
3. System Overview
3.1 Introduction
The BGM13S product family combines an energy-friendly MCU with a highly integrated radio transceiver and a high performance, ultra
robust antenna. The devices are well suited for any battery operated application, as well as other system where ultra-small size, reliable
high performance RF, low-power consumption and easy application development are key requirements. This section gives a short intro-
duction to the full radio and MCU system.
A detailed block diagram of the BGM13S module is shown in the figure below.
Analog Peripherals
Clock Management
HFRCO
IDAC
ARM Cortex-M4 Core
512 KB ISP Flash
Program Memory
64 KB RAM
A
H
B
Watchdog
Timer
RESETn
Digital Peripherals
Input Mux
Port
Mapper
Port I/O Configuration
Analog Comparator
12-bit ADC
Temp
Sense
VDD
Internal
Reference
IOVDD
ULFRCO
LFXO
HFXO
Memory Protection Unit
LFRCO
A
P
B
DMA Controller
+
-
APORT
Floating Point Unit
Energy Management
PAVDD / RFVDD / DVDD
VBATT
bypass
VREGVDD / AVDD
IOVDD
VDAC
+
-
Op-Amp
Capacitive
Touch
LESENSE
CRC
CRYPTO
I2C
LEUART
USART
RTC / RTCC
PCNT
CRYOTIMER
TIMER
LETIMER
Port F
Drivers
PFn
Port D
Drivers
PDn
Port C
Drivers
PCn
Port B
Drivers
PBn
Port A
Drivers
PAn
Mux & FB
DC-DC
Converter
Debug Signals
(shared w/GPIO)
Brown Out /
Power-On
Reset
Reset
Management
Unit
Serial Wire
and ETM
Debug /
Programming
AUXHFRCO
Radio Transciever
RF Frontend
PA
I
Q
LNA
BALUN
Frequency
Synthesizer
DEMOD
AGC
IFADC
CRC
BUFC
MOD
FRC
RAC
PGA
Antenna
Chip
Antenna
Matching
1V8
Voltage
Regulator
Voltage
Monitor
Internal Crystal
38.4 MHz Crystal
LFXTAL_P
LFXTAL_N
Figure 3.1. BGM13S Block Diagram
3.2 Radio
The BGM13S features a radio transceiver supporting Bluetooth
®
low energy protocol.
3.2.1 Antenna Interface
The BGM13S has two antenna solution variants. One of them is a high-performance integrated chip antenna (BGM13SxxFxxxxA) and
the other is a 50 Ohm matched RF pin to attach an external antenna to the module (BGM13SxxFxxxxN).
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 for PCB layout and antenna integration guidelines for optimal
performance.
Peak gain
1 dBi
BGM13S Blue Gecko
Bluetooth
®
SiP Module Data Sheet
System Overview
silabs.com
| Building a more connected world.
Rev. 1.0 | 7