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32bit MCUs integrate ADC, motion control

Posted: 24 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:LM3S301? LM3S310? LM3S315? LM3S316? microcontroller?

Luminary Micro announced the availability of its next four Stellaris family 32bit microcontrollers (MCUs). The LM3S301, LM3S310, LM3S315 and LM3S316 are available immediately and offer features such as an ADC and a motion control unit, as well as on-chip memories.

Stellaris MCUs are based on the ARM Cortex-M3 processor. The Cortex-M3 processor aims to bring 32bits to the 8/16bit MCU space. The devices feature a 10bit successive approximation ADC that handles both single-ended and fully differential analog inputs at a maximum sample rate of 250KSps. The ADC can be triggered by software, timers, analog comparators, pulse-width modulation (PWM) or GPIO. In addition, the ADC contains four user-programmed sequencers that control the order and sample quantity of ADC channel sampling.

All MCUs also include PWM waveform generators suitable for sophisticated motion control applications. Up to three dual-channel waveform generators, each with dedicated timing hardware, facilitate the synthesis of PWM signals. These generators may be used in synchronous modes to control a single complex motor or independently to control multiple simple motors. The motion control unit also includes a deadband generator with independent rising and falling edge delays, used to create the programmable deadband delays required for driving a half-H bridge to some motors. These and other features allow for algorithms necessary for applications such as industrial digital controllers or brushless DC or AC induction motors.

The MCUs also feature: 16Kbytes single-cycle flash internal memory; general-purpose timers, with one available as real-time clock capability; watchdog timer; synchronous serial interface; on-chip linear drop-out voltage regulator with programmable output user-adjustable from 2.25V to 2.75V; and on-chip temperature sensor

All parts are packaged in 48-pin RoHS-compliant LQFP in commercial and industrial operating temperatures. Pricing for the new parts are as follows: LM3S301 is at $ 2.53, LM3S310 is worth $3.84, LM3S315 is at $4.37 and the LM3S316 costs $4.62. All prices are for quantities of 10,000.

Development kits are $775 each, and new development kits are available for the LM3S301 (DK-LM3S301), the LM3S310 (DK-LM3S310), and the LM3S315 and LM3S316 (both devices use DK-LM3S316 as the development kit). Daughterboard-only kits are available for the LM3S101 (DB-LM3S101), the LM3S102 (DB-LM3S102), LM3S301 (DB-LM3S301), LM3S310 (DB-LM3S310), and the LM3S315 and LM3S316 (both devices use DB-LM3S316 as the daughterboard). The daughterboard kits retail for $190.

Alpha customers are currently designing in all available Luminary Micro products, including the four announced. Full development kits, including applications software and evaluation versions of popular software tools, are currently available. Small-quantity orders of silicon are also available now with volume production in Q306.

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