Interactive and courteous | Wear new technology and see the world!
When you get up in the morning and put on your glasses, you can clearly see the weather conditions and schedule of the day; when walking on the road, navigation maps and real-time traffic conditions will automatically appear in front of your eyes; when working and studying, whether you are browsing the web, checking information, or watching videos, you can This pair of glasses is complete…
As an extension of the digital world, smart glasses have created a new way for humans to obtain and communicate information, and are the focus of many technological innovators. In order to accelerate the design of smart glasses, Renesas has launched a smart glasses solution , which is based on the powerful RA8M1 MCU and can realize a variety of IoT functions, such as taking pictures, playing music, making calls, voice commands, and danger alerts.
System Block Diagram
Core device introduction
The RA8M1 used in the solution is the industry's first 32-bit microcontroller RA8 MCU based on the Arm ® Cortex ® -M85 core . It can achieve breakthrough performance of more than 3000 CoreMark scores at 480MHz frequency, with complete determinism, low latency and real-time operation. With advantages such as RA8M1’s machine learning (ML) capabilities, efficient audio and image processing can be performed at the edge. In addition, the MCU is equipped with large-capacity memory and rich peripheral interfaces, which can be optimized to meet various application needs.
As a wearable device, the power efficiency of the product is also extremely important. Therefore, Renesas has equipped this solution with the ISL91108 highly integrated buck-boost switching regulator, the P9222-R single-chip wireless charging receiver, and the ISL9301 high input voltage single-cell lithium-ion battery charger. Among them, the ISL91108 can accept input voltages higher or lower than the regulated output voltage. Unlike other buck-boost regulators , this regulator automatically transitions between operating modes without noticeable output disturbance.
The P9222-R single-chip wireless charging receiver IC (Rx) offers ultra-high efficiency at light loads, making it ideal for low-power applications. And the unique Ping detection function provides users with an early indication of wireless charger connection, improving thermal performance when the battery is fully charged. In addition, the chip's low undervoltage lockout (UVLO) threshold allows the receiver to activate over a wide range even when the transmitter emits a weak digital ping strength signal.
The ISL9301 high input voltage single-cell Li-ion battery charger features power path management to perform CC/CV charging functions required for Li-ion batteries. And the chip uses separate power paths to charge the system load and battery. This feature not only allows the system to operate with a fully discharged battery, but also allows charging to be terminated when the battery is fully charged while continuing to provide an input source to the system, thereby minimizing unnecessary charge/discharge cycles and extending battery life.
In addition, in order to ensure audio quality, the solution uses a mono high-fidelity codec DA7403 suitable for smart wearable devices , which has hybrid active noise reduction (ANC) and dual-microphone beamforming functions to ensure that in noisy environments Provides clear audio.
As the entrance to the world of the Internet of Things, this solution is equipped with the DA16600MOD module , which uses ultra-low-power Wi-Fi and Bluetooth chips to allow users to easily integrate multiple wireless connection functions. You can click at the end of the article to read the original text for more program information.
Sharing is polite
The emergence of smart glasses truly makes information visible wherever we look, providing us with a window into the digital world. In the future, Renesas will also use technological innovation to help explore more possibilities!
Forward this article to your circle of friends and send the shared screenshot to the Renesas Electronics official account, and we will randomly select 25 fans who forward it and give away a 10-yuan JD card.
Deadline for participating in the event: January 17
The list of winners and redemption methods will be announced in the comment area of this article next time. Remember to turn on the push reminder on the official account and check it in time~
*The final interpretation right of the event belongs to Renesas Electronics
京公网安备 11010802033920号