Silicon Libs Efr32bg22 Wireless Gecko Soc Family Data Sheet

EFR32BG22 Wireless Gecko SoC Family Data Sheet

The EFR32BG22 Wireless Gecko family of SoCs is part of the Wireless Gecko portfolio. EFR32BG22 Wireless Gecko SoCs are ideal for enabling energy-friendly Bluetooth 5.2 networking for IoT devices.
The single-die solution combines a 76.8 MHz Cortex-M33 with a high performance 2.4 GHz radio to provide an industry-leading, energy efficient wireless, SoC for IoT connected applications.

Wireless Gecko applications include

• Asset Tags and Beacons
• Consumer Electronics Remote Controls
• Portable Medical
• Bluetooth Mesh Low Power Nodes
• Sports, Fitness, and Wellness devices
• Connected Home
• Building Automation and Security

KEY FEATURES

• 32-bit ARM® Cortex®-M33 core with 76.8 MHz maximum operating frequency
• Up to 512 kB of flash and 32 kB of RAM
• Energy-efficient radio core with low active and sleep currents
• Bluetooth 5.2 Direction Finding
• Integrated PA with up to 6 dBm (2.4 GHz) TX power
• Secure Boot with Root of Trust and Secure Loader (RTSL)

Feature List

The EFR32BG22 highlighted features are listed below.

Low Power Wireless System-on-Chip

• High Performance 32-bit 76.8 MHz MHz ARM Cortex®-M33 with DSP instruction and floating-point unit for efficient sig- nal processing
• Up to 512 kB flash program memory
• Up to 32 kB RAM data memory
• 2.4 GHz radio operation

Radio Performance

• -106.7 dBm sensitivity @ 125 kbps GFSK
• -98.9 dBm sensitivity @ 1 Mbit/s GFSK
• -96.2 dBm sensitivity @ 2 Mbit/s GFSK
• TX power up to 6 dBm
• 2.5 mA radio receive current
• 3.4 mA radio transmit current @ 0 dBm output power
• 7.5 mA radio transmit current @ 6 dBm output power

Low System Energy Consumption

• 3.6 mA RX current (1 Mbps GFSK)
• 4.1 mA TX current @ 0 dBm output power
• 8.2 mA TX current @ 6 dBm output power
• 27 μA/MHz in Active Mode (EM0) at 76.8 MHz
• 1.40 μA EM2 DeepSleep current (32 kB RAM retention and RTC running from LFXO)
• 1.75 μA EM2 DeepSleep current (32 kB RAM retention and RTC running from Precision LFRCO)
• 0.17 μA EM4 current

Supported Modulation Format

• 2 (G)FSK with fully configurable shaping
• OQPSK DSSS
• (G)MSK

Protocol Support

• Bluetooth Low Energy (Bluetooth 5.2)
• Direction finding using Angle-of-Arrival (AoA) and Angle-of- Departure (AoD)
• Proprietary

Wide selection of MCU peripherals

• Analog to Digital Converter (ADC)
• 12-bit @ 1 Msps
• 16-bit @ 76.9 ksps
• Up to 26 General Purpose I/O pins with output state reten- tion and asynchronous interrupts
• 8 Channel DMA Controller
• 12 Channel Peripheral Reflex System (PRS)
• 4 × 16-bit Timer/Counter with 3 Compare/Capture/PWM channels
• 1 × 32-bit Timer/Counter with 3 Compare/Capture/PWM channels
• 32-bit Real Time Counter
• 24-bit Low Energy Timer for waveform generation
• 1 × Watchdog Timer
• 2 × Universal Synchronous/Asynchronous Receiver/Trans- mitter (UART/SPI/SmartCard (ISO 7816)/IrDA/I2S)
• 1 × Enhanced Universal Asynchronous Receiver/Transmit- ter (EUART)
• 2 × I2C interface with SMBus support
• Digital microphone interface (PDM)
• Precision Low-Frequency RC Oscillator to replace 32 kHz sleep crystal
• RFSENSE with selective OOK mode
• Die temperature sensor with +/-1.5 degree C accuracy after single-point calibration

Wide Operating Range

• 1.71 V to 3.8 V single power supply
• -40 °C to 125 °C

Security Features

• Secure Boot with Root of Trust and Secure Loader (RTSL)
• Hardware Cryptographic Acceleration for AES128/256, SHA-1, SHA-2 (up to 256-bit), ECC (up to 256-bit), ECDSA, and ECDH
• True Random Number Generator (TRNG) compliant with NIST SP800-90 and AIS-31
• ARM® TrustZone®
• Secure Debug with lock/unlock

Packages

• QFN40 5 mm × 5 mm × 0.85 mm
• QFN32 4 mm × 4 mm × 0.85 mm
• TQFN32 4 mm × 4 mm × 0.30 mm

Ordering Information

LE Long Range (125 kbps and 500 kbps) PHYs are only supported on part numbers which include AoA/AoD direction-finding capability.

System Overview

Introduction

The EFR32 product family combines an energy-friendly MCU with a high performance radio transceiver. The devices are well suited for secure connected IoT multi-protocol devices requiring high performance and low energy consumption. This section gives a short intro- duction to the full radio and MCU system. The detailed functional description can be found in the EFR32xG22 Reference Manual.

A block diagram of the EFR32BG22 family is shown in Figure 3.1 Detailed EFR32BG22 Block Diagram on page 7. The diagram   shows a superset of features available on the family, which vary by OPN. For more information about specific device features, consult Ordering Information.

Radio

The EFR32BG22 Wireless Gecko features a highly configurable radio transceiver supporting the Bluetooth Low Energy wireless proto- col.

Antenna Interface

The 2.4 GHz antenna interface consists of a single-ended pin (RF2G4_IO). The external components for the antenna interface in typi- cal applications are shown in the RF Matching Networks section.

Fractional-N Frequency Synthesizer

The EFR32BG22 contains a high performance, low phase noise, fully integrated fractional-N frequency synthesizer. The synthesizer is used in receive mode to generate the LO frequency for the down-conversion mixer. It is also used in transmit mode to directly generate the modulated RF carrier.

The fractional-N architecture provides excellent phase noise performance, frequency resolution better than 100 Hz, and low energy consumption. The synthesizer’s fast frequency settling allows for very short receiver and transmitter wake up times to reduce system energy consumption.

Receiver Architecture

The EFR32BG22 uses a low-IF receiver architecture, consisting of a Low-Noise Amplifier (LNA) followed by an I/Q down-conversion mixer. The I/Q signals are further filtered and amplified before being sampled by the IF analog-to-digital converter (IFADC).

The IF frequency is configurable from 150 kHz to 1371 kHz. The IF can further be configured for high-side or low-side injection, providing flexibility with respect to known interferers at the image frequency.

The Automatic Gain Control (AGC) module adjusts the receiver gain to optimize performance and avoid saturation for excellent selectivity and blocking performance. The 2.4 GHz radio is calibrated at production to improve image rejection performance.

Demodulation is performed in the digital domain. The demodulator performs configurable decimation and channel filtering to allow receive bandwidths ranging from 0.1 to 2530 kHz. High carrier frequency and baud rate offsets are tolerated by active estimation and compensation. Advanced features supporting high quality communication under adverse conditions include forward error correction by block and convolutional coding as well as Direct Sequence Spread Spectrum (DSSS).

A Received Signal Strength Indicator (RSSI) is available for signal quality metrics, for level-based proximity detection, and for RF channel access by Collision Avoidance (CA) or Listen Before Talk (LBT) algorithms. An RSSI capture value is associated with each received frame and the dynamic RSSI measurement can be monitored throughout reception.

Transmitter Architecture

The EFR32BG22 uses a direct-conversion transmitter architecture. For constant envelope modulation formats, the modulator controls phase and frequency modulation in the frequency synthesizer. Transmit symbols or chips are optionally shaped by a digital shaping filter. The shaping filter is fully configurable, including the BT product, and can be used to implement Gaussian or Raised Cosine shap- ing.

Carrier Sense Multiple Access – Collision Avoidance (CSMA-CA) or Listen Before Talk (LBT) algorithms can be automatically timed by the EFR32BG22. These algorithms are typically defined by regulatory standards to improve inter-operability in a given bandwidth be- tween devices that otherwise lack synchronized RF channel access.

Packet and State Trace

The EFR32BG22 Frame Controller has a packet and state trace unit that provides valuable information during the development phase. It features:

• Non-intrusive trace of transmit data, receive data and state information
• Data observability on a single-pin UART data output, or on a two-pin SPI data output
• Configurable data output bitrate /baudrate
• Multiplexed transmitted data, received data and state / meta information in a single serial data stream

Data Buffering

The EFR32BG22 features an advanced Radio Buffer Controller (BUFC) capable of handling up to 4 buffers of adjustable size from 64 bytes to 4096 bytes. Each buffer can be used for RX, TX or both. The buffer data is located in RAM, enabling zero-copy operations.

Radio Controller (RAC)

The Radio Controller controls the top level state of the radio subsystem in the EFR32BG22. It performs the following tasks:

• Precisely-timed control of enabling and disabling of the receiver and transmitter circuitry
• Run-time calibration of receiver, transmitter and frequency synthesizer
• Detailed frame transmission timing, including optional LBT or CSMA-CA

RFSENSE Interface

The RFSENSE block allows the device to remain in EM2, EM3 or EM4 and wake when RF energy above a specified threshold is detec- ted. When operated in selective mode, the RFSENSE block performs OOK preamble and sync word detection, preventing false wake- up events.

General Purpose Input/Output (GPIO)

EFR32BG22 has up to 26 General Purpose Input/Output pins. Each GPIO pin can be individually configured as either an output or input. More advanced configurations including open-drain, open-source, and glitch-filtering can be configured for each individual GPIO pin. The GPIO pins can be overridden by peripheral connections, like SPI communication. Each peripheral connection can be routed to several GPIO pins on the device. The input value of a GPIO pin can be routed through the Peripheral Reflex System to other peripher- als. The GPIO subsystem supports asynchronous external pin interrupts.

All of the pins on ports A and port B are EM2 capable. These pins may be used by Low-Energy peripherals in EM2/3 and may also be used as EM2/3 pin wake-ups. Pins on ports C and D are latched/retained in their current state when entering EM2 until EM2 exit upon which internal peripherals could once again drive those pads.

A few GPIOs also have EM4 wake functionality. These pins are listed in the Alternate Function Table.

Clocking

Clock Management Unit (CMU)

The Clock Management Unit controls oscillators and clocks in the EFR32BG22. Individual enabling and disabling of clocks to all periph- eral modules is performed by the CMU. The CMU also controls enabling and configuration of the oscillators. A high degree of flexibility allows software to optimize energy consumption in any specific application by minimizing power dissipation in unused peripherals and oscillators.

Internal and External Oscillators

The EFR32BG22 supports two crystal oscillators and fully integrates four RC oscillators, listed below.

• A high frequency crystal oscillator (HFXO) with integrated load capacitors, tunable in small steps, provides a precise timing refer- ence for the MCU. The HFXO provides excellent RF clocking performance using a 38.4 MHz crystal. The HFXO can also support an external clock source such as a TCXO for applications that require an extremely accurate clock frequency over temperature.
• A 32.768 kHz crystal oscillator (LFXO) provides an accurate timing reference for low energy modes.
• An integrated high frequency RC oscillator (HFRCO) is available for the MCU system, when crystal accuracy is not required. The HFRCO employs fast start-up at minimal energy consumption combined with a wide frequency range, from 1 MHz to 76.8 MHz.
• An integrated fast start-up RC oscillator (FSRCO) that runs at a fixed 20 MHz
• An integrated low frequency 32.768 kHz RC oscillator (LFRCO) for low power operation without an external crystal. Precision mode enables periodic recalibration against the 38.4 MHz HFXO crystal to improve accuracy to +/- 500 ppm, suitable for BLE sleep inter- val timing.
• An integrated ultra-low frequency 1 kHz RC oscillator (ULFRCO) is available to provide a timing reference at the lowest energy con- sumption in low energy modes.

Counters/Timers and PWM

Timer/Counter (TIMER)

TIMER peripherals keep track of timing, count events, generate PWM outputs and trigger timed actions in other peripherals through the Peripheral Reflex System (PRS). The core of each TIMER is a 16-bit or 32-bit counter with up to 3 compare/capture channels. Each channel is configurable in one of three modes. In capture mode, the counter state is stored in a buffer at a selected input event. In compare mode, the channel output reflects the comparison of the counter to a programmed threshold value. In PWM mode, the TIMER supports generation of pulse-width modulation (PWM) outputs of arbitrary waveforms defined by the sequence of values written to the compare registers. In addition some timers offer dead-time insertion. See 3.13 Configuration Summary for information on the feature set of each timer.

Low Energy Timer (LETIMER)

The unique LETIMER is a 24-bit timer that is available in energy mode EM0 Active, EM1 Sleep, EM2 Deep Sleep, and EM3 Stop. This allows it to be used for timing and output generation when most of the device is powered down, allowing simple tasks to be performed while the power consumption of the system is kept at an absolute minimum. The LETIMER can be used to output a variety of wave- forms with minimal software intervention. The LETIMER is connected to the Peripheral Reflex System (PRS), and can be configured to start counting on compare matches from other peripherals such as the RTCC.

Real Time Clock with Capture (RTCC)

The Real Time Clock with Capture (RTCC) is a 32-bit counter providing timekeeping down to EM3. The RTCC can be clocked by any of the on-board low-frequency oscillators, and it is capable of providing system wake-up at user defined intervals.

A secondary RTC is used by the RF protocol stack for event scheduling, leaving the primary RTCC block available exclusively for appli- cation software.

Back-Up Real Time Counter

The Back-Up Real Time Counter (BURTC) is a 32-bit counter providing timekeeping in all energy modes, including EM4. The BURTC can be clocked by any of the on-board low-frequency oscillators, and it is capable of providing system wake-up at user defined invervals.

Watchdog Timer (WDOG)

The watchdog timer can act both as an independent watchdog or as a watchdog synchronous with the CPU clock. It has windowed monitoring capabilities, and can generate a reset or different interrupts depending on the failure mode of the system. The watchdog can also monitor autonomous systems driven by the Peripheral Reflex System (PRS).

Communications and Other Digital Peripherals

Universal Synchronous/Asynchronous Receiver/Transmitter (USART)

The Universal Synchronous/Asynchronous Receiver/Transmitter is a flexible serial I/O module. It supports full duplex asynchronous UART communication with hardware flow control as well as RS-485, SPI, MicroWire and 3-wire. It can also interface with devices sup- porting:

• ISO7816 SmartCards
• IrDA
• I2S

Enhanced Universal Asynchronous Receiver/Transmitter (EUART)

The Enhanced Universal Asynchronous Receiver/Transmitter supports full duplex asynchronous UART communication with hardware flow control, RS-485 and IrDA support. In EM0 and EM1 the EUART provides a high-speed, buffered communication interface. When routed to GPIO ports A or B, the EUART may also be used in a low-energy mode and operate in EM2. A 32.768 kHz clock source allows full duplex UART communication up to 9600 baud.

Inter-Integrated Circuit Interface (I2C)

The I2C module provides an interface between the MCU and a serial I2C bus. It is capable of acting as both a master and a slave and supports multi-master buses. Standard-mode, fast-mode and fast-mode plus speeds are supported, allowing transmission rates from 10 kbit/s up to 1 Mbit/s. Slave arbitration and timeouts are also available, allowing implementation of an SMBus-compliant system. The interface provided to software by the I2C module allows precise timing control of the transmission process and highly automated trans- fers. Automatic recognition of slave addresses is provided in active and low energy modes. Note that not all instances of I2C are avalia- ble in all energy modes.

Peripheral Reflex System (PRS)

The Peripheral Reflex System provides a communication network between different peripheral modules without software involvement. Peripheral modules producing Reflex signals are called producers. The PRS routes Reflex signals from producers to consumer periph- erals which in turn perform actions in response. Edge triggers and other functionality such as simple logic operations (AND, OR, NOT) can be applied by the PRS to the signals. The PRS allows peripherals to act autonomously without waking the MCU core, saving power.

Pulse Density Modulation (PDM) Interface

The PDM module provides a serial interface and decimation filter for Pulse Density Modulation (PDM) microphones, isolated Sigma- delta ADCs, digital sensors and other PDM or sigma delta bit stream peripherals. A programmable Cascaded Integrator Comb (CIC) filter is used to decimate the incoming bit streams. PDM supports stereo or mono input data and DMA transfer.

Security Features

The following security features are available on the EFR32BG22:

• Secure Boot with Root of Trust and Secure Loader (RTSL)
• Cryptographic Accelerator
• True Random Number Generator (TRNG)
• Secure Debug with Lock/Unlock

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

The Secure Boot with RTSL authenticates a chain of trusted firmware that begins from an immutable memory (ROM).

It prevents malware injection, prevents rollback, ensures that only authentic firmware is executed and protects Over The Air updates. More information on this feature can be found in the Application Note AN1218: Series 2 Secure Boot with RTSL.

Cryptographic Accelerator

The Cryptographic Accelerator is an autonomous hardware accelerator which supports AES encryption and decryption with 128/192/256-bit keys, Elliptic Curve Cryptography (ECC) to support public key operations and hashes. Supported block cipher modes of operation for AES include:

• ECB (Electronic Code Book)
• CTR (Counter Mode)
• CBC (Cipher Block Chaining)
• CFB (Cipher Feedback)
• GCM (Galois Counter Mode)
• CBC-MAC (Cipher Block Chaining Message Authentication Code)
• GMAC (Galois Message Authentication Code)
• CCM (Counter with CBC-MAC)

The Cryptographic Accelerator accelerates Elliptical Curve Cryptography and supports the NIST (National Institute of Standards and Technology) recommended curves including P-192 and P-256 for ECDH(Elliptic Curve Diffie-Hellman) key derivation and ECDSA (El- liptic Curve Digital Signature Algorithm) sign and verify operations.

Supported hashes include SHA-1, SHA2/224, and SHA-2/256.

This implementation provides a fast and energy efficient solution to state of the art cryptographic needs.

True Random Number Generator

The True Random Number Generator module is a non-deterministic random number generator that harvests entropy from a thermal energy source. It includes start-up health tests for the entropy source as required by NIST SP800-90B and AIS-31 as well as online health tests required for NIST SP800-90C.

The TRNG is suitable for periodically generating entropy to seed an approved pseudo random number generator.

Secure Debug with Lock/Unlock

For obvious security reasons, it is critical for a product to have its debug interface locked before being released in the field.

In addition, the EFR32BG22 also provides a secure debug unlock function that allows authenticated access based on public key cryp- tography. This functionality is particularly useful for supporting failure analysis while maintaining confidentiality of IP and sensitive end- user data.

More information on this feature can be found in the Application Note AN1190: EFR32xG2x Secure Debug.

Analog

Analog to Digital Converter (IADC)

The IADC is a hybrid architecture combining techniques from both SAR and Delta-Sigma style converters. It has a resolution of 12 bits at 1 Msps and 16 bits at up to 76.9 ksps. Hardware oversampling reduces system-level noise over multiple front-end samples. The IADC includes integrated voltage reference options. Inputs are selectable from a wide range of sources, including pins configurable as either single-ended or differential.

Power

The EFR32BG22 has an Energy Management Unit (EMU) and efficient integrated regulators to generate internal supply voltages. Only a single external supply voltage is required, from which all internal voltages are created. An optional integrated DC-DC buck regulator can be utilized to further reduce the current consumption. The DC-DC regulator requires one external inductor and one external capaci- tor.

The EFR32BG22 device family includes support for internal supply voltage scaling, as well as two different power domains groups for peripherals. These enhancements allow for further supply current reductions and lower overall power consumption.

Energy Management Unit (EMU)

The Energy Management Unit manages transitions of energy modes in the device. Each energy mode defines which peripherals and features are available and the amount of current the device consumes. The EMU can also be used to implement system-wide voltage scaling and turn off the power to unused RAM blocks to optimize the energy consumption in the target application. The DC-DC regula- tor operation is tightly integrated with the EMU.

Voltage Scaling

The EFR32BG22 supports supply voltage scaling for the LDO powering DECOUPLE, with independent selections for EM0 / EM1 and EM2 / EM3. Voltage scaling helps to optimize the energy efficiency of the system by operating at lower voltages when possible. The default EM0 / EM1 voltage scaling level is VSCALE2, which allows the core to operate in active mode at full speed. The intermediate level, VSCALE1, allows operation in EM0 and EM1 at up to 40 MHz. The lowest level, VSCALE0, can be used to conserve power in EM2 and EM3. The EMU will automatically switch the target voltage scaling level when transitioning between energy modes.

DC-DC Converter

The DC-DC buck converter covers a wide range of load currents, provides high efficiency in energy modes EM0, EM1, EM2 and EM3, and can supply up to 60 mA for device and radio operation. RF noise mitigation allows operation of the DC-DC converter without significantly degrading sensitivity of radio components. An on-chip supply-monitor signals when the supply voltage is low to allow bypass of the regulator via programmable software interrupt. It employs soft switching at boot and DCDC regulating-to-bypass transitions to limit the max supply slew-rate and mitigate inrush current.

Power Domains

The EFR32BG22 has three peripheral power domains for operation in EM2 and EM3, as well as the ability to selectively retain configu- rations for EM0/EM1 peripherals. A small set of peripherals always remain powered on in EM2 and EM3, including all peripherals which are available in EM4. If all of the peripherals in PD0B or PD0C are configured as unused, that power domain will be powered off in EM2 or EM3, reducing the overall current consumption of the device. Likewise, if the application can tolerate the setup time to re-configure used EM0/EM1 peripherals on wake, register retention for these peripherals can be disabled to further reduce the EM2 or EM3 current.

Peripheral Power Subdomains

Reset Management Unit (RMU)

The RMU is responsible for handling reset of the EFR32BG22. A wide range of reset sources are available, including several power supply monitors, pin reset, software controlled reset, core lockup reset, and watchdog reset.

Core and Memory

Processor Core

The ARM Cortex-M processor includes a 32-bit RISC processor integrating the following features and tasks in the system:

• ARM Cortex-M33 RISC processor achieving 1.50 Dhrystone MIPS/MHz
• ARM TrustZone security technology
• Embedded Trace Macrocell (ETM) for real-time trace and debug
• Up to 512 kB flash program memory
• Up to 32 kB RAM data memory
• Configuration and event handling of all modules
• 2-pin Serial-Wire debug interface

Memory System Controller (MSC)

The Memory System Controller (MSC) is the program memory unit of the microcontroller. The flash memory is readable and writable from both the Cortex-M and DMA. In addition to the main flash array where Program code is normally written the MSC also provides an Information block where additional information such as special user information or flash-lock bits are stored. There is also a read-only page in the information block containing system and device calibration data. Read and write operations are supported in energy modes EM0 Active and EM1 Sleep.

Linked Direct Memory Access Controller (LDMA)

The Linked Direct Memory Access (LDMA) controller allows the system to perform memory operations independently of software. This reduces both energy consumption and software workload. The LDMA allows operations to be linked together and staged, enabling sophisticated operations to be implemented.

Memory Map

The EFR32BG22 memory map is shown in the figures below. RAM and flash sizes are for the largest memory configuration.

Configuration Summary

The features of the EFR32BG22 are a subset of the feature set described in the device reference manual. The table below describes device specific implementation of the features. Remaining modules support full configuration.

Configuration Summary

Electrical Specifications

Electrical Characteristics

All electrical parameters in all tables are specified under the following conditions, unless stated otherwise:

• Typical values are based on TA=25 °C and all supplies at 3.0 V, by production test and/or technology characterization.
• Radio performance numbers are measured in conducted mode, based on Silicon Laboratories reference designs using output pow- er-specific external RF impedance-matching networks for interfacing to a 50 Ω antenna.
• Minimum and maximum values represent the worst conditions across supply voltage, process variation, and operating temperature, unless stated otherwise.

Power Supply Pin Dependencies

Due to on-chip circuitry (e.g., diodes), some EFR32 power supply pins have a dependent relationship with one or more other power supply pins. These internal relationships between the external voltages applied to the various EFR32 supply pins are defined below. Exceeding the below constraints can result in damage to the device and/or increased current draw.

• VREGVDD & DVDD
• In systems using the DCDC converter, DVDD (the buck converter output) should be connected to the recommended LDCDC and CDCDC, and should not be driven by an off-chip regulator.
• In systems not using the DCDC converter, DVDD must be shorted to VREGVDD on the PCB (VREGVDD=DVDD)
• DVDD ≥ DECOUPLE
• PAVDD ≥ RFVDD
• AVDD, IOVDD: No dependency with each other or any other supply pin

Absolute Maximum Ratings

Stresses beyond those listed below may cause permanent damage to the device. This is a stress rating only and functional operation of the devices at those or any other conditions beyond those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. For more information on the available quality and relia- bility data, see the Quality and Reliability Monitor Report at http://www.silabs.com/support/quality/pages/default.aspx.

Absolute Maximum Ratings

General Operating Conditions

Table 4.2.  General Operating Conditions

DC-DC Converter

Test conditions: LDCDC = 2.2 µH (Samsung CIG22H2R2MNE), CDCDC = 4.7 µF (Samsung CL10B475KQ8NQNC), VVREGVDD = 3.0 V,
VOUT = 1.8 V, IPKVAL in EM0/1 modes is set to 150 mA, and in EM2/3 modes is set to 90 mA, unless otherwise indicated.

Table 4.3.  DC-DC Converter

DC-DC Operating Limits

The maximum supported voltage on the VREGVDD supply pin is limited under certain conditions. Maximum input voltage is a function of temperature and the average load current over a 10-year lifetime. Figure 4.1 Lifetime average load current limit vs. Maximum input voltage on page 23 shows the safe operating region under specific conditions. Exceeding this safe operating range may impact the reliability and performance of the DC-DC converter.

The average load current for an application can typically be determined by examining the current profile during the time the device is powered. For example, an application that is continuously powered which spends 99% of the time asleep consuming 2 µA and 1% of the time active and consuming 10 mA has an average lifetime load current of about 102 µA.

Figure 4.1. Lifetime average load current limit vs. Maximum input voltage
The minimum input voltage for the DC-DC in EM0/EM1 mode is a function of the maximum load current, and the peak current setting. Figure 4.2 Transient maximum load current vs. Minimum input voltage on page 23 shows the max load current vs. input voltage for different DC-DC peak inductor current settings.

Thermal Characteristics

Table 4.4.  Thermal Characteristics

Current Consumption

MCU current consumption using DC-DC at 3.0 V input

Unless otherwise indicated, typical conditions are: VREGVDD = 3.0 V. AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8 V from DC- DC. Voltage scaling level = VSCALE1. TA = 25 °C. Minimum and maximum values in this table represent the worst conditions across process variation at TA = 25 °C.

Table 4.5. MCU current consumption using DC-DC at 3.0 V input

MCU current consumption at 3.0 V

Unless otherwise indicated, typical conditions are: AVDD = DVDD = RFVDD = PAVDD = VREGVDD = 3.0 V. DC-DC not used. Voltage scaling level = VSCALE1. TA = 25 °C. Minimum and maximum values in this table represent the worst conditions across process variation at TA = 25 °C.

MCU current consumption at 1.8 V

Unless otherwise indicated, typical conditions are: AVDD = DVDD = RFVDD = PAVDD = VREGVDD = 1.8 V. DC-DC not used. Voltage scaling level = VSCALE1. TA = 25 °C. Minimum and maximum values in this table represent the worst conditions across process variation at TA = 25 °C.

MCU current consumption at 1.8 V

Radio current consumption at 3.0V using DCDC

RF current consumption measured with MCU in EM1, HCLK = 38.4 MHz, and all MCU peripherals disabled. Unless otherwise indica- ted, typical conditions are: VREGVDD = 3.0V. AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8 V powered from DCDC. TA = 25 °C. Minimum and maximum values in this table represent the worst conditions across process variation at TA = 25 °C.

Radio current consumption at 3.0V using DCDC

Flash Characteristic

Table 4.9.  Flash Characteristics

Wake Up, Entry, and Exit times

Unless otherwise specified, these times are measured using the HFRCO at 19 MHz.

Table 4.10.  Wake Up, Entry, and Exit times

RFSENSE Low-energy Wake-on-RF

Table 4.11. RFSENSE Low-energy Wake-on-RF

2.4 GHz RF Transceiver Characteristics

RF Transmitter Characteristics

RF Transmitter General Characteristics for the 2.4 GHz Band Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.12. RF Transmitter General Characteristics for the 2.4 GHz Band

1. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 1 Mbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.13. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 1 Mbps Data Rate

1. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 2 Mbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.14. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 2 Mbps Data Rate

1. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 500 kbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.15. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 500 kbps Data Rate

1. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 125 kbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.16. RF Transmitter Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 125 kbps Data Rate

1. RF Transmitter Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.17. RF Transmitter Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band

RF Receiver Characteristics

1. RF Receiver General Characteristics for the 2.4 GHz Band

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.18. RF Receiver General Characteristics for the 2.4 GHz Band

1. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 1 Mbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz, Packet length is 255 bytes.

Table 4.19. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 1 Mbps Data Rate

1. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 2 Mbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz, Packet length is 255 bytes.

Table 4.20. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 2 Mbps Data Rate

1. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 500 kbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz, Packet length is 255 bytes.

Table 4.21. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 500 kbps Data Rate

1. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 125 kbps Data Rate

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz, Packet length is 255 bytes.

Table 4.22. RF Receiver Characteristics for Bluetooth Low Energy in the 2.4 GHz Band 125 kbps Data Rate

1. RF Receiver Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band

Unless otherwise indicated, typical conditions are: TA = 25 °C, VREGVDD = 3.0V, AVDD = DVDD = IOVDD = RFVDD = PAVDD = 1.8  V powered from DCDC. Crystal frequency=38.4 MHz. RF center frequency 2.45 GHz.

Table 4.23. RF Receiver Characteristics for 802.15.4 DSSS-OQPSK in the 2.4 GHz Band

Oscillators

High Frequency Crystal Oscillator

Unless otherwise indicated, typical conditions are: AVDD = DVDD = 3.0 V. TA = 25 °C. Minimum and maximum values in this table represent the worst conditions across process variation, operating supply voltage range, and operating temperature range.

Table 4.24.  High Frequency Crystal Oscillator       

Low Frequency Crystal Oscillator

Table 4.25.  Low Frequency Crystal Oscillator

High Frequency RC Oscillator (HFRCO)

Unless otherwise indicated, typical conditions are: AVDD = DVDD = 3.0 V. TA = 25 °C. Minimum and maximum values in this table represent the worst conditions across process variation, operating supply voltage range, and operating temperature range.

Table 4.26. High Frequency RC Oscillator (HFRCO)

Fast Start_Up RC Oscillator (FSRCO)

Table 4.27. Fast Start_Up RC Oscillator (FSRCO)

Precision Low Frequency RC Oscillator (LFRCO)

Table 4.28. Precision Low Frequency RC Oscillator (LFRCO)

Ultra Low Frequency RC Oscillator

Table 4.29. Ultra Low Frequency RC Oscillator

GPIO Pins (3V GPIO pins)

Table 4.30.  GPIO Pins (3V GPIO pins)

Analog to Digital Converter (IADC)

Specified at 1 Msps, ADCCLK = 10 MHz, OSR=2, unless otherwise indicated.

Table 4.31.  Analog to Digital Converter (IADC)

Temperature Sense

Table 4.32.  Temperature Sense

Brown Out Detectors

DVDD BOD

BOD Thresholds on DVDD in EM0 and EM1 only, unless otherwise noted. Typical conditions are at TA = 25 °C. Minimum and maxi- mum values in this table represent the worst conditions across process variation, operating supply voltage range, and operating temperature range.

Table 4.33.  DVDD BOD                            

LE DVDD BOD

BOD thresholds on DVDD pin for low energy modes EM2 to EM4, unless otherwise noted.

Table 4.34.  LE DVDD BOD

AVDD and IOVDD BODs

BOD thresholds for AVDD BOD and IOVDD BOD. Available in all energy modes.

Table 4.35.  AVDD and IOVDD BODs

Revision History

Revision June, 2020

• 3.7.2 Cryptographic Accelerator: Removed text referencing DPA.
• 3.7.4 Secure Debug with Lock/Unlock: Removed text referencing Secure Element.
• 4.1 Electrical Characteristics:
• Expanded Power Supply Pin Dependencies section to include more details and restrictions on DECOUPLE
• Finalized remaining MIN / MAX specifications according to characterization and qualification results.
• Table 4.30 GPIO Pins (3V GPIO pins) on page 54: Relaxed 3.8 V, 125 °C GPIO maximum leakage specification on PA00, PA03, PB00, PC03, PC04, and PD00 from 400 nA to 550 nA.
• Corrected BLE Bit Error Rate conditions for sensitivity measurements with 255 byte payload.
• Added GPIO hysteresis specification.
• Updated DCDC lifetime condition guidance in 4.4.1 DC-DC Operating Limits.
• Expanded IADC descriptions to include information at higher oversampling ratios and added typical performance curve.
• Corrected tolerance of dimension “L” in Table 8.1 TQFN32 Package Dimensions on page 91.

Revision February, 2020

• 1. Feature List: Updated list slightly to highlight different features.
• Expanded 3.7 Security Features section and corrected security details.
• Added 3.9.2 Voltage Scaling section.
• 4.1 Electrical Characteristics:
• Additional characterization results and test limits added where available.
• Removed thermistor driver specification table until full software support becomes available.
• Updated 5.2 RF Matching Networks section with recommended match values.
• Updated 9.3 QFN40 Package Marking with mark details.

Revision December, 2019

• 4.1 Electrical Characteristics:
• Added detailed lifetime information to DC-DC specifications section.
• Additional characterization results and preliminary test limits added where available.
• Added DC-DC efficiency plots and updated supply current plots to 4.20 Typical Performance Curves.

Revision October, 2019

• In the front page block diagram, updated the lowest energy mode for LETIMER.
• Updated 3.5.2 Low Energy Timer (LETIMER) lowest energy mode.
• 1. Feature List updated with additional modulation formats, protocol stack, and security details.
• 2. Ordering Information:
• OPN numbering changes for security grade differentiator.
• Supported protocol stack details updated.
• 4.1 Electrical Characteristics:
• Additional characterization results and preliminary test limits added where available.
• Corrected maximum clock speed details in General Operating Conditions Table.
• Removed specification lines with 3 dBm output power conditions from RF transmit tables.
• Removed DECOUPLE BOD table.
• Added timing diagrams and specifications for PDM and USART SPI.
• Added 4.20 Typical Performance Curves.

Revision July, 2019

• 2. Ordering Information: Updated part number to revision C, added several new variants.
• 4.1 Electrical Characteristics: Added early silicon characterization data to several tables, and refined specification conditions.
• 4.1 Electrical Characteristics: Added flash electrical characteristics table.
• Minor wording edits for System Overview sections.

Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and “Typical” parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes without further notice to the product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Without prior notification, Silicon Labs may update product firmware during the manufacturing process for security or reliability reasons. Such changes will not alter the specifications or the performance of the product. Silicon Labs shall have no liability for the consequences of use of the information supplied in this document. This document does not imply or expressly grant any license to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any FDA Class III devices, applications for which FDA premarket approval is required, or Life Support Systems without the specific written consent of Silicon Labs. A “Life Support System” is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Silicon Labs disclaims all express and implied warranties and shall not be responsible or liable for any injuries or damages related to use of a Silicon Labs product in such unauthorized applications.

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SILICON Libs EFR32BG22 Wireless Gecko SoC Family Data Sheet – Download [optimized]
SILICON Libs EFR32BG22 Wireless Gecko SoC Family Data Sheet – Download