Toshiba has announced a one-chip microcontroller for smart meters, the TMPM411F20XBG, as the latest addition to its TX04 series ARM Cortex-M4F core-based microcontrollers. The device is also suitable for devices with sensing and communication functions (Internet of Things). A typical smart meter controller consists of an electricity calculation unit that measures current and voltage; a communication control unit that transmits and receives data with external equipment; and a display unit that outputs information to the display. The product features two independent bus-matrices for the measurement unit and communication unit. The device incorporates two Cortex-M4F cores to enable independent control of the measurement and communication units on one chip and reduce board space. In addition, security functions required for network communications -AES, SHA and ESG - are implemented. Tamper detection and interrupt detection at power failure are also implemented with low consumption power.
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