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Embedded World 2016

MCU for real-time power control

With the XMC1400 micro-controller, Infineon’s XMC1000 family has been extended. The micro-controller opens up new applications in industrial automation, digital power conversion, and electronic control.

The micro-controllers offer greater control performance and additional connectivity than their predecessor (Photo: Infineon)

In comparison with the earlier XMC1000 products, the XMC1400 series offers greater control performance and additional connectivity. It uses an ARM Cortex-M0 processor and provides comprehensive peripheral functionality tailored carefully to their target applications. These include actuators in industrial automation, digital power conversion for the control of LED lamps and multiphase electric motors, and the electronic control of small combustion engines such as those in lawnmowers, chainsaws, or generators.

More connectivity for automation technology

In any application requiring networking of numerous sensors and actuators, the MCU provides not only real-time control performance, but also the necessary interfaces. All XMC1400 models offer communications interfaces like UART, I2C, SPI, and I2S. The XMC1403 and XMC1404 micro-controllers also have the ability to connect participants of two CAN networks.

Infineon also offers customer-specific versions of the XMC1400 in which secure bootloaders and an appropriate toolchain can load firmware securely into the Flash memory in encrypted form.

XMC1400 products offer more connectivity than the earlier micro-controllers (MCU), as well as more processing power and therefore more accuracy of control. They have a 48-MHz clock cycle. The XMC1000 series runs at 32-MHz but in the XMC1400, elements of the controller peripherals such as PWM timers and AD converters can also be operated at double frequency – that is, at 96 MHz. The micro-controller is also capable of carrying out trigonometric calculations and division in real-time. An integrated MATH co-processor working in parallel with the Cortex-M0 CPU is responsible for the additional real-time operations.

The MCUs have four CCU timer modules (two CCU4 and two CCU8 modules) and therefore up to 16 independent timers, for example for PWM generation in real-time. That allows them to meet the special requirements for electronic regulation and control of ignition, throttle, and injection pumps in the market of small combustion engines. For the control of electric motors, the MCU offers two interfaces for the connection of Hall sensors or optical encoders.

The MCU also has a BCCU peripheral unit (brightness and color control unit) for flicker-free digital dimming and color control of LEDs. That allows the design of multi-channel LED switched-mode power supplies that can regulate colored LEDs to simulate the spectrum of sunlight (tunable white). The MCU has up to four comparators for the regulation of switching power supplies. The earlier XMC1000 micro-controllers have at most three.

Infineon (Germany) shows its XMC developments at the Embedded World 2016 in Nuremberg, from February 24 to 25.