You can start developing Matter (formerly project CHIP) solutions using the EFR32MG21 Series 2 SoCs
EFR32MG21 Common Specs
Zigbee and Thread Radio
- 2.4 GHz IEEE 802.15.4
- 250 kbps O-QPSK DSSS
- Excellent Receive Sensitivity:
- -104.5 dBm @250 kbps O-QPSK DSSS
- Programmable Output Power: +20 dBm
- Active Mode RX: 9.4 mA
- Active Mode TX: 9.3 mA @ 0 dBm
- Active Mode TX: 33.8 mA @ 10 dBm
Bluetooth® Low Energy Radio
- Compatible with Bluetooth 5, Bluetooth 5.1 and Bluetooth mesh specification
- Excellent Receive Sensitivity:
- -104.9 dBm @ 125 kbps GFSK
- -97.5 dBm @1 Mbps GFSK
- -94.4 dBm @2 Mbps GFSK
- Programmable Output Power: Up to +20 dBm
- Active Mode RX: 8.8 mA
- Active Mode TX: 9.3 mA @ 0 dBm
- Active Mode TX: 33.8 mA @10 dBm
Rich Analog and Digital Peripherals
- 12-bit 1 Msps SAR Analog to Digital Converter (ADC)
- Analog Comparators (ACMP)
- 8 Channel DMA Controller
- Peripheral Reflex System (PRS)
- PTA (Packet Traffic Arbitration) for Wi-Fi Coexistence
- 16-bit Timer/Counters
- 3 Compare/Capture/PWM channels per Timer
- 32-bit Timer/Counter
- 3 Compare/Capture/PWM channels per Timer
- 32-bit Real Time Counter
- 24-bit Low Energy Timer for waveform generation
- Watchdog Timers
- Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard(ISO 7816)/IrDA/I2S)
- 2C interface with SMBus support
- Up to 20 General Purpose I/O pins
- Output state retention and asynchronous interrupts
Powerful MCU & Memory Options
- ARM® Cortex®-M33
- DSP and Floating Point Unit
- Up to 80 MHz Clock Speed
- Low Active Mode Current: 50.9 µA/MHz
- Up to 1024 kB of Programmable Flash
- Up to 96 kB RAM
Package Options
- QFN32 (4 mm x 4 mm)
Securing Your IoT Product
IoT security is key to protecting company brands, end user privacy and commercial viability of products. Vulnerabilities can be exploited through both remote Internet attacks and physical hands-on-attacks.
Developers using the Silicon Labs EFR32MG21 family have access to the highest level of IoT security provided by Secure Vault.
MG21 Security Features
Whitepaper: Preparing for Next-Gen Cyber Attacks on IoT
Find the Right EFR32MG21 Device
Select Columns
| Part Number | MCU | Core Frequency (MHz) | Flash | RAM | Secure Vault | Cryptography | Output Power Range (dBm) | Receive Sensitivity | GPIO | RX Current (mA) | UART | USART | I²C | SPI | I²S | ADC | Comparators | Timers (16-bit) | Temperature Range ºC | Package Type | Package Size (mm) | Wireless Standards | Multiprotocol |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ARM Cortex-M33 | 80 | 1024 | 96 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 512 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 768 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 1024 | 96 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 512 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 768 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 1024 | 96 | — | AES-256 ECC SHA-1 SHA-2 | -20 10 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 512 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 10 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 768 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 10 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 1024 | 96 | — | AES-256 ECC SHA-1 SHA-2 | -20 20 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 512 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 20 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic | |
| ARM Cortex-M33 | 80 | 768 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 20 | -104 (250 kbps O-QPSK DSSS) | 20 | 9.4 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | Thread Zigbee Bluetooth | Switched Programmable Dynamic |
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EFR32xG21 Wireless Gecko Starter Kit
The EFR32xG21 Wireless Gecko Starter Kit (SLWSTK6006A) includes everything needed to enable developers to create a mesh network and evaluate the EFR32xG21A with Secure Element and the EFR32xG21B with Secure Vault Series 2 Wireless Gecko SoCs. This kit provides the common baseboard and comes with 6 xG21A modules (SLWRB418xA). If you want to evaluate the EFR32xG21B you must buy the xG21B modules (SLWRB4181C +10 dBm) separately.
EFR32xG21 Wireless Gecko Starter Kit
The EFR32xG21 Wireless Gecko Starter Kit (SLWSTK6006A) includes everything needed to enable developers to create a mesh network and evaluate the EFR32xG21A with Secure Element and the EFR32xG21B with Secure Vault Series 2 Wireless Gecko SoCs. This kit provides the common baseboard and comes with 6 xG21A modules (SLWRB418xA). If you want to evaluate the EFR32xG21B you must buy the xG21B modules (SLWRB4181C +10 dBm) separately.