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16bit MCU controls sensors for health care

Posted: 06 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:16bit microcontroller? controlling sensors healthcare?


Seiko Epson Corp. has developed the S1C17602, a low power consumption 16bit MCU that incorporates a newly developed 10bit ultralow power consumption ADC and is capable of controlling various sensors used in health care equipment.

The S1C17602 has an ultralow power consumption ADC with a running current consumption of 120?A (typical when the sampling clock is 2MHz), an RF converter with a 24bit counter for monitoring temperature and humidity, and various serial interfaces, which enable connection with sensors that are incorporated in healthcare equipment to monitor body temperature, blood pressure, body composition. The product also contains a segment LCD driver for displaying alphanumeric characters and icons. The S1C17602 is the first 16bit MCU produced by Epson with a segment LCD driver. This LCD driver is compatible with not only ordinary four common drivers (max of 160 dots) but also eight common drivers (max of 288 dots) enabling display support for increasingly higher resolutions and greatly enhancing expression.

Through the development of the S1C17 family of products, Epson has provided a lineup of 16bit MCUs that contain an LCD controller and a dot matrix LCD driver. The addition of these products containing a segment LCD driver enables the S1C17 family of products to support every type of LCD. Products equipped with LCDs are becoming much more diversified; to meet this, Epson has made it possible for its customers to develop all types of products, from low-end to high-end, by using the S1C17 family.

The S1C17602 built-in 10bit ADC achieves ultralow power consumption of 120?A (typical), which is one-third the running power consumption of conventional products from Epson (when the sampling clock is 2MHz). The device also contains an RF converter that is equipped with a 24bit counter and capable of easy and highly precise monitoring of temperature and humidity with only passive components. Additional features include contains I?C (master/slave) and SPI (master/slave), which are standard I/F for sensor modules. The built-in MAC unit and dividing unit in the device also enable high-speed sensor processing.

The device has an LCD driver that supports enhanced segment display to achieve enriched expression. It is compatible with the more enhanced eight common drivers (max of 288 dots) in addition to conventional four common drivers (max of 160 dots). The MCU software enables 16-value contrast adjustment. The built-in driver-dedicated power circuit enables the device to maintain a high quality display regardless of the charge remaining in the battery.

The S1C17602 achieves both the high processing capability of a 16bit MCU and the low power consumption equivalent to a 4bit or 8bit MCU. It also achieves ultralow power consumption of 5.5?A even when the LCD is in operation (32.768kHz in Run state, no panel load, Halt state). Proper adjustment of the CPU clock with the software achieves optimal power consumption; for example, a frequency division value set to 1/8 achieves an operating current that is one-third of the normal current.

The device is shipping in PTQFP14-100-pin plastic package (bare chip). Shipment of samples of this product began in May, with volume production scheduled to start in December.

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