Dual-core MCU for secure energy calculation, sensing & comms

August 19, 2014 // By Graham Prophet
Toshiba’s TX04 series of ARM Cortex-M4F core-based microcontrollers has been added to with the TMPM411F20XBG, an MCU for electric power calculation and communication in smart meters, as well as sensing and communications in other measurement devices.

A typical smart meter comprises separate controllers for electric power calculation, data communication, and output display. The TMPM411F20XBG achieves independent control of the electric power calculation and communication control in a single chip, reducing the circuit board area within the smart meter.

The TMPM411F20XBG implements tamper detection and failure detection with very low power consumption, and also incorporates key security functions suitable for secure network communication. These include Advanced Encryption Standard (AES), Secure Hash Algorithm (SHA) and Entropy Source Generator (ESG). Its large on-chip Flash memory allows for code and data storage as required for extensive service lifetime.

It operates at 2.7 to 3.6V, with a maximum operating frequency of 80 MHz. It has an internal memory of 2048 kBytes flash and 290 kBytes total SRAM, 34-channel direct memory access (DMA), and a 9-channel 12-bit analogue-to-digital converter (ADC). The product is housed in a 14 x 14 mm VFGBA193 package.

Toshiba Electronics Europe; www.toshiba-components.com