Toshiba TMPM411F20XBG one-chip microcontroller for smart meters

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.

The device has a maximum operation frequency of 80 MHz and a standby current of 1 µA or less. RTC operation, interrupt/tamper detection and data backup can be operated in standby mode.