Data Sheet

Table of Contents
1. Features .................................2
2. Ordering Information ............................3
3. System Overview ..............................6
3.1 Block Diagram ..............................6
3.2 EFR32MG21 SoC .............................6
3.3 Antenna ................................6
3.4 Power Supply ..............................6
4. Electrical Specifications ...........................7
4.1 Absolute Maximum Ratings..........................7
4.2 General Operating Conditions .........................8
4.3 MCU Current Consumption at 3.0V .......................9
4.4 Radio Current Consumption at 3.0V .......................10
4.5 RF Transmitter General Characteristics .....................11
4.6 RF Transmitter Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band........12
4.7 RF Receiver General Characteristics ......................12
4.8 RF Receiver Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band ........13
4.9 RF Receiver Characteristics for Bluetooth Low Energy at 1 Mbps .............14
4.10 RF Receiver Characteristics for Bluetooth Low Energy at 2 Mbps ............15
4.11 RF Receiver Characteristics for Bluetooth Low Energy at 500 kbps ............16
4.12 RF Receiver Characteristics for Bluetooth Low Energy at 125 kbps ............17
4.13 High-Frequency Crystal ..........................18
4.14 GPIO Pins ...............................19
4.15 Microcontroller Peripherals .........................20
4.16 Typical Performance Curves .........................20
4.16.1 Antenna Radiation and Efficiency ......................21
5. Reference Diagrams............................ 22
5.1 Network Co-Processor (NCP) Application with UART Host ...............22
5.2 SoC Application .............................23
6. Pin Definitions ..............................24
6.1 Module Pinout ..............................24
6.2 Alternate Pin Functions ...........................25
6.3 Analog Peripheral Connectivity ........................25
6.4 Digital Peripheral Connectivity .........................26
7. Design Guidelines ............................29
7.1 Layout and Placement ...........................29
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