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Sub-GHz compatible evaluation board "LAUNCHXL-CC1310"
LAUNCHXL-CC1310 is a wireless evaluation board provided by Texas Instruments.
The greatest feature of this product is that it can perform Sub-GHz communication, but did you know that the frequencies available for Sub-GHz differ from country to country?
Before explaining the details of the product, we will first explain Sub-GHz, including the differences from the 2.4GHz band wireless standard.
What kind of standard is Sub-GHz?
Sub-GHz is a general term for wireless communications using frequency bands below 1 GHz. It has various advantages when compared with other standards, such as:
Comparison between Sub-GHz (920MHz band) and 2.4GHz band
| Item | 920MHz | 2.4GHz | remarks | |||
| Wifi | ZigBee | Bluetooth | BLE | |||
| Communication distance (Outlook) |
◎ | ○ | △ | △ | × | The 920MHz band has about three times the communication distance of the 2.4GHz band |
| wraparound characteristics | ○ | × | × | × | × | The 920MHz band has about 10 times more wraparound than the 2.4GHz band |
| radio wave interference | ○ | × | × | × | × | The 920MHz band is a newly released frequency, so it is difficult to interfere |
| throughput | ○ | ◎ | △ | ○ | △ | Wi-Fi for large data transfer |
| Low power consumption | ◎ | × | ○ | △ | ◎ | For wireless communication over the same distance, the 920MHz band consumes less power. |
| Connectivity with smartphones | △ | ◎ | △ | ◎ | ◎ | Wi-Fi/Bluetooth/BLE can be easily connected to smartphones |
A frequency band that is resistant to obstacles due to its excellent wraparound characteristics
Compared to 2.4GHz, Sub-GHz has better wraparound characteristics. In general, it is said that waves with short wavelengths do not spread easily after passing through obstacles. However, long wavelength waves such as Sub-GHz can spread around obstacles even after passing through them.
Frequency bands that can be used are different in each country
As explained at the beginning, the frequency bands that can be used differ from country to country. Therefore, it should be noted that the same frequency cannot be used universally. Japan is assigned the 920MHz band, Europe is assigned the 868MHz band, and the United States is assigned the 915MHz band.
Three features of LAUNCHXL-CC1310
Here, we will introduce three features of LAUNCHXL-CC1310, excluding Sub-GHz communication.
1. Equipped with 3 processor cores
The main CPU of CC1310 is Arm's Cortex®-M3. In addition, CC1310 is equipped with FLASH, RAM, and DC-DC converter, making it possible to operate with a single chip.
As peripherals, serial interfaces such as GPIO, I2C, and UART, and timers are installed. Also, there is an RF Core in the upper right of the figure below, which is the RF function and controls wireless communication with Cortex®-M0.
Furthermore, the Sensor Controller in the lower right of the figure is configured so that external sensor data can be acquired by this controller alone. As a result, sensor data acquisition and wireless communication can be performed without going through the main CPU.
2. Achieving operation with low power consumption
The score of the benchmark "ULPBench" that evaluates the energy consumption efficiency of the processor has a high value of 158.
In addition to adopting the 65nm rule instead of the conventional 0.18um process, it integrates a switching DC/DC converter to step down +3.3V input to +1.8V. This is because it plays the role of supplying the inside of the IC.
In the past, we used LDO regulators, but DC/DC converters have overwhelmingly higher conversion efficiency, which contributes to the reduction of power consumption.
3. Support Japan (920MHz), Europe (868MHz) and USA (915MHz) with same BOM and PCB design
The CC1310 supports the following standards, making it suitable for systems that are being considered for use around the world.
- ETSI EN 300 220, EN 303 204 (Europe)
- FCC CFR47 Part 15 (USA)
- ARIB STD-T108 (Japan)
※Notes
LAUNCHXL-CC1310 has not obtained Japanese technical standard conformity certification. It is illegal to use it outside of an anechoic chamber or box, so please use it at your own discretion.
If you are thinking of obtaining technical standards compliance certification yourself, please refer to Macnica 's article on how they actually obtained technical standards compliance certification for 25 LAUNCHXL-CC1310 units.
The road to obtaining technical standards conformity certification Episode 1: “Let’s get technical standards compliance”
The road to obtaining technical standards conformity certification Episode 2 “Document preparation”
The road to obtaining technical standards conformity certification Episode 3 “Test implementation”
Application example
- building automation equipment
- industrial equipment
- Security system
- smart meter
- wireless sensor network
Included contents
| Type name | LAUNCHXL-CC1310 |
| accessories |
|
Click here for recommended articles/materials
I tried to measure the flight distance of Sub-GHz band wireless communication Part 1 "Let's try it first"
I tried to measure the flying distance of Sub-GHz band wireless communication Part 2 "Improved and challenged 2 km"
The road to technical standard conformity certification Episode 1 "Let's get technical standards"
The Road to Technical Regulations Conformity Certification Episode 2 "Preparing Documents"
The Road to Acquiring Technical Standards Conformity Certification Episode 3 “Examination”
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LAUNCHXL-CC1310
*Since this evaluation board has not acquired domestic technical certification, please use it at your own discretion.