Users Manual

RF-BM-BG22A3(I)
www.szrfstar.com V1.3 - Aug., 2022
Shenzhen RF-star Technology Co., Ltd. Page 1 of 26
1 Device Overview
1.1 Module Series
There is a series of RF-BM-BG22Ax Bluetooth 5.2 Low Energy modules. All of them 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 as well.
Table 1. Module Series of RF-BM-BG22Ax
Model
Chip Model
Max. CPU
Speed
TX
Power
FLASH
RAM
Protocol
BG22A1
EFR32BG22C112F352GM32-C
38.4 MHz
0 dBm
352 KB
32 KB
BT5.2
BG22A1I
EFR32BG22C112F352GM32-C
38.4 MHz
0 dBm
352 KB
32 KB
BT5.2
BG22A3
EFR32BG22C224F512GM32-C
76.8 MHz
+6 dBm
512 KB
32 KB
BT5.2
Direction finding
Proprietary
BG22A3I
EFR32BG22C224F512GM32-C
76.8 MHz
+6 dBm
512 KB
32 KB
BT5.2
Direction finding
Proprietary
Note: RF-BM-BG22A1 and RF-BM-BG22A1I do not support AoA/AoD and LE Long Range (125 Kbps and 500 Kbps)
PHYs.
1.2 Description
RF-BM-BG22A3(I) is an RF module based on EFR32BG22C224F512GM32-C, one of the Gecko family of SoCs from
Silicon Labs, with a 32-bit ARM
®
Cortex
®
-M33 core with 76.8 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, Low Power Node of Bluetooth Mesh, Direction Finding AoA/AoD
and proprietary and also has a range of analog and digital interfaces such as PRS, ADC, UART, SPI, I
2
C, PWM, ISO
7816, IrDA, I
2
S, EUART and PDM. It features low power consumption, compact size, robust connection distance, and
rigid reliability. An integrated PA in the chip enables the module to reach up to 6 dBm TX power. 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.
1.3 Key Features
• RF Features
- Bluetooth 5.2 Low Energy
- Bluetooth Mesh Low Power Node
- Direction finding using Angle-of-Arrival (AoA) and
Angle-of-Departure (AoD)
- Proprietary
• Modulation
- 2 (G)FSK with fully configurable shaping
- OQPSK DSSS
- (G)MSK