32MG21A Data Sheet for details on the Secure Vault Mid MGM210PAxx devices. For
MGM210PBxx devices with the Secure Vault High feature, consult the EFR32MG21B Data Sheet .
3.3 Antenna
MGM210P modules include a built-in antenna with the characteristics detailed in the table below. They also include a 50 Ω-matched RF
pin to enable the use of an external antenna instead of the one built-in. See Section
4.17.1 Antenna Radiation and Efficiency and Sec-
tion 11.1 Qualified Antennas for other relevant details. Antenna diversity is not supported.
Table 3.1. Antenna Efficiency and Peak Gain
Parameter With optimal layout Note
Efficiency -1 to -2 dB Antenna efficiency, gain and radiation pattern are highly depend-
ent on the application PCB layout and mechanical design. Refer
to the
Design Guidelines for recommendations to achieve optimal
antenna performance.
Peak gain 1.86 dBi
MGM210P Wireless Gecko Multi-Protocol Module Data Sheet
System Overview
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