Datasheet EFR32BG21 (Silicon Labs) - 4

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Table of Contents 1. Feature List . 2 2. Ordering Information . 3 3. System Overview . 6
3.1 Introduction . 6 3.2 Radio . 6 3.2.1 Antenna Interface . 6 3.2.2 Fractional-N Frequency Synthesizer . 7 3.2.3 Receiver Architecture . 7 3.2.4 Transmitter Architecture . 7 3.2.5 Packet and State Trace . 7 3.2.6 Data Buffering. 7 3.2.7 Radio Controller (RAC). 7 3.3 General Purpose Input/Output (GPIO) . 8 3.4 Clocking . 8 3.4.1 Clock Management Unit (CMU) . 8 3.4.2 Internal and External Oscillators. 8 3.5 Counters/Timers and PWM . 8 3.5.1 Timer/Counter (TIMER) . 8 3.5.2 Low Energy Timer (LETIMER) . 8 3.5.3 Real Time Clock with Capture (RTCC) . 9 3.5.4 Back-Up Real Time Counter . 9 3.5.5 Watchdog Timer (WDOG) . 9 3.6 Communications and Other Digital Peripherals . 9 3.6.1 Universal Synchronous/Asynchronous Receiver/Transmitter (USART) . 9 3.6.2 Inter-Integrated Circuit Interface (I2C) . 9 3.6.3 Peripheral Reflex System (PRS) . 9 3.7 Security Features . .10 3.7.1 Standard Security . .10 3.7.2 True Random Number Generator . .10 3.8 Analog. .10 3.8.1 Analog Comparator (ACMP) . .10 3.8.2 Analog to Digital Converter (ADC) . .10 3.9 Reset Management Unit (RMU) . .10 3.10 Core and Memory . .11 3.10.1 Processor Core . .11 3.10.2 Memory System Controller (MSC) . .11 3.10.3 Linked Direct Memory Access Controller (LDMA) . .11 3.11 Memory Map . .12 3.12 Configuration Summary . .13
4. Electrical Specifications . 14
4.1 Electrical Characteristics . .14
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| Building a more connected world. Rev. 1.0 | 4 Document Outline 1. Feature List 2. Ordering Information 3. System Overview 3.1 Introduction 3.2 Radio 3.2.1 Antenna Interface 3.2.2 Fractional-N Frequency Synthesizer 3.2.3 Receiver Architecture 3.2.4 Transmitter Architecture 3.2.5 Packet and State Trace 3.2.6 Data Buffering 3.2.7 Radio Controller (RAC) 3.3 General Purpose Input/Output (GPIO) 3.4 Clocking 3.4.1 Clock Management Unit (CMU) 3.4.2 Internal and External Oscillators 3.5 Counters/Timers and PWM 3.5.1 Timer/Counter (TIMER) 3.5.2 Low Energy Timer (LETIMER) 3.5.3 Real Time Clock with Capture (RTCC) 3.5.4 Back-Up Real Time Counter 3.5.5 Watchdog Timer (WDOG) 3.6 Communications and Other Digital Peripherals 3.6.1 Universal Synchronous/Asynchronous Receiver/Transmitter (USART) 3.6.2 Inter-Integrated Circuit Interface (I2C) 3.6.3 Peripheral Reflex System (PRS) 3.7 Security Features 3.7.1 Standard Security 3.7.2 True Random Number Generator 3.8 Analog 3.8.1 Analog Comparator (ACMP) 3.8.2 Analog to Digital Converter (ADC) 3.9 Reset Management Unit (RMU) 3.10 Core and Memory 3.10.1 Processor Core 3.10.2 Memory System Controller (MSC) 3.10.3 Linked Direct Memory Access Controller (LDMA) 3.11 Memory Map 3.12 Configuration Summary 4. Electrical Specifications 4.1 Electrical Characteristics 4.1.1 Absolute Maximum Ratings 4.1.2 General Operating Conditions 4.1.3 Thermal Characteristics 4.1.4 Current Consumption 4.1.4.1 MCU current consumption at 1.8V 4.1.4.2 MCU current consumption at 3.0V 4.1.4.3 Radio current consumption at 1.8V 4.1.4.4 Radio current consumption at 3.0V 4.1.5 2.4 GHz RF Transceiver Characteristics 4.1.5.1 RF Transmitter Characteristics 4.1.5.2 RF Receiver Characteristics 4.1.6 Flash Characteristics 4.1.7 Wake Up, Entry, and Exit times 4.1.8 Oscillators 4.1.8.1 High Frequency Crystal Oscillator 4.1.8.2 Low Frequency Crystal Oscillator 4.1.8.3 High Frequency RC Oscillator (HFRCO) 4.1.8.4 Fast Start_Up RC Oscillator (FSRCO) 4.1.8.5 Low Frequency RC Oscillator 4.1.8.6 Ultra Low Frequency RC Oscillator 4.1.9 GPIO Pins (3V GPIO pins) 4.1.10 Analog to Digital Converter (ADC) 4.1.11 Analog Comparator (ACMP) 4.1.12 Temperature Sense 4.1.13 Brown Out Detectors 4.1.13.1 DVDD BOD 4.1.13.2 LE DVDD BOD 4.1.13.3 AVDD and VIO BODs 4.1.14 SPI Electrical Specifications 4.1.14.1 SPI Master Timing 4.1.14.2 SPI Slave Timing 4.1.15 I2C Electrical Specifications 4.1.15.1 I2C Standard-mode (Sm) 4.1.15.2 I2C Fast-mode (Fm) 4.1.15.3 I2C Fast-mode Plus (Fm+) 4.2 Typical Performance Curves 4.2.1 Supply Current 4.2.2 2.4 GHz Radio 5. Typical Connection Diagrams 5.1 Power 5.2 RF Matching Networks 5.2.1 2.4 GHz 0 dBm Matching Network 5.2.2 2.4 GHz 10 dBm Matching Network 5.2.3 2.4 GHz 20 dBm Matching Network 5.3 Other Connections 6. Pin Definitions 6.1 QFN32 2.4GHz Device Pinout 6.2 Alternate Function Table 6.3 Analog Peripheral Connectivity 6.4 Digital Peripheral Connectivity 7. QFN32 Package Specifications 7.1 QFN32 Package Dimensions 7.2 QFN32 PCB Land Pattern 7.3 QFN32 Package Marking 8. Revision History