Electronic Design

DSC Lets Coprocessor Handle Real-Time Analog

Texas Instruments’ C2000 digital signal controller (DSC) gets a major boost with the Control Law Accelerator (CLA). This 32-bit floating-point controller speeds up the processing, often by a factor of five, of analog chores such as motor control and power-supply management. It executes programs stored in shared SRAM, up to 64 kbytes.

The main 60-MHz C28x core has its own SRAM, flash, and boot ROM. It also has access to the full peripheral complement, while the CLA is limited to the 16-channel, 12-bit, 4.6-Msample/s analog-to-digital converter (ADC) and the enhanced pulse-width modulation (ePWM) module. This is sufficient for a range of control applications. The ePWM has further refinements that provide finer timing and frequency control.

The CLA offers the usual complement of C2000 peripherals, including SPI, I2C, SCI, CAN, and LIN interfaces. There is also an enhanced quadrature encoder pulse (eQEP) and enhanced capture (eCAP) modules. Pricing for the TMS320F2802x/F2803x starts under $2.

Texas Intruments • www.ti.com

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