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ARM® Processors

RM4 ARM Cortex™-R4 Microcontrollers


The Hercules RM4x Safety MCU family enables customers to easily develop safety critical industrial and medical applications. The RM46x ARM® Cortex™-R4F core offers up to 220MHz of floating point performance, more than 350 DMIPS. With integrated safety features, advanced connectivity options, and flexible real-time control peripherals, the RM4x family is an ideal solution for industrial and medical applications with specific safety requirements.

RM4x Block Diagram

Click diagram to enlarge

Key features

  • Up to 220 MHz, ARM Cortex-R4F CPU
  • Lock-Step CPUs with fail safe detection logic
  • Up to 3 MB of Embedded Flash Memory with ECC
  • Ethernet, USB, CAN Network Interfaces
  • Dual 12-bit ADC, 16 shared channels
  • Timer Co-Processer for PWM and input capture
  • Package options: 144 QFP and 337 BGA

Key benefits

  • Architected for safety critical applications
  • ARM Cortex-R4F with Floating Point (single and double precision)
  • Advanced connectivity options
  • Flexible real-time control peripherals
  • Robust communication interfaces
  • Development network and support

Key applications

  • Industrial Automation
  • Safe PLC's (Programmable Logic Controllers)
  • Power Generation and Distribution
  • Turbines and Windmills
  • Ventilators and Defibrillators
  • Infusion and Insulin pumps
  • Radiation therapy
Technical resources

Products sampling now
  • RM42L432
    ARM Cortex-R4 Lockstep
    384KB Flash, 32KB RAM
    100QFP Package
  • RM46L852
    ARM Cortex-R4F Lockstep
    1.25MB Flash, 192KB RAM
    144QFP, 337BGA Package
  • RM48L952
    ARM Cortex-R4F Lockstep
    3MB Flash, 256KB RAM
    144QFP, 337BGA Package


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