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16bit MCUs guarantee continuous operation

Posted: 27 Jan 2012     Print Version  Bookmark and Share

Keywords:16 bit MCUs  microcontrollers  electricity metering  energy monitoring 

Offering developers more flexibility in Texas Instruments Inc. rolls a family of ultra-low-power 16bit MCUs that target electricity metering and energy monitoring applications. The MSP430F673x/F672x MCUs guarantee no interruption of operation through a backup capable MCU supporting real-time clock (RTC) operation and power management from the main power supply and up to two separate auxiliary supplies.

The 24 new F673x/F672x devices also claim better measurements achieved by an increased sampling rate, and superior linearity over multiple operating conditions, such as current range and time, resulting in a stable system solution. These devices are TI's first that integrate 24bit sigma-deltas and a 320-segment LCD controller. Compared to previous 160-segment solutions, developers can leverage enhanced segmented LCDs with more programmability and enable more characters on displays, especially with Asian languages. As part of the MSP430 microcontroller portfolio, the F673x/F672x devices are designed for ultra-low-power modes, ensuring the LCD display is consuming as little power as possible during operation.

TI offers a free MSP430 Energy Library to support metrology software on the new F673x/F672x devices, making start-up easy for customers designing utility meter product. Developers can test and experience accuracy results with the MSP430F6736 EVM, a single-phase electricity meter as well as program and debug F673x/F672x devices with the MSP-TS430PZ100B target board and MSP-FET430U100B flash emulation tool.

The MSP430F673x /F672x family features 24bit sigma-delta with programmable gain amplifier and less than 0.1 per cent accuracy across a 2400:1 dynamic range that enables the F673x/F672x family to meet class 0.1m and exceed the IEC62053/ANSI C12.20 specifications.

Its sigma-delta converter offers independent channels for voltage, current and tamper detection, reducing energy measurement software development and security concerns. It has a 320-seg LCD driver that enables segment and blinking control and dual display memory, and it can run in 8-MUX mode to support multiple LCD devices. Its real-time clock and calendar mode operates from a separate voltage supply with programmable charger for accurate data logging and measurements with no loss of data.

The devices use 1.4µA in standby mode with ultra-fast wake up at less than 3µs.

Also, the MSP430 electricity metering selection tool makes it easy for developers to find the right product for their applications, while the free MSP430 Energy Library supports metrology software measurements, such as voltage, energy and tamper detection.

The MSP430F673x/F672x MCUs are available, starting at Rs.102.04 ($2) for 1K-units. The MSP-TS430PZ100B target board is available for Rs.3,826.53 ($75) and the MSP-FET430U100B flash emulation tool is available for Rs.7,602.04 ($149).

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