RF-Star RF-BM-BG22A1(I) Manual de usuario

RF-BM-BG22A1(I) EFR32BG22C112

Bluetooth 5.2 Low Energy Module

Version 1.3

Shenzhen RF-star Technology Co., Ltd.

August 12th, 2022

RF-BM-BG22A1(I)

www.szrfstar.com V1.3 - Aug., 2022

Shenzhen RF-star Technology Co., Ltd. Page 1 of 31

Silicon Labs BLE Module List

Chipset

Core

Flash

(KB)

RAM

(KB)

Power

(dBm)

Model

Antenna

Power

Consumption

(μA)

Dimension

(mm)

Range

(m)

Photo

EFR32BG2

2C112F352

GM32-C

38.4

MHz

M33

352

RF-BM-BG22A1

PCB/H

alf-

Hole

57.82

16.5  11.6

70 m

RF-BM-BG22A1I

IPEX/

Half-

Hole

57.82

16.5  11.6

120 m

RF-BM-BG22B1

PCB

57.82

15.2  11.2

EFR32BG2

2C224F512

GM32-C

76.8

MHz

M33

512

RF-BM-BG22A3

PCB/H

alf-

Hole

57.82

16.5  11.6

BLE:

BLE Long

Range

RF-BM-BG22A3I

IPEX/

Half-

Hole

57.82

16.5  11.6

BLE:

BLE Long

Range:

BLE Long

Range:

RF-BM-BG22C3

CHIP/

Half-

Hole

57.82

8.0  8.0

BLE:

BLE Long

Range:

Note:

1. All modules based on EFR32BG22C112F352GM32-C do not support AoA/AoD and LE Long Range (125 kbps and

500 kbps) PHYs.

2. All of the modules are based on Silicon Labs EFR32BG22 SoC series. Because the EFR32BG22 series ICs are

compatible in package, pins, and peripherals, those modules are pin-to-pin compatible with each other if there are

the same version of RF-star hardware version.

RF-BM-BG22A1(I)

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Shenzhen RF-star Technology Co., Ltd. Page 2 of 31

3. The power consumption is tested under 200 ms broadcast interval at 0 dBm TX power.

4. The transmission range is the longest distance obtained by testing the module's maximum transmission power in

an open and interference-free environment in sunny weather.

5. Click the picture to buy modules.

RF-BM-BG22A1(I)

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Shenzhen RF-star Technology Co., Ltd. Page 3 of 31

1 Device Overview

1.1 Description

RF-BM-BG22A1(I) is an RF module based on EFR32BG22C112F352GM32-C, one of the Gecko family of SoCs from

Silicon Labs, with a 32-bit ARM® Cortex®-M33 core with 38.4 MHz maximum operating frequency. It integrates a 38.4

MHz crystal, a matching, an antenna matching, a low-pass filter, and the antenna option (the one is a meander line

inverted-F PCB antenna and a half-hole ANT pin, and the other is the IPEX connector and a half-hole ANT pin). As for

the hardware, it supports Bluetooth 5.2 Low Energy and also has a range of analog and digital interfaces such as PRS,

ADC, UART, SPI, I2C, PWM, ISO 7816, IrDA, I2S, EUART and PDM. It features low power consumption, compact size,

robust connection distance, and rigid reliability. 1.27-mm pitch stamp stick package for easy assembling and cost-

effective PCB design. As for the firmware, it can be preprogrammed with an RF-star BLE5.0 serial communication

protocol for simple programming.

1.2 Key Features

•RF Features

- Bluetooth 5.2 Low Energy

•Modulation

- 2 (G)FSK with fully configurable shaping

•TX power: -28 dBm ~ 0 dBm

•Sensitivity

- -98.9 dBm @ 1 Mbit/s GFSK

- -96.2 dBm @ 2 Mbit/s GFSK

•32-bit 38.4 MHz ARM® Cortex®-M33 with DSP

instruction and floating-point unit for efficient signal

processing

•Memory

- Flash: 352 KB

- RAM: 32 KB

•Wide Operation Range

- Single power supply

⬧DC-DC mode: 2.2 V to 3.8 V

⬧Bypass mode: 1.8 V to 3.8 V

- Operating temperature: -40 °C to +85 °C

- Storage temperature: -40 °C to +125 °C

•Wide Peripherals

- 12-bit 1 Msps SAR ADC

- Up to 18 GPIOs with output state retention 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 RTC

- 24-bit Low Energy Timer for waveform generation

- 1×Watchdog Timer

- 2×Universal Synchronous/Asynchronous

Receiver/Transmitter

⬧UART

⬧SPI

⬧SmartCard (ISO 7816)

⬧IrDA

⬧I2S

- 1×Enhanced Universal Asynchronous Receiver /

Transmitter (EUART)

- 2×I2C interface with SMBus support

- Digital microphone interface (PDM)

- Precision Low-Frequency RC Oscillator enabling

single-crystal operation

- RFSENSE with selective OOK mode

- Die temperature sensor with +/-2 degree C

accuracy across temperature range

•Security Features

RF-BM-BG22A1(I)

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- 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

•Transmission range:

- RF-BM-BG22A1: 70 m (@ PCB antenna)

- RF-BM-BG22A1I: 120 m (@ external PCB antenna)

•Dimension: 16.5 mm x 11.6 mm x 2.06 mm

•RF-BM-BG22A1 Certificates:

- FCC

- CE

- SRRC

- RoHS

1.3 Applications

•Asset tags and beacons

•Consumer electronics remote controls

•Portable medical

•Sports, fitness and wellness devices

•Connected home

•Building automation and security

1.4 Functional Block Diagram

Figure 1. Functional Block Diagram of RF-BM-BG22A1(I)

EFR32

BG22

GPIOs

Debug

Reset

Low-Pass

Filter

Power Supply

DC-DC mode: 2.2 V to 3.8 V

Bypass mode: 1.8 V to 3.8 V

Antenna

Matching

38.4 MHz

Matching

Half-Hole

ANT Pin

PCB Antenna /

IPEX Connetor

Antenna

Switch

RF-BM-BG22A1(I)

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1.5 Part Number Conventions

The part numbers are of the form of RF-BM-BG22A1(I) where the fields are defined as follows:

Figure 2. Part Number Conventions of RF-BM-BG22A1(I)

BG22

Company Name

RF-STAR

Wireless Type

Bluetooth Module

Chipset

EFR32BG22 Series

Module Version

The A HW Version

IC Code

EFR32BG22C112

Antenna Type

I: IPEX Connector

                RF-BM-BG22A1(I) 
www.szrfstar.com                                                                         V1.3 - Aug., 2022 
Shenzhen RF-star Technology Co., Ltd.                                                                                                                    Page  6  of  31                        
 
Table of Contents 
Silicon Labs BLE Module List ........................................................................................................................................ 1 
Device Overview............................................................................................................................................................. 3 
1 Description............................................................................................................................................................ 3 
2 Key Features ....................................................................................................................................................... 3 
3 Applications.......................................................................................................................................................... 4 
4 Functional Block Diagram .............................................................................................................................. 4 
5 Part Number Conventions.............................................................................................................................. 5 
Table of Contents................................................................................................................................................................ 6 
Table of Figures................................................................................................................................................................... 7 
Table of Tables..................................................................................................................................................................... 8 
Module Configuration and Functions ...................................................................................................................... 9 
1 Module Parameters........................................................................................................................................... 9 
2 Module Pin Diagram .......................................................................................................................................10 
3 Pin Functions.....................................................................................................................................................10 
Specifications .................................................................................................................................................................12 
1 Recommended Operating Conditions .....................................................................................................12 
2 Handling Ratings..............................................................................................................................................12 
3 Current Consumption .....................................................................................................................................12 
Setting of Frequency Offset Register....................................................................................................................14 
Application, Implementation, and Layout.............................................................................................................16 
1 Module Photos..................................................................................................................................................16 
2 Recommended PCB Footprint....................................................................................................................16 
3 Schematic Diagram.........................................................................................................................................18 
4 Antenna................................................................................................................................................................18 
4.1 Antenna Design Recommendation ..............................................................................................18 
4.2 Antenna Output Mode Modification..............................................................................................19 
4.3 External Antenna Design Recommendation of the Half-Hole ANT Pin..........................20 
4.4 IPEX Connector Specification........................................................................................................21 
5 Basic Operation of Hardware Design ......................................................................................................22 
6 Trouble Shooting..............................................................................................................................................23 

                RF-BM-BG22A1(I) 
www.szrfstar.com                                                                         V1.3 - Aug., 2022 
Shenzhen RF-star Technology Co., Ltd.                                                                                                                    Page  7  of  31                        
5.6.1 Unsatisfactory Transmission Distance........................................................................................23 
5.6.2 Vulnerable Module..............................................................................................................................23 
5.6.3 High Bit Error Rate .............................................................................................................................23 
5.7 Electrostatics Discharge Warnings ...........................................................................................................24 
5.8 Soldering and Reflow Condition.................................................................................................................24 
5.9 Optional Package Specification .................................................................................................................26 
6 Certification .....................................................................................................................................................................28 
6.1 FCC.......................................................................................................................................................................28 
6.2 CE..........................................................................................................................................................................28 
6.3 SRRC ...................................................................................................................................................................29 
6.4 RoHS ....................................................................................................................................................................29 
7 Revision History ............................................................................................................................................................30 
8 Contact Us.......................................................................................................................................................................31 
 
 
Table of Figures 
Figure 1. Functional Block Diagram of RF-BM-BG22A1(I) ....................................................................... 4 
Figure 2. Part Number Conventions of RF-BM-BG22A1(I)....................................................................... 5 
Figure 3. Pin Diagram of RF-BM-BG22A1(I)................................................................................................10 
Figure 4. Photos of RF-BM-BG22A1(I)...........................................................................................................16 
Figure 5. Recommended PCB Footprint of RF-BM-BG22A1(I) (mm) ................................................17 
Figure 6. Schematic Diagram of RF-BM-BG22A1(I) .................................................................................18 
Figure 7. Recommendation of Antenna Layout ...........................................................................................19 
Figure 8. Antenna Output Mode Change of RF-BM-BG22A1................................................................19 
Figure 9. Antenna Output Mode Change of RF-BM-BG22A1I...............................................................20 
Figure 10. Reference Design of the External Antenna .............................................................................20 
Figure 11. Reference Design of the External Antenna Traces...............................................................20 
Figure 12. SI9000 Impedance Calculation Diagram..................................................................................21 
Figure 13. Specification of Antenna Seat.......................................................................................................21 
Figure 14. Specification of IPEX Wire .............................................................................................................22 
Figure 15. Recommended Reflow for Lead-Free Solder.........................................................................25 
Figure 16. Default Package by Tray.................................................................................................................26 
Figure 17. Package by Tape & Reel ................................................................................................................27 

                RF-BM-BG22A1(I) 
www.szrfstar.com                                                                         V1.3 - Aug., 2022 
Shenzhen RF-star Technology Co., Ltd.                                                                                                                    Page  8  of  31                        
Figure 18. FCC certificate of RF-BM-BG22A1.............................................................................................28 
Figure 19. CE certificate of RF-BM-BG22A1................................................................................................28 
Figure 20. SRRC certificate of RF-BM-BG22A1 .........................................................................................29 
Figure 21. RoHS certificate of RF-BM-BG22A1..........................................................................................29 
 
Table of Tables 
 
Table 1. Parameters of RF-BM-BG22A1(I) ..................................................................................................... 9 
Table 2. Pin Functions of RF-BM-BG22A1(I) ...............................................................................................10 
Table 3. Recommended Operating Conditions of RF-BM-BG22A1(I) ................................................12 
Table 4. Handling Ratings of RF-BM-BG22A1(I) ........................................................................................12 
Table 5. Current Consumption of RF-BM-BG22A1(I)................................................................................12 
Table 6. Temperature Table of Soldering and Reflow................................................................................24

RF-BM-BG22A1(I)

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Shenzhen RF-star Technology Co., Ltd. Page 9 of 31

2 Module Configuration and Functions

2.1 Module Parameters

Table 1. Parameters of RF-BM-BG22A1(I)

Chipset

EFR32BG22C112F352GM32-C

Supply Power Voltage

DC-DC mode: 2.2 V ~ 3.8 V, recommended to 3.3 V

Bypass mode: 1.8 V ~ 3.8 V, recommended to 3.3 V

Frequency

2402 MHz ~ 2480 MHz

Transmit Power

-28.0 dBm ~ 0 dBm (typical: 0 dBm)

Receiving Sensitivity

-98.9 dBm sensitivity @ 1 Mbit/s GFSK

-96.2 dBm sensitivity @ 2 Mbit/s GFSK

GPIO

Crystal

38.4 MHz

RAM

32 KB

Flash

352 KB

Package

SMT Packaging (1.27-mm half-hole pitch stamp stick)

Frequency Error

±24 kHz

Dimension

16.5 mm x 11.6 mm x 2.06 mm

Type of Antenna

RF-BM-BG22A1: PCB antenna, half-hole ANT pin

RF-BM-BG22A1I: IPEX connector, half-hole ANT pin

Transmission Range in Open Air

RF-BM-BG22A1: 70 m (@ PCB antenna)

RF-BM-BG22A1I: 120 m (@ external PCB antenna)

Operating Temperature

-40 ℃ ～ +85 ℃

Storage Temperature

-40 ℃ ～ +125 ℃

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