32bit MCU replaces components
16 September 2008
Piccolo, the code name for the latest 32bit MCU from Texas Instruments, has just been launched.
Officially called the TMS320F280xx, and part of the C28x family, the new range of MCUs feature CLA (control law accelerator) for a claimed x5 performance boost.
This is designed to offload control algorithms from the main CPU, as well as enhanced peripherals like 150picosecond PWMs (pulse width modulators). The CLA is designed to run complex high speed control algorithms and free the main CPU to handle I/O and feedback loop metrics, resulting in up to a x5 performance increase for common closed loop applications. TI’s ePWM (enhanced pulse width modulators) support the industry’s highest resolution with frequency modulation down to 150picoseconds to enable more control over harmonics and reduce sample-to-output delay. Two on-chip oscillators operating at 10MHz each with +/- 1 per cent accuracy eliminate the need for external oscillators and their associated cost.
Architectural advancements and enhanced peripherals mean that package sizes start at 38-pins to bring the benefits of 32bit real time control to applications typically unable to justify the associated cost. Real time control claims to offer greater system efficiency and precision through the implementation of advanced algorithms for applications such as hybrid batteries for vehicles, white goods appliances, and LED lighting.
F280xx MCUs also include integrated oscillators with triple redundancy, combined with on-chip self-test features to help designers achieve system-level safety certifications such as the IEC 60730 safety standard required for white goods in Europe. The power architecture eliminates the need for external power ICs and uses a single 3.3V supply. According to TI, ‘Piccolo’ controllers can replace multiple electronic components to lower overall system cost while enabling advanced power electronics management.
Initial F280xx devices will include 40MHz to 60MHz variations, up to 128KB of flash memory, 12bit ADC and ePWM, as well as industry standard peripherals including communication protocols, on-chip oscillators, analogue comparators, and general purpose I/Os. Future devices will combine higher performance and memory sizes along with the CLA, LIN and CAN communications peripherals. In addition, F280xx devices are compatible with earlier-generation C2000 devices.
The first F2802x devices will be available for sampling in December. Future Piccolo-based devices are scheduled for the coming months.
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