Renesas RA8E1 and RA8E2 entry-level Arm Cortex-M85 MCUs target cost-sensitive applications

Fast Prototyping Board for Renesas RA8E1

Renesas has expanded its Arm Cortex-M85-based RA8 series to include two new entry-level MCUs, RA8E1 and RA8E2. The new microcontrollers perform similarly to other Arm Cortex-M85-based microcontrollers and are offered at a lower price point thanks to a streamlined feature set to reduce costs. The RA8E1 and RA8E2 groups of microcontrollers will be useful for high-volume applications in industrial and home automation, healthcare, office equipment, and consumer products. We have previously covered other models in Renesas’ RA8 series, including the Renesas RA8T1, RA8D1, and the very first Cortex-M85 microcontroller, the Renesas RA8M1. The RA8 series consists of microcontrollers based on the Arm Cortex-M85 core with a performance of 6.39 CoreMark/MHz and Arm’s M-Profile Vector Extension which provides a 4x performance boost for DSP and ML workloads while maintaining low power consumption. The RA8E1 and RA8E2 Cortex-M85 microcontroller groups differ mostly in clock speed, available internal and external memory, communication interfaces, […]

Seeed Studio’s XIAO MG24 and XIAO MG24 Sense boards target battery-powered Matter and BLE applications

Seeed Studio XIAO MG24

Seeed Studio has added two members to its XIAO family of tiny MCU boards with the XIAO MG24 and XIAO MG24 Sense boards based on Silicon Labs EFR32MG24 multi-protocol wireless SoC and designed for battery-powered Matter over Thread and Bluetooth LE 5.3 applications. Both 21×17.8 mm USB-C boards feature a 78MHz Silabs MG24 Cortex-M33 microcontroller with 256kB SRAM and 1536KB flash, an additional 4MB SPI flash on-board, and 22 pins and pads for GPIO pins, analog inputs, and power signals, plus a reset button and two LEDs. The “Sense” model adds an analog microphone and a 6-axis IMU sensor. XIAO MG24/MG24 Sense specifications: SoC – Silicon Labs EFR32MG24 (EFR32MG24B220F1536IM48-B) MCU cores Arm Cortex-M33 @ 78.0 MHz with DSP instruction and floating-point unit for user application Arm Cortex-M0+ core for wireless Memory – 256 KB RAM Storage – 1536 KB flash Wireless protocols – Matter, OpenThread, Zigbee, Bluetooth Low Energy 5.3, […]

STMicro’s low-power ST1VAFE3BX AI biosensor integrates biopotential signal monitoring and motion tracking

STMicro ST1VAFE3BX biosensor

STMicroelectronics (STMicro) has announced the ST1VAFE3BX biosensor, a highly integrated chip that combines “cardio and neurological sensing with motion tracking and embedded AI functionalities,” and is targeted at healthcare and fitness wearables. The ST1VAFE3BX biosensor chip integrates biopotential inputs with an accelerometer and a machine learning core for reduced power consumption. It features a complete vertical analog front end (vAFE) for simplified detection of vital signs in electrocardiography, electroencephalography, and other healthcare monitoring applications. Inertial sensing by the accelerometer is synchronized with biopotential sensing “to infer any link between measured signals and physical activity.” The integrated machine-learning core (MLC) and finite state machine (FSM) allow for ultra-low-power and accurate biopotential input recognition at a degree of responsiveness that is reportedly faster than the current industry standard. The ST1VAFE3BX is aimed at applications in healthcare and fitness wearables such as smartwatches, smart patches, sports bands, connected rings, and smart glasses. It […]

Renesas RX260 and RX261 64 MHz RXv3 MCUs target power-efficient touch applications

Renesas RX260 RX261 RXv3 microcontrollers

The Renesas RX260 and RX261 two new 64 MHz microcontrollers part of the high-performance, high-efficiency RX product family with integrated capacitive touch-sensing and high power efficiency in both active and standby modes. The microcontrollers are based on the RXv3 core with a performance score of 355 CoreMark @ 64MHz, which is “2.5 times higher than competing 64 MHz class MCUs.” The chips are also power-efficient, with a consumption rate of 69μA/MHz during active operation and 1μA only in standby mode. According to Renesas, the chips are up to 25% more efficient in active mode and 87% more efficient in standby mode than other 64 MHz class MCUs. Another competing factor is the onboard 8KB of data flash, eliminating the need for external EEPROM. The RX260 and RX261 Group MCUs support noise- and water-resistant capacitive touch via Renesas’ third-generation capacitive touch IP (CTSU2SL). They also integrate an “automatic judgment function” that […]

Quectel BG770A-SN industrial IoT module offers 5G, NB-IoT, and NTN satellite connectivity

Quectel BG770A SN 5G IoT NTN module

Quectel has recently released the BG770A-SN industrial IoT module which comes in an ultra-compact form factor and supports both NTN and TN and features GNSS for positioning functionality. This 5G-ready module also supports iSIM and utilizes the GEO satellite constellation for worldwide coverage. Additionally, the module offers integrated security elements (ISE) and can operate in between the industrial temperature range of -40°C to +85°C. Previously we have written about the Quectel BG95-S5 5G NTN + LTE IoT module which supports NTN satellite (L-band and S-band) plus LTE Cat M1, Cat NB2, and eGPRS as fallback options, designed for applications where continuous connectivity is critical. We have also written about the Quectel CC660D-LS IoT-NTN module, which is an IoT NTN module designed specifically for Skylo’s satellite network. The new BG770A-SN module is a little different from the previous two because it supports LTE Cat M1, LTE Cat NB1/NB2, and NTN over […]

Microchip PIC32MZ-W1 is a 32-bit MIPS WiFi MCU with 60+ GPIO, USB, CAN Bus, Ethernet, and more

PIC32MZ W1 and WFI32 2.0 Curiosity Board

Microchip recently released the PIC32MZ-W1 wireless MCU along with 20 other WiFi parts, including WiFi MCUs, link controllers, network controllers, and plug-and-play modules. Among them, the PIC32MZ-W1 wireless MCU is the most interesting because of its 32-bit MIPS microAptiv M-class core running at up to 200MHz, advanced hardware security features, and integrated Microchip Trust Platform for secure cloud authentication. Over the years ESP32 MCUs have become the go-to choice for wireless applications. Still, one problem we always have with ESP32 SoCs is their limited GPIO option due to their strapped-out pin structures. But this new MCU has over 60 GPIO pins to work with along with Ethernet MAC, USB, CAN Bus, CANFD, SPI, I2C, SQI, UART, ADC, JTAG, and more. PIC32MZ-W1 wireless MCU specifications MCU MIPS32 M-Class core clocked at 200 MHz 16KB I-Cache, 16KB D-Cache microMIPS mode (up to 35% smaller code size) DSP extensions (4x 64-bit accumulators, single-cycle […]

XIAO ESP32S3 for Meshtastic & LoRa devkit features Wio-SX1262 LoRa module

XIAO ESP32 S3 LoRa dev kit

The “XIAO ESP32S3 for Meshtastic & LoRa” is an ESP32-S3 LoRa dev kit that combines an XIAO ESP32S3 board with the tiny Wio-SX1262 LoRa module connected through a board-to-board connector. This compact devkit supports LoRa (862-930MHz), Wi-Fi (2.4GHz), and Bluetooth 5.0 (BLE), with a 5km range for LoRa and a 100m+ range for Wi-Fi/BLE. The kit also has a USB Type-C interface, a built-in power management chip, and multiple I/O options such as IIC, UART, and GPIO. It supports external LoRa antennas and can be extended with XIAO expansion boards for more complex setups. These features make this device suitable for projects such as LoRaWAN gateways, IoT sensors, Meshtastic nodes or routers, and applications where space is limited. XIAO ESP32S3 for Meshtastic & LoRa specifications: SoC – Espressif Systems ESP32 with dual-core Xtensa LX7 microcontroller up to 240MHz Wireless Connectivity LoRaWAN via  Semtech LX1262 Output Power – Up to +22 […]

AirCard Pro and AirNotch Pro Bluetooth trackers support Google/Apple network integration (Crowdfunding)

AirCard Pro and AirNotch Pro Bluetooth trackers

Rolling Square introduces its latest Bluetooth trackers – AirNotch Pro and AirCard Pro – designed for use with personal items like keys, wallets, bags, and more. Both trackers are designed for portability, and the AirNotch Pro is designed as a keyring, while the AirCard Pro suits wallets with a thinner, credit card-like design. The products integrate into Apple and Google’s tracking networks, with some features currently limited to Apple. Previously, we covered the SenseCAP T1000, a credit card-sized LoRaWAN GPS tracker powered by Semtech’s LR1110. Several years ago we covered some Bluetooth beacons such as the Puck.js or RuuviTag, but we have yet to explore Bluetooth-only trackers with wireless charging capabilities. Rolling Square AirCard Pro Bluetooth trackers AirCard Pro technical features: Network White version – Operates on Google’s Android Find My Device network (Android 6 or above) Black version – Operates on Apple Find My network (iOS 14 or above) […]

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