EFR32BG21 Blue Gecko Wireless SoC

Family Data Sheet

The Blue Gecko family of SoCs is part of the Wireless Gecko port-

folio. Blue Gecko SoCs are ideal for enabling energy-friendly Blue-

tooth 5 networking for IoT devices.

The single-die solution combines an 80 MHz ARM Cortex-M33 with a high performance

2.4 GHz radio to provide an industry-leading, energy efficient wireless SoC for IoT con-

nected applications.

Blue Gecko applications include:

KEY FEATURES

• 32-bit ARM® Cortex®-M33 core with 80

MHz maximum operating frequency

• Up to 1024 kB of flash and 96 kB of RAM

• 12-channel Peripheral Reflex System

enabling autonomous interaction of MCU

peripherals

• Integrated PA with up to 20 dBm (2.4

GHz) TX power

• Robust peripheral set and up to 20 GPIO

in a 4x4 QFN package

• Lighting

• Connected Home

• Gateways and Digital Assistants

• Building Automation and Security

Security

Secure Debug

Authentication

Timers and Triggers

32-bit bus

Peripheral Reflex System

Serial

Interfaces

I/O Ports Analog I/F

Lowest power mode with peripheral operational:

USART

External

Interrupts

General

Purpose I/O

Pin Reset

Pin Wakeup

IADC

Analog

Comparator

EM4—Shutoff

Energy

Management

Brown-Out

Detector

Voltage

Regulator

Power-On Reset

Clock Management

HF Crystal

Oscillator

LF Crystal

Oscillator

RC Oscillator

EM23 HF RC

Oscillator

Crypto Acceleration

Secure Element

Ultra LF RC

Oscillator

Core / Memory

ARM Cortex

M33 processor

with DSP extensions,

FPU and Trust Zone

ETM Secure Debug RAM Memory

LDMA

Controller

Flash Program

Memory

Real Time

Capture Counter

Timer/Counter

Low Energy Timer

Watchdog Timer

Protocol Timer

EM3—StopEM2—Deep SleepEM1—SleepEM0—Active

True Random

Number Generator

Fast Startup

RC Oscillator

Back-Up Real

Time Counter

Radio Transceiver

DEMOD

AGC

IFADC

CRC

BUFC

MOD

FRC

RAC

Frequency

Synth

PGA

RF Frontend

LNA

EUI

Secure Boot with

Root of Trust and

Secure Loader

DPA

Countermeasures

silabs.com | Building a more connected world. Rev. 1.1

1. Feature List

The EFR32BG21 highlighted features are listed below.

• Low Power Wireless System-on-Chip

•

High Performance 32-bit 80 MHz ARM Cortex

-M33 with

DSP instruction and floating-point unit for efficient signal

processing

• Up to 1024 kB flash program memory

• Up to 96 kB RAM data memory

• 2.4 GHz radio operation

• TX power up to 20 dBm

• Low Energy Consumption

• 8.8 mA RX current at 2.4 GHz (1 Mbps GFSK)

• 9.3 mA TX current @ 0 dBm output power at 2.4 GHz

• 33.8 mA TX current @ 10 dBm output power at 2.4 GHz

• 50.9 μA/MHz in Active Mode (EM0)

• 5.0 μA EM2 DeepSleep current

(96 kB RAM retention and RTC running from LFXO)

• 4.5 μA EM2 DeepSleep current

(16 kB RAM retention and RTC running from LFRCO)

• High Receiver Performance

• -97.5 dBm sensitivity @ 1 Mbit/s GFSK

• -94.4 dBm sensitivity @ 2 Mbit/s GFSK

• -104.9 dBm sensitivity @ 125 kbps GFSK

• Supported Modulation Format

• GFSK

• Protocol Support

• Bluetooth Low Energy (Bluetooth 5)

• Wide selection of MCU peripherals

• 12-bit 1 Msps SAR Analog to Digital Converter (ADC)

• 2 × Analog Comparator (ACMP)

• Up to 20 General Purpose I/O pins with output state reten-

tion and asynchronous interrupts

• 8 Channel DMA Controller

• 12 Channel Peripheral Reflex System (PRS)

• 2 × 16-bit Timer/Counter

• 3 Compare/Capture/PWM channels

• 1 × 32-bit Timer/Counter

• 3 Compare/Capture/PWM channels

• 32-bit Real Time Counter

• 24-bit Low Energy Timer for waveform generation

• 2 × Watchdog Timer

• 3 × Universal Synchronous/Asynchronous Receiver/Trans-

mitter (UART/SPI/SmartCard(ISO 7816)/IrDA/I

•

2 × I

C interface with SMBus support

• Wide Operating Range

• 1.71 to 3.8 V single power supply

• -40 to 125 °C ambient

• Security

• Secure Boot with Root of Trust and Secure Loader (RTSL)

• Hardware Cryptographic Acceleration with DPA counter-

measures for AES128/256, SHA-1, SHA-2 (up to 256-bit),

ECC (up to 256-bit), ECDSA, ECDH and J-Pake

• True Random Number Generator (TRNG) compliant with

NIST SP800-90 and AIS-31

• ARM® TrustZone®

• Secure Debug with lock/unlock

• QFN32 4x4 mm Package

• 0.4 mm pitch

EFR32BG21 Blue Gecko Wireless SoC Family Data Sheet

Feature List

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