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Metering IC features embedded flash memory

Posted: 27 Apr 2007 ?? ?Print Version ?Bookmark and Share

Keywords:metering IC? embedded flash memory? LCD meters?

Analog chip vendor austriamicrosystems is getting ready to sample the AS8268, a single-phase SoC metering IC with embedded flash memory.

Intended for LCD meters, the AS8268 integrated SoC provides secure program and data through its on-chip flash memory. The AS8268 also fulfills all utility anti-tamper requirements and can be designed into custom LCD displays. Meter implementations based on the AS8268 require a minimum of external components, inherently improving meter reliability and reduced meter system cost. The AS8268 incorporates all the required functional blocks for single-phase metering, including a precision energy measurement front-end, an 8bit MCU, 32Kbytes of on-chip flash memory, a real-time clock, 96-segment LCD driver, 12 programmable multipurpose I/Os for all possible customer-specified interfaces and display requirements, as well as an on-chip temperature sensor.

The AS8268 offers the option of using an external EEPROM of 2Kbytes to 32Kbytes for data retention, in conjunction with the fully programmable industry standard 8bit 8051 compatible MCU and 32Kbytes on-chip flash memory. Two UARTs provide for external communication.

A programmable energy LED pulse output can be displayed through one of the multipurpose I/Os. This precision output along with an on-chip pulse counter allows for the option of fast automatic digital calibration. An on-chip 1.4ppm real-time clock/calendar (RTC) with two alarm registers and battery back-up is available for complex tariff applications, with the option of added precision through the on-chip temperature sensor.

Active energy, MAINS voltage and MAINS current is calculated directly within the on-chip DSP. Reactive power and apparent power can also be calculated by user configurable application software.

The AS8268 is available in a LQFP-64 pin package and is pin-compatible with the currently available AS8218 and AS8228.

Samples of the AS8268 will be available later in Q2 2007.

- Ismini Scouras

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