TI's new C2000 32-bit Piccolo F2805x MCUs boast 5x performance

November 26, 2012

Toni_McConnel-November 26, 2012

Texas Instruments Incorporated's new highly integrated C2000 Piccolo F2805x microcontrollers are optimized for a variety of three-phase inverter motor control applications to enhance power efficiency and control performance of electric pumps, fans, traction drives, textile machines and more.

The new Piccolo F2805x microcontrollers pack a number of analog components on chip to increase system efficiency and decrease the number of discrete parts. Piccolo F2805x microcontrollers offer the intelligence and performance of the TMS320C28x digital signal processing (DSP) core with a C-programmable Control Law Accelerator (CLA) co-processor on-chip. The CLA is a 32-bit floating-point math accelerator, designed to work independently of the CPU core to offload time-sensitive control algorithms or DSP processing, freeing the CPU to handle motion profiles, system management, communications and safety checking, resulting in up to a 5x increase in performance for closed loop applications.

Features:

  • C28x CPU running at 60 MHz with C-programmable, 32-bit floating-point CLA co-processor running at 60 MHz ease programming, improve flexibility and enable direct access to on-chip peripherals for parallel execution of algorithms and control loops. The CLA enables faster system response, higher KHz control loops and improved triggering and fault detection.
  • Embedded memory for more storage, including up to 128 KB Flash and up to 20 KB SRAM. Boot ROM and dual 128-bit security key on protected zones for both Flash and ROM ensure code security for entire device or mixed-source software development.
  • On-chip communication interfaces, such as an SPI module, I2C bus, CAN 2.0 and 3 SCI/UART modules improve connectivity for real-time communications.
  • Integrated analog to improve system efficiency and reduce bill of materials cost (BOM):
  • 12-bit analog-to-digital converter (ADC) up to 2.3 MSPS for synchronous motor-phase readings – dual sample and hold.
  • 14 enhanced pulse-width-modulation (PWM) channels with fault management, providing motor control for multiple motors, as well as power conversion.
  • 7 windowed analog comparators with 10-bit digital-to-analog converters (DACs) provide individual current feedback for each motor phase, integrated fault protection and accurate, on-time feedback.
  • Dual, zero-pin oscillators increase system robustness by integrating the clock source on-chip and providing a second, backup oscillator for smooth recovery from clock failure conditions.
  • Voltage regulator decreases system complexity and costs, enabling a single voltage supply rail to power the microcontroller.
  • Up to 4 programmable gain amplifiers (PGAs) act as variable resistors to adjust incoming feedback waveforms prior to ADC conversion, eliminating the costs and reducing board area.
  • 32-bit enhanced input capture module (eCAP) and enhanced quadrature encoder pulse (eQEP) module for sensored motor control to accurately detect and capture position and speed of rotating motion systems.

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