
3. System Overview
3.1 Introduction
The BGM11S product family combines an energy-friendly MCU with a highly integrated radio transceiver. The devices are well suited
for any battery operated application, as well as other system requiring high performance and low-energy consumption. This section
gives a short introduction to the full radio and MCU system. A detailed functional description can be found in the
EFR32BG1 Blue
Gecko Bluetooth® Smart SoC Family Data Sheet
(see general sections and QFN48 2.4 GHz SoC related sections).
A detailed block diagram of the EFR32BG SoC is shown in the figure below which is used in the BGM11S Bluetooth Smart module.
Analog Peripherals
Clock Management
LFXTAL_P / N
LFXO
IDAC
ARM Cortex-M4 Core
Up to 256 KB ISP Flash
Program Memory
Up to 32 KB RAM
A
H
B
Watchdog
Timer
Reset
Management
Unit
Brown Out /
Power-On
Reset
RESETn
Digital Peripherals
Input MUX
Port
Mapper
Port I/O Configuration
I2C
Analog Comparator
12-bit ADC
Temp
Sensor
VREF
VDD
VDD
Internal
Reference
TIMER
CRYOTIMER
PCNT
USART
Port A
Drivers
Port B
Drivers
PAn
Port C
Drivers
PCn
PBn
Port D
Drivers
PDn
LETIMER
RTC / RTCC
IOVDD
AUXHFRCO
HFRCO
ULFRCO
HFXO
Port F
Drivers
PFn
Memory Protection Unit
LFRCO
A
P
B
LEUART
CRYPTO
CRC
DMA Controller
+
-
APORT
Floating Point Unit
Energy Management
DC-DC
Converter
DVDD
VREGVDD
VSS
VREGSW
bypass
AVDD
PAVDD
RFVDD
Voltage
Regulator
DECOUPLE
IOVDD
Voltage
Monitor
VREGVSS
RFVSS
PAVSS
Serial Wire Debug /
Programming
Radio Transciever
2G4RF_IOP
2G4RF_ION
RF Frontend
PA
I
Q
LNA
BALUN
RFSENSE
Frequency
Synthesizer
DEMOD
AGC
IFADC
CRC
BUFC
MOD
FRC
RAC
PGA
HFXTAL_P
HFXTAL_N
Figure 3.1. Detailed EFR32BG1 Block Diagram
3.2 Radio
The BGM11S features a radio transceiver supporting Bluetooth
®
low energy protocol.
3.2.1 Antenna Interface
BGM11S has a built in 2.4GHz ceramic chip antenna or 50 ohm RF pin.
Table 3.1. Antenna Efficiency and Peak Gain
Parameter
With optimal layout Note
Efficiency
-1 to -2 dB
Efficiency and peak gain depend on the application PCB layout
and mechanical design and the used antenna.
Peak gain
1 dBi
BGM11S Blue Gecko
Bluetooth
®
SiP Module Data Sheet
System Overview
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