Artikel der Woche: Pegelwandler

Pegelwandeln (engl. level shifting) wird oft notwendig, wenn Systeme mit unterschiedlicher Ausgangs- und Eingangsspannungen miteinander verbunden werden sollen. Das vielleicht bekannteste Beispiel ist die Umsetzung von 0V/5V TTL Logikpegeln auf die -12V/12V Pegel einer seriellen RS232-Schnittstelle.


Infineon XMC Design Contest 2014

Present your project with an Infineon XMC microcontroller (ARM Cortex-based) on, and win a 3D Printer or one of 9 Developer Kits by Infineon!


1st place: 3D Printer Kit PRotos v2 with many extras, worth €1200

PRotos v2
  • Printing area 23x23x12 cm
  • Carbon printing bed
  • Heated printing bed
  • Stand alone controller with LCD and SD card slot
  • 750g PLA filament

2nd-10th place: Infineon XMC4000 Kit (choose between Automation Kit or Motor Control Kit), worth €299

XMC4500 Automation Kit
  • XMC4500 CPU Board
  • Automation I/O Card
  • Human Machine Interface Card
  • Ethernet/CAN/RS485 Interface Card
  • JLink Lite Cortex-M Debugger
XMC4400 Motor Control Kit
  • XMC4400 CPU board
  • Motor interface board
  • BLDC motor Nanotec DB42S03

No XMC hardware?

Cheap evaluation boards are available at many distributors, including Mouser, Farnell, Digikey.

How to participate

  1. Create an account on
  2. Create an article with your project description (Instructions)
  3. Add “[[Category:Infineon_XMC_Design_Contest_2014]]” to the article text

Terms and Conditions

  • You have not published your project anywhere else.
  • Your project is based on a microcontroller from the XMC1000 or XMC4000 family.
  • The project description is complete.
  • Text and images are published with a Creative Commons license, source code with an open source licence.
  • The article is finished by July 20, 2014.
  • Prizes can be shipped within the EU, Switzerland and the USA. If you live anywhere else, please contact us to make sure delivery of prizes to your country is possible.


Evaluation is done by a jury consisting of moderators of the and forums and Infineon engineers. Criteria are originality of the project, realization, and presentation of the project in the article.


Please ask here.

There is also a topic on's German partner site


TI buys National Semiconductor

In a $6.5 billion deal, Texas Instruments acquires National Semiconductor, extending its Analog portfolio by 42,000 devices.

"More Information on the TI website.":


ARM announces Cortex-M4 processor core

<a href=""><img src="" style="float: right;" /></a>

ARM today announced a new member of the Cortex-M processor core family, the Cortex-M4. It is advertised as a "DSC (digital signal controller)", a hybrid between microcontroller and DSP (digital signal processor). In features the M-series' Thumb-2 instruction set, and DSP extensions like single-cycle MAC (multiply-accumulate), a hardware divider, and an optional single precision FPU (floating point unit). The target clock speed is 150 MHz.

From the available information it seems that the Cortex-M4 will be competing with "TI's C2000 family":, which includes devices at similar clock speeds and optional FPUs, and Microchip's slightly lower-end "dsPIC": Applications cited by ARM range from motor control to audio processing.

According to the press release, five semiconductor companies, including NXP, STMicroelectronics and Texas Instruments have already licensed the Cortex-M4.

More information:


Atmel announces ARM Cortex-M3 based Controllers

"Atmel": has "announced": a new controller family called "AT91SAM3U": based on the ARM Cortex-M3. If you have been following the development of the ARM market this was only a matter of time, since the big competitors NXP and TI (with its "recent aquisition": of Luminary) are already shipping Cortex-M3 based controllers. Unlike them however, Atmel seems to be targeting only the higher end of Cortex-M3 applications, which is also not too surprising considering their strong position in the 8 bit market with the "AVR": (and AVR XMEGA) family.


TI buys Luminary Micro

Texas Instruments just "announced": that they acquired Luminary Micro, vendor of the popular ARM Cortex M3-based Stellaris microcontroller series. A step that seems to make sense, since TI had fallen a bit behind in the general purpose, low end ARM controller market.


Articles on

An "article section": has been added on The first articles are "a general overview of ARM-based microcontrollers": (cores, development tools) and my "ARM MP3/AAC Player": project (previously published on "":

The articles are organized as a Wiki, that means anyone can edit and create articles. If you want to write an article about a project you would like to present or a topic that interests you, see "How to create a new article":

All articles are licensed under a "Creative Commons License":


New Luminary Stellaris microcontrollers (ARM Cortex-M3)

The new "Stellaris 9000 series": by "Luminary": is based on the ARM Cortex-M3 and offers up to 96 kB RAM and 100 MHz clock speed. New features include I2S (for audio CODECs) and an external peripheral interface that supports SDRAM and a host mode.


ARM announces Cortex-M0 processor core

<a href="/images/news/cortex-m0.png"><img src="/images/news/cortex-m0-small.png" align="right" /></a> ARM is intensifying its attack on the 8-bit controller market with a new ultra-low power processor core, the Cortex-M0. At claimed 0.85 µW/MHz the power efficiency is comparable to controllers of the AVR or MSP430 families. The Cortex-M0 implements the Thumb-1 and a subset of the Thumb-2 instruction set, so the same level of support by open source tools can be expected as for the other ARM cores.

NXP, best known for its ARM7-based controller family LPC2000, has announced to become the first licensee for the Cortex-M0, though no specific products have been announced yet.

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