1 Introduction to RA2L2 Product Features 110-nm low power process 48MHz Arm®Cortex®-M23 core Up to 128KB flash, 16KB SRAM, 4KB data flash 32pin to 64pin, LQFP, QFN packages Diverse interfaces such as USBFS, I3C, SSI, LPUART, and CAN 16-bit & 32-bit GPT, 32-bit LPAGT, RTC Operating temperature range: Ta=-40°C~125°C Wide operating voltage range: 1.6V-5.5V Security … Read more
Over the past decade, Japanese electronics companies have undergone significant restructuring, divesting low-profit or loss-making businesses, particularly in traditional home appliances, which have largely been sold off. The semiconductor sector has also been a key focus of this restructuring. According to recent reports, the long-established Japanese electronics company Panasonic will exit the semiconductor industry, selling … Read more
When performing network ADB debugging on the RK3399 Android 7.1.2, if multiple computers connect to the same Android device, the first connected computer can operate normally, while subsequent connections see the device status as OFFLINE. After analyzing the ADBD related code, it was found that there was no distinction made for ACCEPT Client handling, so … Read more
On RK3399 Android 8.1, we implement the silent installation feature for APKs. Below is our testing process:1. Generate the system signing KEY in the RK3399 Android 8.1 source directory: Navigate to the build/target/product/security directory: cd build/target/product/security Create a build_system_jks2.sh file with the following content: #!/bin/bash echo "Generating system signing file…" openssl pkcs8 -inform DER -nocrypt … Read more
Introduction Soldering is a crucial process in the manufacturing of electronic devices. The quality of soldering directly affects the performance of electronic circuits and devices. Excellent soldering quality provides good stability and reliability for circuits, while poor soldering methods can lead to component damage, significant testing difficulties, and potential hazards that prevent devices from functioning … Read more
Click the blue text to follow us In the PCBA processing workshop, every completed surface-mounted circuit board with program control must undergo a “digital enlightenment”—program burning. We understand that this step directly determines the functionality and market performance of electronic products.1. The Essence of Burning: The Fusion Hub of Hardware and SoftwareBurning is not merely … Read more
A certain audio product’s PCBA (wave soldering process) experienced burning during use. The failure rate was high when using Flux A, slightly decreased after cleaning, and dropped to zero after switching to Flux B. This article will explore the failure reasons through a series of professional testing and analysis methods. 1. Visual Analysis From visual … Read more
Click the blue text Follow us In the wave of Industry 4.0, the electronic manufacturing industry is undergoing a profound transformation from “mass production” to “customized production.” The multi-variety small-batch PCBA production model, with its advantage of flexibly responding to market demands, is gradually becoming the standard in fields such as consumer electronics, industrial control, … Read more
Recently, the project I am responsible for has started mass production, with the first batch planned to produce two hundred sets. During the production testing phase, it was found that seven PCBA boards had issues, with symptoms including: the boards not powering on, no signal on the acquisition channels, and programs unable to download…Upon hearing … Read more
Every day, the first thing I do when I wake up is browse Xianyu; I don’t even bother opening Taobao. Xianyu always surprises me with something new. While browsing, I discovered a great tool that can quickly locate short circuit positions on circuit boards.The rosin vaporizer family includes a brush, vaporizer, charging cable, instruction manual, … Read more