The NuMicro® M55M1 series microcontrollers stand out for their exceptional performance in digital signal processing and in-device machine learning inference. They are equipped with an Arm® Cortex®-M55 processor running up to 200 MHz. In addition to the Cortex-M55 core, they integrate an Arm® Ethos®-U55 Neural Processing Unit (NPU) as a coprocessor for accelerating neural network operations. The M55M1 series MCU has up to 1.5 MB of SRAM and 2 MB of flash memory for on-chip storage and adopts OctoSPI and HyperBus interfaces to support the expansion of RAM and flash memory capacity. It supports a low power supply voltage range from 1.6V to 3.6V and can operate within a temperature range of -40°C to +105°C.
The M55M1 microcontroller possesses abundant computational resources, including DSP extensions, vector extensions, FPU, and NN accelerator, as well as up to 1.5 MB of SRAM and 2 MB of flash memory, making it an ideal choice for embedded applications. It is particularly suitable for processing-intensive workloads such as audio, communications, digital signal processing, machine learning, sensor fusion, and motor control.
Security is another key feature of the M55M1 series. It supports secure boot, TrustZone, TRNG, key storage, cryptographic accelerators, tamper detection, and PSA-level3 compliance, significantly enhancing the security and integrity of systems built with the M55M1.
In terms of analog and control functions, the M55M1 series features 2 sets of 12-bit 5MSPS SAR ADC, 2 sets of 12-bit 1MSPS buffered DAC, 4 analog comparators, 1 built-in temperature sensor, 1 internal voltage reference module, up to 24-channel 200 MHz PWM output, 4 QEI, and 4 input capture units.
The M55M1 series also offers a rich set of communication and peripheral interfaces, including Universal Serial Control Interface (USCI) configurable as UART/SPI/I2C, with up to 10 sets of UART, 4 sets of SPI/I2S, 4 sets of I2C, 2 sets of CAN FD, 2 sets of QSPI, 1 USB 2.0 high-speed OTG/host/device, 1 USB 2.0 full-speed OTG/host/device, 1 10/100 Ethernet MAC with RMII, 1 8-bit parallel camera interface (CCAP), 2 PDM with internal filters, and 2 SDIO.