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Uranus+? platform is an ultra-low power SoC platform implemented by UMC 55nm ultra-low-power process (55ULP) technology. This platform includes the ARM Cortex-M core-based microcontroller with 1MB embedded flash memory, targeting to accelerate the development of MCU related energy-efficient applications, such as Internet of Things (IoT), portable devices, and smart grid.


  • Ultra-Low power
    • Supply Voltage 2.97~3.63V (Regular Input and I/O operating)
  • ARM Cortex-M3 Processor Core
  • Embedded Memory
    • ROM 4kBytes with ISP function
    • Internal SRAM, 128kBytes
    • 1MBytes embedded Flash
  • Boot mode
    • Boot up from embedded ROM/SRAM/Flash
    • Boot up from External SPI Flash
  • Flash programming
    • ISP (In-system programming) via USB and UART interfaces
    • ICE via SWD interface
  • Compiler / Debugger
  • Peripheral
    • USB OTG 2.0/Host/Device full-speed
    • LCM 8080/6800 interface
    • High speed SPI for SPI flash
    • 2 I2C host/slave controllers
    • 2 SSP controllers with TI SSP - Motorola SPI, National Semiconductor Microwire, Philips I2S and Intel AC-link
    • 3 UARTs 16550 and hardware flow control
    • 64-bit General Purpose I/O
    • 8 channels 12-bit analog-to digital converters (ADC) controller, with voltage level detection.
    • DAC controller
    • One channel analog comparator
  • System Integration
    • DMA controller
    • 6 32-bit Timers with PWM
    • 6 32-bit General Purpose Timers
    • CRC module
    • RTC with calendar
    • Watchdog Timers
    • System controller unit for power management
    • ARM Serial Wire Debug (SWD)

Block Diagram

Tech Specs

Geometry nm55
Target Process NodeULP


  • 5 operation modes are supported with DVFS features
    • Dynamic operation voltage can be adjusted from 0.9V to 1.2V
    • Frequency scales from 32kHz to 70MHz (Turbo: 0.9V, 32MHz)
  • Including software/driver for Free RTOS, USB, file system, TCP/IP, etc.
  • Thoroughly validated on UMC 55ULP silicon

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