BGM121/BGM123 Blue Gecko Bluetooth ®
SiP Module Data Short
The BGM121/BGM123 Blue Gecko Bluetooth ® SiP Module family is targeted for appli-
cations where ultra-small size, reliable high performance RF, low-power consumption
and easy application development are key requirements.
At 6.5 x 6.5 x 1.4 mm the BGM121/BGM123 module fits applications where size is a con-
straint. BGM121/BGM123 also integrates a high performance, ultra robust antenna,
which requires minimal PCB, plastic and metal clearance. The total PCB area required
by BGM121/BGM123 is only 51 mm2.
The BGM121/BGM123 also integrates a Bluetooth 4.2 compliant Bluetooth stack and it
can also run end-user applications on-board or alternatively used as a network co-pro-
cessor over one of the host interfaces.
BGM121/BGM123 SIP modules can be used in a wide variety of applications:
KEY FEATURES
• Bluetooth 4.2 low energy compliant
• Integrated antenna or RF pin
• TX power up to 8 dBm
• RX sensitivity: -90 dBm
• Range: up to 200 meters
• 32-bit ARM® Cortex®-M4 core at 38.4
MHz
• Flash memory: 256 kB
• RAM: 32 kB
• Autonomous Hardware Crypto Accelerator
and Random Number Generator
• Integrated DC-DC Converter
• Onboard Bluetooth stack
• Wearables
• IoT end devices and gateways
• Health, sports and wellness devices
• Industrial, home and building automation
• Smart phone, tablet and PC accessories
• Beacons
Timers and Triggers
RTCC
Cryotimer
Timer/Counter
Low energy timer
Pulse Counter
Watchdog Timer
Protocol Timer
32-bit bus
Peripheral Reflex System
Serial Interfaces
I/O Ports Analog I/F
Lowest power mode with peripheral operational:
USART
Low Energy
UART
I2C
External
Interrupts
General Purpose
I/O
Pin Reset
Pin Wakeup
ADC
IDAC
Analog
Comparator
Radio Transceiver
DEMOD
AGC
IFADC
CRC
BUFC
RFSENSE
MOD
FRC
RAC
EM3—StopEM2—Deep SleepEM1—Sleep EM4—Hibernate EM4—ShutoffEM0—Active
PA
I
Q
RF Frontend
LNA
Frequency
Synthesizer
PGA
BALUN
Core / Memory
ARM Cortex M4 processor
with DSP extensions and FPU
Energy Management
Brown-Out
Detector
DC-DC
Converter
Voltage
Regulator Voltage Monitor
Power-On Reset
Other
CRYPTO
CRC
Clock Management
High Frequency
Crystal Oscillator
Low Frequency
Crystal Oscillator
Low Frequency
RC Oscillator
High Frequency
RC Oscillator
Ultra Low
Frequency
RC Oscillator
Auxiliary
High Frequency
RC Oscillator
Flash Program
Memory RAM Memory Debug Interface DMA Controller
Memory
Protection Unit
Antenna
Crystals
32.768kHz
38.4MHz
Chip antenna
Matching
silabs.com | Smart. Connected. Energy-friendly. Rev. 0.82
1. Feature List
The BGM121/BGM123 highlighted features are listed below.
•Low Power Wireless System-on-Chip.
•High Performance 32-bit 38.4 MHz ARM Cortex®-M4 with
DSP instruction and floating-point unit for efficient signal
processing
• 256 kB flash program memory
• 32 kB RAM data memory
• 2.4 GHz radio operation
• TX power up to 8 dBm
•Low Energy Consumption
• 9.0 mA RX current at 2.4 GHz
• 8.2 mA TX current @ 0 dBm output power at 2.4 GHz
• 63 μA/MHz in Active Mode (EM0)
• 2.5 μA EM2 DeepSleep current (full RAM retention and
RTCC running from LFXO)
• 2.1 μA EM3 Stop current (State/RAM retention)
• Wake on Radio with signal strength detection, preamble
pattern detection, frame detection and timeout
•High Receiver Performance
• -90 dBm sensitivity @ 1 Mbit/s GFSK (2.4 GHz)
•Supported Protocols
•Bluetooth®
•Support for Internet Security
• General Purpose CRC
• Random Number Generator
• Hardware Cryptographic Acceleration for AES 128/256,
SHA-1, SHA-2 (SHA-224 and SHA-256) and ECC
•Wide Selection of MCU peripherals
• 12-bit 1 Msps SAR Analog to Digital Converter (ADC)
• 2 × Analog Comparator (ACMP)
• Digital to Analog Current Converter (IDAC)
• 32 pins connected to analog channels (APORT) shared be-
tween Analog Comparators, ADC, and IDAC
• 30 General Purpose I/O pins with output state retention and
asynchronous interrupts
• 8 Channel DMA Controller
• 12 Channel Peripheral Reflex System (PRS)
• 2×16-bit Timer/Counter
• 3 + 4 Compare/Capture/PWM channels
• 32-bit Real Time Counter and Calendar
• 16-bit Low Energy Timer for waveform generation
• 32-bit Ultra Low Energy Timer/Counter for periodic wake-up
from any Energy Mode
• 16-bit Pulse Counter with asynchronous operation
• Watchdog Timer with dedicated RC oscillator @ 50nA
• 2×Universal Synchronous/Asynchronous Receiver/Trans-
mitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)
•Low Energy UART (LEUART™)
•I2C interface with SMBus support and address recognition
in EM3 Stop
•Wide Operating Range
• 1.85 V to 3.8 V single power supply
• 2.4 V to 3.8 V when using DC-DC
• Integrated DC-DC
• -40 °C to +85 °C
•Dimensions
• 6.5 x 6.5 x 1.4 mm
BGM121/BGM123 Blue Gecko Bluetooth ® SiP Module Data Short
Feature List
silabs.com | Smart. Connected. Energy-friendly. Rev. 0.82 | 1
2. Ordering Information
Ordering Code Protocol Stack Frequency
Band
Max TX
Power
(dBm)
Antenna Flash
(KB)
RAM
(KB)
GPIO Package
BGM123A256V1R1Bluetooth Smart 2.4 GHz +3 Built-in 256 32 30 1000 pcs
reel
BGM123A256V11Bluetooth Smart 2.4 GHz +3 Built-in 256 32 30 260 pcs
tray
BGM123N256V1R1Bluetooth Smart 2.4 GHz +3 RF pin 256 32 30 1000 pcs
reel
BGM123N256V11Bluetooth Smart 2.4 GHz +3 RF pin 256 32 30 260 pcs
tray
BGM121A256V1R1Bluetooth Smart 2.4 GHz +8 Built-in 256 32 30 1000 pcs
reel
BGM121A256V11Bluetooth Smart 2.4 GHz +8 Built-in 256 32 30 260 pcs
tray
BGM121N256V1R1Bluetooth Smart 2.4 GHz +8 RF pin 256 32 30 1000 pcs
reel
BGM121N256V11Bluetooth Smart 2.4 GHz +8 RF pin 256 32 30 260 pcs
tray
BGM123A256V2R Bluetooth Smart 2.4 GHz +3 Built-in 256 32 30 1000 pcs
reel
BGM123A256V2 Bluetooth Smart 2.4 GHz +3 Built-in 256 32 30 260 pcs
tray
BGM123N256V2R Bluetooth Smart 2.4 GHz +3 RF pin 256 32 30 1000 pcs
reel
BGM123N256V2 Bluetooth Smart 2.4 GHz +3 RF pin 256 32 30 260 pcs
tray
BGM121A256V2R Bluetooth Smart 2.4 GHz +8 Built-in 256 32 30 1000 pcs
reel
BGM121A256V2 Bluetooth Smart 2.4 GHz +8 Built-in 256 32 30 260 pcs
tray
BGM121N256V2R Bluetooth Smart 2.4 GHz +8 RF pin 256 32 30 1000 pcs
reel
BGM121N256V2 Bluetooth Smart 2.4 GHz +8 RF pin 256 32 30 260 pcs
tray
SLWSTK6101C2
SLWRB4302A3
Note:
1. V1 is the Initial production / engineering sample version and is not certified. V2 is the Full production version and will be certified.
2. Blue Gecko Bluetooth Module Wireless Starter Kit (WSTK) with BGM121A256 radio board (SLWRB4302A) and BGM111A256
radio board (SLWRB4300A), expansion board and accessories.
3. BGM121A256 Radio Board
BGM121/BGM123 Blue Gecko Bluetooth ® SiP Module Data Short
Ordering Information
silabs.com | Smart. Connected. Energy-friendly. Rev. 0.82 | 2
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Disclaimer
Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or
intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical"
parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes
without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included
information. Silicon Labs shall have no liability for the consequences of use of the information supplied herein. This document does not imply or express copyright licenses granted
hereunder to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any Life Support System without the specific written consent of
Silicon Labs. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal
injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass
destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.
Trademark Information
Silicon Laboratories Inc.® , Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clockbuilder®, CMEMS®, DSPLL®, EFM®, EFM32®,
EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®,
Gecko®, ISOmodem®, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress® and others are trademarks or registered trademarks of Silicon
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names mentioned herein are trademarks of their respective holders.
