MCXA155VLL is a MCX A1 series microcontroller. MCX A1 series all-purpose microcontrollers (MCUs) address a wide range of applications with scalable device options, low power and intelligent peripherals. The MCX A1 series Arm® Cortex®-M33 general purpose MCUs with high levels of integration and analogue. The low power cache enhances the system performance with built-in RAM self-test hardware and supporting safety applications. The innovative power architecture is designed to support high utilization of I/Os and power efficiency with a simple supply circuit in a smaller footprint. Designed to support more GPIO pins for additional external connections, the MCX A1 allows designers to utilize a smaller package, simpler board design and lower system BOM costs. Target applications include sensing & metering, building control & automation, smart circuit breaker, home appliances, USB accessories, compressor drive, smart lighting, hand-held devices, power tools and IoT nodes.