16-bit MCUs target efficient motor control

Processors give 13 MIPS performance at 20 MHz and use only 1.8 mW/MIPS

Featuring integrated inverter control circuits said to provide best-of-class power efficiency for fine-tuned control of motors and heating elements, the 78K0R/Ix3 lineup of nineteen 16-bit MCUs target refrigerators, air conditioners, dishwashers, and magnetic induction cooking appliances. The chips have a 1.8-mW/MIPS power-consumption-to-performance ratio, oscillators capable of driving timers at rates up to 40 MHz, integrated hardware multiply and divide, and I2 C serial interfaces.

The MCUs allow fine-grained control of multiple types of three-phase motors and yield 13 MIPS at a clock speed of 20 MHz. They integrate all of the basic analog circuits needed for inverter control, including an op amp, comparators, and fast 10-bit A/D converters. Twelve timer units allow one channel of six-phase PWM output for the three-phase motors generally used in inverter control applications.

Memory configurations range from 16 to 64 Kbytes of flash and 1 to 3 Kbytes of RAM, and packages range from 30 to 64 pins. (78K0R/IE3 with 64 Kbytes of flash; $5 ea/sample qty—samples available now; prod qty December.)

NEC Electronics America , Santa Clara , CA
Information 800-366-9782
http://www.am.necel.com