Basic definition and core location of Sub-1GHz wireless MCU
A Sub-1GHz wireless MCU is a microcontroller unit that integrates Sub-1GHz radio frequency (RF) wireless communication capabilities. By integrating the computing and control functions of a general-purpose MCU with low-power, long-range wireless communication capabilities on a single chip, it acts as the core component designed specifically for low-power wide-area Internet of Things (IoT) applications.
Sub-1GHz wireless MCU2. Performance advantages compared with 4GHz solution
Compared with conventional 2.4GHz band wireless communication solutions, solutions operating in the Sub-1GHz band (typically covering license-free bands including 169MHz, 433MHz, 470MHz, 868MHz, and 915MHz) feature longer wavelengths, which deliver enhanced diffraction capability and lower path loss, thus endowing the solution with superior signal propagation characteristics. Under the same transmit power, the communication range of a Sub-1GHz solution can reach 3 to 5 times that of a 2.4GHz solution, and can extend to several kilometers in open environments. In addition, Sub-1GHz solutions boast better wall-penetration and obstacle-crossing performance, making them more suitable for wireless data transmission in environments with complex obstructions.
Sub-1GHz wireless MCU23. Integrated architecture and cost advantages
As a monolithic integrated solution, Sub-1GHz wireless MCUs eliminate the requirement for external discrete RF chips and matching circuits. Compared with the separated "MCU + discrete RF chip" architecture, this solution significantly reduces the number of peripheral components and printed circuit board (PCB) footprint, while lowering hardware design complexity and overall bill of materials (BOM) costs. Furthermore, the integrated architecture delivers more stable communication performance and lower overall power consumption.
In terms of power management, current mainstream Sub-1GHz wireless MCUs generally support multiple low-power operating modes, with sleep current dropping as low as the nanoampere level. Combined with low-power wake-up mechanisms, the device can operate continuously for years relying on a single coin cell battery, which perfectly meets the application requirements of battery-powered passive low-power sensor nodes.
Typical Application Scenarios and Protocol Compatibility of Sub-1GHz Wireless MCU234
At present, Sub-1GHz wireless MCUs have been widely applied in smart metering (remote reading of water, electricity and gas meters), smart home sensing, industrial wireless sensor networks, environmental monitoring for smart agriculture, smart parking, asset positioning and tracking, remote industrial control and other fields. These application scenarios generally have clear requirements for communication range, low power consumption and wall-penetration capability. Meanwhile, constrained by cost and deployment volume, complex external RF designs are difficult to implement, and the characteristics of Sub-1GHz wireless MCUs exactly match the demands of such scenarios. Sub-1GHz wireless MCUs launched by different manufacturers at present are generally compatible with mainstream IoT communication protocols, such as LoRaWAN, Wi-SUN, Sigfox and various proprietary protocols. Developers can flexibly select a suitable protocol stack based on actual application scenarios to quickly complete product development and market launch.
Specific models of Sub-1GHz wireless MCUs
The CC430 series of ultra-low-power system-on-chip (SoC) microcontrollers integrate an on-chip RF transceiver core and offer a variety of devices with distinct peripheral configurations, enabling adaptation to a broad spectrum of application scenarios. This architecture is specifically optimized to operate across five low-power modes, which effectively prolongs battery lifespan for portable metering application scenarios. The device integrates the high-performance MSP430 16-bit RISC CPU, 16-bit general-purpose registers, and a constant generator; the synergistic operation of these modules achieves maximum code execution efficiency.
Via the tight integration of the microcontroller core, peripheral modules, supporting software and RF transceiver, the CC430 series provides fully integrated system-on-chip solutions, which feature outstanding ease of development while delivering elevated system performance.
The CC430F61xx series adopts an SoC microcontroller architecture that integrates the high performance of the advanced CC1101 sub-1GHz RF transceiver with the MSP430 CPUXV2. It provides up to 32KB of in-system programmable flash memory, up to 4KB of RAM, two 16-bit timers, a high-performance 12-bit ADC (with 8 external inputs plus internal temperature and battery sensors on CC430F613x devices), a comparator, USCI, a 128-bit AES security accelerator, a hardware multiplier, DMA, an RTC module with alarm functionality, an LCD driver, and up to 44 I/O pins.
Sub-1GHz Wireless MCU Specifications
|
Protocols |
Proprietary |
|
Modulation scheme |
(G)MSK, 2(G)FSK, 4(G)FSK, ASK, OOK |
|
Frequency bands |
315 MHz, 433 MHz, 779 MHz, 868 MHz, 915 MHz, 920 MHz |
|
Type |
Wireless MCU |
|
TX power (max) (dBm) |
13 |
|
RAM (kByte) |
2 |
|
Flash memory (kByte) |
16 |
|
Security |
Cryptographic acceleration |
|
Cryptographic accelerators |
AES |
|
CPU |
MSP430 |
|
Peripherals |
1 SPI, 1 UART, 1 timer, 12-bit ADC, I2C |
|
Sensitivity (best) (dBm) |
-117 |
|
Number of GPIOs |
30 |
|
RX current (lowest) (mA) |
15 |
|
Data rate (max) (Mbps) |
0.5 |
|
Rating |
Catalog |
|
Operating temperature range (°C) |
-40 to 85 |
|
Edge AI enabled |
No |
Hot Tags: sub-1 ghz wireless mcus, China sub-1 ghz wireless mcus manufacturers, suppliers, Automotive Wireless Connectivity Products, Proprietary Wireless Protocols, Sub 1 GHz Transceivers, Sub 1 GHz Wireless MCUs, wireless connectivity, Wireless Multiprotocol
