BL66A0242 Smart Meter SoC, ARM-M0 Metering MCU with LCD Driver, RTC & Encryption

The BL66A0242 is a highly integrated Smart Meter SoC (System on Chip) designed specifically for single-phase energy metering applications. It integrates an ARM® Cortex-M0 CPU, high-precision Σ-Δ ADCs for metering, an on-chip LCD driver, RTC, encryption engine, and rich peripheral interfaces, making it ideal for compact and low-power smart meter designs.

Key Specifications

• CPU Core: ARM Cortex-M0

• Supply Voltage (VDD): 2.4V ~ 5.5V

• Flash Memory: 256KB

• RAM: 32KB

Metering & Measurement

• ADC: 3 × Σ-Δ ADC

• Measurement Features:

  • Active / Reactive Energy

  • Voltage, Current

  • Power, Frequency

LCD Driver

• 4 COM × 22 SEG

• 6 COM × 20 SEG

• 8 COM × 18 SEG

Peripherals & Interfaces

• GPIO: 42

• RTC: Yes

• Crystal: 32.768 kHz

• Encryption: AES-256 / AES-192 / AES-128

• I²C: 1

• SPI: 1

• UART: 4

• ISO7816: 2

Package

• LQFP64 (7 × 7 mm)

Applications

• Single-phase smart electricity meters

• Prepaid energy meters

• Smart energy monitoring systems

• IoT-enabled metering devices

Features

• Highly integrated Smart Meter SoC

• On-chip LCD driver (no external LCD IC required)

• Hardware AES encryption for secure data

• Integrated RTC for time-based billing

• Wide operating voltage range

• Optimized for low-power metering applications