Overview

Within the microcontroller (MCU) lineup offered by Renesas, the RX200 Series and RL78 Family provide the high performance, large memory capacity, and low power consumption required by three-phase meters. Above all, the RX21A Group and RL78/I1C Group of microcontrollers can control the power meter, reduce costs by reducing the number of external components and improve operability with the built-in 24-bit ΔΣ (delta-sigma) ADC in addition to the main features. Also they support enhanced security functions with AES H/W integration for smart meters. Renesas offers a lineup of microcontrollers with built-in Sub-GHz and Power Line Communication (PLC) functions essential to smart meters.

Power Meter (Three-Phase)

System Block Diagram (Main Control Block: MCU with Embedded ΔΣADC)

System Block Diagram (Main control block: MCU with embedded ΔΣADC)

System Block Diagram (Main Control Block: MCU with no Embedded ΔΣADC)

System Block Diagram (Main control block: MCU with no embedded ΔΣADC)

System Block Diagram (Sensor and Power Supply Block)

System Block Diagram (Sensor and power supply block)

Recommended Products
Block Semiconductor device Recommended products Features, etc.
Control MCU MCU (ΔΣ ADC integrated) RL78/I1C Group 16-bit CPU, 24-bit ΔΣADC, LCD controller/driver, battery back up, AES
RX21A Group 32-bit CPU, low power consumption,
high capacity memory,
24-bit ΔΣADC(7units, SNDR 85dB)
MCU RL78/L1x Series 16-bit CPU, ultra low power consumption,
LCD driver
RX210 Group 32-bit CPU (50MHz max), high capacity memory,
low power, max 7ch communication function
RX220 Group 32-bit CPU (32MHz max), low pin count,
low power, max 5ch communication function
Communication control block MCU RL78/G13 Group 16-bit CPU
RX210 Group 32-bit CPU (50MHz max), high capacity memory,
low power, max 7ch communication function
RX220 Group 32-bit CPU (32MHz max), low pin count,
low power, max 5ch communication function
RX631 Group 32-bit CPU
RS485 signal I/F Photocoupler
(standard)
PS23xx Series
PS27xx Series
PS28xx Series
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C
High isolation voltage (3.75kVr.m.s.), 4p-SOP, Ta=110°C
High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=110°C
Photocoupler
(high-speed)
PS91xx Series
(SOP)
PS93xx Series
(SDIP)
PS98xx Series
(Small SOP)
PS99xx Series
(LSDIP)
Digital output   
~15Mbps
Low supply current
Related Boards