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Real-time, Cost-sensitive Power Control with XMC1400 MCUs

Published: Mar 02,2016

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The XMC1400 microcontrollers will open up new applications for Infineon Technologies AG in industrial automation, digital power conversion, and electronic control.

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In comparison with the earlier XMC1000 products, the new XMC1400 series offers greater control performance and additional connectivity. The XMC1400 uses the 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.

XMC1400 products offer more connectivity than the earlier XMC1000 microcontrollers, as well as more processing power and therefore more accuracy of control. They have a 48MHz clock cycle. The XMC1000 series runs at 32MHz. In the XMC1400, significant elements of the controller peripherals such as PWM timers and AD converters can also be operated at double frequency – that is, at 96MHz.

Unique among Cortex M0-based products, the XMC1400 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 powerful microcontrollers of the XMC1400 series 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 price-sensitive future market of small combustion engines. For the control of electric motors, the XMC1400 offers two interfaces for the connection of Hall sensors or optical encoders.

The XMC1400 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 XMC1400 has up to four comparators for the regulation of switching power supplies. The earlier XMC1000 microcontrollers have at most three.

Just as for the XMC1000 microcontrollers, 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.

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