MKM34Z256VLL7

Enabling high accuracy, secure 1-, 2- & 3-phase electricity metering solutions through a powerful analog front end (AFE), auto-compensated iRTC with hardware tamper detection, segment LCD controller, rich security protection and multiple low power features in a 32-bit ARM Cortex -M0+ MCU. This product offers: • Enabling single-chip 1-, 2- & 3-phase metering designs • AFE, Security & HMI. Single crystal implementation • Single point of calibration during manufacture • Highest accuracy metrology with regional feature support • Multiple ?? ADCs with PGA • Supports neutral disconnect use case • Compliance with WELMEC/OIML recommendations • Memory & peripheral protection • Hardware tamper detect with time stamping • Low-power RTC, battery backup with tamper memory

• Core
  • ARM® Cortex®-M0+ core up to 75 MHz
  • Metering specific Memory Mapped Arithmetic Unit(MMAU)
• Clocks
  • 75 MHz high-accuracy internal reference clock
  • 32 kHz, and 4 MHz internal reference clock
  • 1 kHz LPO clock
  • 32.768 kHz crystal oscillator in iRTC power domain
  • 1 MHz to 32 MHz crystal oscillator
  • FLL and PLL
• System peripherals
  • Memory Protection Unit (MPU)
  • 4-channel DMA controller
  • Watchdog and EWM
  • Low-leakage Wakeup Unit (LLWU)
  • SWD debug interface and Micro Trace Buffer (MTB)
  • Bit Manipulation Engine (BME)
  • Inter-peripheral Crossbar Switch (XBAR)
• Analog Modules
  • 4 AFE channels (4× 24-bit ?? ADCs with PGA)
  • 16-channel 16-bit SAR ADC with 4 result registers
  • High-speed analog comparator containing a 6-bit DAC and programmable reference input
  • Internal 1.2 V reference voltage 10–15 pp