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Renesas MCUs kill external memory for healthcare apps

Posted: 03 Mar 2011 ?? ?Print Version ?Bookmark and Share

Keywords:MCUs? low-power? portable?

Renesas Electronics Corp. adds eight new 32-bit V850 MCUs to the existing J Series. The V850ES/Jx3-L MCUs are an extension of the company's low power V850ES/Jx3-L 32-bit line introduced in 2010 for low power, portable applications with high density memory from 768KB flash/80KB RAM to 1MB flash/80KB RAM. Four of the new MCUs are equipped with USB 2.0 function interface to support communication.

The MCUs target smart meters, health care equipment and other portable apps. Featuring 1MB flash and 80KB RAM memory, they are suitable for smart meters that are subject to a regulatory power budget. Yet with more communication radios and more complex software, every component, including the MCU, has to be lower power to keep the system under budget. The increasing communication software can be adequately supported by the larger flash memory.

Renesas' 32-bit V850 MCUs

Health care systems, especially portable measurement and monitor devices, such as blood glucose meters, can take advantage of the low power to extend battery life and use the large flash memory for data storage. USB support enables these health care systems to support patient-doctor information exchange, such as the Continua Alliance standard. Moreover, the 32-bit processing power can support graphic computation for different displays, from segmented LCD to dot matrix and OLED.

Software complexity continues to increase in many applications. Product designers are faced with a difficult design decision between extending design cycle to reduce software size or paying for extra external memory to shorten design time. The high density Flash eliminates this design dilemma. These V850 MCUs with up to 1MB Flash can support several applications without resorting to external memory.

Renesas Electronics' V850ES/JG3-L MCUs address these needs, and even in the J Series, these new products reduce the normal operating current by 50 percent from the company's existing products, achieving low power consumption while providing large internal memory capacities.

The MCUs offer high-speed processing at 0.9mW per 1MIPS power consumption at 20MHz operation. They achieve 0.7?A current consumption in standby mode even with a real-time counter operating. And since they support 2V low-voltage operations when operating at 2.5MHz, they can contribute to longer battery operating times in portable information terminals and other battery operated electronic equipment.

The devices also offer easy reuse of existing software assets from other J Series devices.

Samples of Renesas Electronics' V850ES/JG3-L MCUs are available now. The sample prices of these products vary depending on memory capacity and package type.

For example, the MCU equipped in a 100-pin LQFP package with 1MB of flash memory is priced at $7.65 per unit. Mass production is scheduled to begin in July 2011 and is expected to reach a combined volume of 3,000,000 units per month with all eight products by FY2012.

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