TOKYO — (BUSINESS WIRE) — March 11, 2015 — Toshiba Corporation (TOKYO:6502) today announced the launch of a new microcontroller, “TMPM311CHDUG”, as the latest addition to its ARM® Cortex®-M3-based TX03 series. The microcontroller is designed for smart meter applications. Sample shipments will start in April, with mass production scheduled to start in September, 2015.
Toshiba: ARM(R) Cortex(R)-M3-based microcontroller "TMPM311CHDUG" for smart meters. (Photo: Business Wire)
A power measurement analog front-end (AFE) for single-phase and three-phase smart meters requires simultaneous high-precision current measurement, voltage measurement and power calculation. A 24-bit delta-sigma(∆Σ)-type AD converter incorporated in the new product enables high-precision current measurement, voltage measurement and power calculation at the same time. This ensures the realization of high-end smart meters.
Key Features of New Products
-Built-in four-channel 24-bit ΔΣ-type AD converter: Measures current and voltage simultaneously, with high precision. The allowance for measurement error of single-phase power calculation is within 0.1 %.
-Three-phase power meter solution: Simultaneous current and voltage measurement for up to eight channels is supported by using two units of the microcontroller in an interlocking manner.
-Built-in low-noise variable gain amplifier in each conversion channel of the 24-bit ΔΣ-type AD converter: Enables high-precision measurement for current from a current sensor. This supports both power calculation meter and various sensor equipment.
-Built-in temperature sensor: Enables various temperature corrections.
-In combination with “TMPM411F20”, which incorporates two Cortex-M4F cores and performs measurement and communication controls on one chip, and enables tamper detection in the power failure and interrupt detection for measurement and communications at super-low power consumption, “TMPM311CHDUG” can realize a smart meter system that integrates measurement and communication on a board.
|Sample price (tax included)||300 yen|
|Internal memory||SRAM 21 Kbytes|
|Operating voltage||2.7 to 3.6 V|
|24-bit ∆Σ AD converter||
• Built-in variable gain amplifier for each channel
Variable gain: x1, x2, x4, x8, x16
• 1 channel is also used as an input of the internal temperature sensor.
|μDMA controller||1 unit|
|16-bit timer||5 ch|
|Interrupt input||2 ch|
|Temperature sensor||1 ch|
|Package||LQFP48 (7mm x 7mm, 0.5mm pitch)|
DMA: Direct Memory Access
1 Kbyte is calculated as 1024 bytes.