IOT Mobile Mini Reference Design

This all-inclusive design ensures that the AVR-IoT Mobile Mini is a perfect platform for creating safe, related, sensible IoT options.

The AVR-IoT Mobile Mini improvement board is a complete {hardware} platform designed to facilitate the analysis and improvement of IoT options. This platform integrates the Microchip AVR128DB48 AVR microcontroller, ATECC608B safe ingredient, and the GM02S mobile module, offering a sturdy basis for IoT purposes. Accompanying the event board is a Truphone SIM card with 150 MB of information, prepared for activation, simplifying the setup course of.

The AVR-IoT Mobile Mini is a compact and versatile demonstration and improvement platform, leveraging the AVR® microcontroller structure and mobile expertise. Its design simplifies IoT software improvement by dividing the duty into three main elements: The core elements of the design embrace being clever, related, and safe. The AVR128DB48 microcontroller represents the sensible performance. Connectivity is facilitated by way of the GM02S mobile module, which comes geared up with an antenna and SIM card. Safety is ensured by the ATECC608B safe ingredient. Integrating IoT mobile monitoring considerably enhances current merchandise by including mobile IoT capabilities. This integration and the streamlined design course of, helps cut back improvement time, accelerating time-to-market. Moreover, the board comes absolutely examined with all mandatory design information and software program, making certain reliability and ease of use.

The board helps varied energy sources, together with a USB port, Li-Ion/LiPo battery, or an exterior energy provide. It contains a buck converter for 3.3V with LDO standby mode and an LDO for 1.8V. Moreover, it consists of an MCP73830 Li-Ion/LiPo charger and a JST battery connector. The charger limits the cost present to 196 mA, stopping overcharging of small-capacity batteries, and terminates the cost cycle when the present drops beneath 37 mA or if it exceeds the protection timer of 4 hours. The AVR128DB48 MCU helps Multi-Voltage I/O (MVIO), with Port C designated for MVIO and powered from VDDIO2 at 1.8V. The MVSYSCFG fuse controls the MCU’s provide state; if set to single-supply mode, all pins in Port C can be tri-stated resulting from inadequate VDDIO2 provide voltage. The default MVSYSCFG fuse setting is dual-supply mode.

Energy to all board elements is routed by way of 5 cut-straps with 50-mil holes, clearly marked on the silkscreen for present measurement functions. The system voltage measurement circuit on the board makes use of the MIC94163 change and a voltage divider related to an ADC pin on the AVR128DB48, enabling on-demand measurement whereas stopping energy leakage by way of the voltage divider. The AVR-IoT Mobile Mini additionally consists of an on-board debugger for programming and debugging. This debugger is a composite USB system that includes a number of interfaces, making it a flexible software for builders. 

Microchip Technolgy has completely examined this reference design, which features a invoice of supplies (BOM), schematics, meeting drawing, and printed circuit board (PCB) structure. The corporate’s web site supplies further details about this reference design. To study extra, click on right here.