Back to Nuvoton

Nuvoton M481 NuMicro® Base Microcontrollers (MCUs)

Nuvoton M481 NuMicro® Base Microcontrollers (MCUs) are high-performance and low-power MCUs embedded with up to 192MHz Arm® Cortex®-M4F core, delivering 1.25DMIPS per MHz. These MCUs feature 512KB/256KB/128KB zero-wait state Flash memory, 160KB/128KB/64KB SRAM, 16-channel peripherals DMA controller, and 80 bytes of battery-powered backup registers. The M481 MCUs include a factory pre-loaded bootloader that delivers secure boot functionality to provide the code integrity check in embedded Flash memory. These MCUs are equipped with high-speed UART/SPI/I2C/PWM peripherals. The M481 MCUs consist of built-in secure protection ROM that provides a safe space for saving confidential data or programs. These MCUs are used in IoT devices and data controller applications.

Features

  • Core:
    • Up to 192MHz Arm® Cortex®-M4F delivering 1.25DMIPS per MHz
    • DSP instruction set
    • Memory Protection Unit (MPU)
  • Memory:
    • 512KB/256KB/128KB zero-wait state Flash memory
    • 160KB/128KB/64KB SRAM
    • 4KB secure protection ROM
    • 2KB one-time programmable ROM
  • Communication interfaces:
    • Up to 6 low-power UART interfaces (17Mbps), including 2 LIN interfaces
    • Up to 3 ISO-7816 interfaces (3.4MHz), supporting full-duplex UART mode
    • 3 I2C interface (up to 3.4Mbps)
    • 1 SPI Flash interface (up to 96MHz) supports quad mode
    • 1 quad-SPI interface (up to 96MHz)
    • Up to 4 SPI/I2S interfaces (SPI up to 96MHz, I2S up to 192kHz/16-bit)
    • 1 I2S interface (192kHz/32-bit)
    • 2 secure digital host controllers (50MHz)
    • 2 USCI interfaces supporting configurable UART/SPI/I2C
  • Timer and PWM:
    • 4 32-bit timers
    • 12 enhanced PWM with 12 16-bit timers
    • 12 basic PWM with 2 16-bit timers
    • 1 24-bit count-down SysTick timer
    • 1 watchdog timer
    • 1 window watchdog timer
  • Clocks:
    • 4MHz to 24MHz crystal oscillator
    • 32kHz oscillator for RTC
    • Internal 12MHz RC oscillator
    • Internal 10kHz RC oscillator
    • Internal PLL up to 480MHz
  • Analog peripherals:
    • 1 12-bit, up to 16-channel 5MSPS SAR ADC
    • 2 12-bit, 1MSPS DAC
    • 2 rail-to-rail comparators
    • 2 operational amplifiers
  • Control interface:
    • 2 quadrature encoder interfaces
    • 2 24-bit, 3-channel input capture timer/counter units
  • 16-channel peripheral DMA controller
  • LCD parallel interface and i80 mode external Bus interface
  • 80 bytes of battery-powered backup registers
  • Operating conditions:
    • 1.8V to 3.6V voltage range
    • -40°C to 105°C temperature range

Applications

  • IoT devices
  • Data collectors
Published: 2025-04-16 | Updated: 2025-06-02