Fujitsu Launches SoCs For Power-Line Communication

Fujitsu Microelectronics Europe (FME) has introduced two system-on-chip (SoC) solutions for FSK-based power-line communication (PLC). The MB87S2090 and the MB87S2090-F have been developed in association with ADD Semiconductor, a developer of SoCs for communication over power line and solutions for automatic meter management. Both devices are pin-to-pin compatible with ADD Semiconductor's designs. The MB87S2090 is a PLC SoC that implements a full PLC node using A-, B- and C-band FSK modulations.

It is also IEC61334-5-2 compatible and includes an enhanced 8051 microcontroller, a media access controller (MAC) and a modem circuit. A complete set of peripherals has been developed achieving a high level of versatility and providing a compact, low-cost solution for automated meter reading/automated meter management (AMR/AMM) applications using narrowband PLC, according to the company. Based on the MB87S2090, a single-phase smart meter can be realised without the need for additional microcontrollers.

It includes an LCD driver as well as a range of serial communication interfaces to connect to a metering front-end device as well as to the outside. The device also includes several timer-based peripherals and GPIO pins that can be used to control/switch the power line (AMM). For modular metering devices, the MB87S2090 can assume the complete PLC role and act as a PLC module, communicating with the measurement device via its serial interfaces. The MB87S2090-F is a PLC SoC that implements a full PLC node using FSK C-band modulation.

It is compliant to EHS and Konnex standards for building automation as well as IEC61334-4-32. The device has been designed to target and simplify power-line-based building automation, safety, security and control applications as well as energy-saving applications such as intelligent street lighting or solar-panel management.

As with the MB87S2090, the MB87S2090-F integrates an enhanced 8051 microcontroller, a hardwired MAC and a Cenelec FSK modem on one chip. As the MAC is hard wired, the integrated central-processing unit can be used to perform application tasks. The many on-chip peripherals support these tasks. Five serial communication interfaces (three UARTS, two SPI) secure communication to the outside, while integrated pulse-width-modulation timers can be used to switch or dim lights or manage other loads.

The device only needs a simple coupling circuit and reduces the number of components required for a PLC application, making the employment of PLC as a control network affordable for a wider range of applications. By integrating the MCU, MAC and modem into single-chip devices and shifting the front-end filtering into digital filters, FME's new PLC solutions not only reduce the number of components needed for line coupling but also improve the sensitivity with better noise suppression compared to analogue transceivers, according to the company. The effect is more stable communication, even in harsh conditions.


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