EFR32MG21A020F768IM32 Zigbee and Thread EFR32MG21 SoCs (Series 2)

EFR32MG21A020F768IM32 EFR32MG21 Series 2 wireless SoCs include a 80 MHz ARM Cortex-M33 core, providing plenty of processing capability while a dedicated security core provides faster encryption, secure boot loading and debug access control. The device includes 768 Flash, 64 RAM and is available in a QFN32 package. With up to + 20 dBm maximum power output and excellent receive sensitivity of -104 (250 kbps O-QPSK DSSS) dBm, the EFR32MG21A020F768IM32 provides a robust RF link for reliable communications for Zigbee, Thread and multiprotocol applications and enables greater range and reliable RF communications. EFR32MG21A020F768IM32 uses the same tools as EFR32MG Series 1, providing easy migration and fast time-to-market with development kits, SDKs, mobile apps and our patented network analyzer.

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Key Features

The EFR32MG21 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)
• 9.4 mA RX current at 2.4 GHz (250 kbps O-QPSK DSSS)
• 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
• -104.5 dBm sensitivity @ 250 kbps O-QPSK DSSS
• -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 Formats
• GFSK
• OQPSK
• Protocol Support
• Bluetooth Low Energy (Bluetooth 5)
• Zigbee
• Thread
• 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 retention
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/Transmitter
(UART/SPI/SmartCard(ISO 7816)/IrDA/I2S)
• 2 × I2C 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 countermeasures
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 4×4 mm Package
• 0.4 mm pitch

MCU Core	ARM Cortex-M33
RAM (kB)	64
GPIO	20
Package Type	QFN32
Bluetooth Low Energy Capable	Yes
Core Frequency (MHz)	80
Secure Vault	—
Temperature (Min)	-40
Zigbee Capable	Yes
2.4 GHz Capable	Yes
Flash (kB)	768
Max Output Power	20
Temperature (Max)	125
Thread Capable	Yes
Sub-GHz Capable	No

EFR32MG21A020F768IM32 Zigbee and Thread EFR32MG21 SoCs (Series 2)

Key Features

Applications

IC Specification

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