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M31 Low Power Solution for IoT Applications




Overview


Low power designs are very critical in mobile and IoT applications. M31 low power solution is comprehensive for low power designs including the green memory, low VCCMIN memory, low power cell library, Ultra-Low Power Fractional PLL (ULFPLL), and low power interface IP like USB 2.0 and USB 1.1. M31 green memory provides low power modes including standby, nap, retention, and power shutdown. The dual rail architecture is also built in the green memory for dynamic frequency and voltage scaling. M31 low VCCMIN memory supports low voltage operation to reduce leakage and dynamic power directly. In order to achieve low power SoC design, M31 low power cell library is the critical component. Not only low power optimized cells but also power management kits are included.

M31 Ultra-Low Power Fractional PLL (ULFPLL) can operate at very low voltage (0.7V) and provide a reliable clocking source for SoC. M31 low power USB 2.0 and USB 1.1 IP are optimized for IoT applications and can save more than 30% operating current and 70% stand-by current.




Low Power Cell Library Features


  • Power management kit
    • Power gating cells
    • Level shifters
    • Isolation cells
    • Retention flip-flops
  • Low leakage Library
    • Ultra-low leakage devices design with thick-gate library
    • Level Shifter, wide-range voltage support between core and IO
  • Low Power Optimization Kit
    • Multi-bit flip-flop (MBFF)
    • Small input capacitance cells
    • Fine-grain cells
  • Low dynamic power
    • Shorter routing trace and less parasitic capacitance than conventional high density library
    • Less internal power than conventional high density library



Green Memory Compiler Features


  • Tiny architecture
    • Ultra-high density structure to save area
  • Dual rail
    • Separate the logic power and core power with embedded level shifter (Save dynamic power and leakage power)
  • Green power management
    • Standby, nap, retention, shutdown



Low Power Interface IP Features


  • Core voltage of USB 2.0/USB 1.1 IP is as low as 0.9V (55nm)
  • Ultra-low current consumption at both operating and stand-by modes



Ultra-Low Power Fractional PLL (ULFPLL) Features


  • Low operating voltage
  • Tiny architecture



Low VCCMIN Memory Compiler Features


  • Dynamic voltage and frequency scaling
    • Provide wide range speed and power optimization
  • Low voltage
    • Under drive operation