Renesas with dedicated Single-Chip Microcontroller

Combining a high-performance 20 megahertz (MHz) 16-bit core with128 kilobytes (KB) of Flash memory and 7 KB of RAM, the new MCU integrates all the major functions required in a static electricity meter, including a dedicated electrical power calculation circuit, analogue-to-digital (A/D) converter, an LCD driver circuit, and a real-time clock (RTC) with an independent power supply. Primarily targeting conventional meter applications, the 78K0R/LG3-M MCU can be used together with other Renesas power-line and wireless communications solutions to create highly optimized and low cost smart meters. Key features of the 78K0R/LG3-M microcontroller (1) Support for increased meter functionality (2) On-chip DSP metrology engine with four second-order precision Sigma Delta 24-bit ADCs (differential input) and a two-channel 10-bit successive approximation ADC (3) Integration to reduce system costs (4) Ultra-low power consumption