The ST85MM is a fully programmable power line communication (PLC) modem System on Chip (SoC), able to run any PLC protocol in the frequency band up to 500 kHz.

The device architecture has been designed to target CENELEC EN50065, FCC and ARIB compliant applications supporting major PLC protocol standards such as Meters and More and ITU G.9904 (PRIME).

• Programmable power line communication (PLC) modem System on Chip optimized for Meters and More protocol
• Integrated differential PLC analog front-end
  • PGA with automatic gain control and ADC
  • DAC with transmission pre-driver
  • Digital transmission level control
  • Zero crossing comparator
  • Up to 500 kHz PLC signal bandwidth
• High performance, fully programmable realtime engine dedicated to PLC PHY and real time MAC protocol management (400 MHz max. frequency)
  • Dedicated code and data SRAM memories
• Standard ARM^® 32-bit Cortex^®-M4F fully programmable core for protocol upper layers and peripherals management
  • 200 MHz maximum frequency
  • 256 kB of embedded SRAM for code and data
  • 96 kB of embedded SRAM for data
  • 8 kB of embedded shared RAM
  • Bootloader ROM memory
  • One Time Programmable (OTP) memory with dedicated areas available for secure keys and user information storage
  • Serial wire and JTAG interfaces
  • 24 multiplexed GPIOs
  • 4 general purpose timers
  • 25 MHz external crystal for system clock
  • Integrated 25 MHz oscillator (XOSC) with frequency synthesizer (FS) and pre-scaler units to generate internal clock signals
• Power management
  • 3.3 V external supply voltage for I/O and analog
  • 2.5 V internal linear regulator for analog
  • 1.1 V external supply voltage for digital
  • Normal, Slow, Doze and low power modes
• Available in QFN56 package
• -40 °C to +105 °C temperature range