The worldwide STANDARD for home and building control




KAIstack with Atmel® AVR® -
basis for your KNX-application

Embedded system designs that employ KAIstack and a microcontroller ATMEGA64, ATMEGA644, ATMEGA128 or ATMEGA128L of the Family of megaAVR® microcontollers from Atmel® gain access to the powerful, yet easy-to-use technology platform KAI (KNX Advanced Interface) for KNX enabled bus devices.
Ideal for applications requiring large amounts of code, the megaAVR offers substantial program and data memories with high performance. Innovative picoPower® technology minimizes power consumption. All megaAVRs offer self-programmability for fast, secure, cost-effective in-circuit upgrades. You can even upgrade the flash while running your application. 
KAIstack is the main software component of KAI and provides the complete functionality needed for KNX devices. KAIstack contains all elements required by the KNX standard and is certified in several different configurations. KAIstack is implemented in close dependence on the ISO/OSI reference model. The clear structure separates between application relevant parts, modular communication stack internal parts, media dependent parts and target CPU related issues. Advanced implementation methods allow highly efficient coding that leads to optimized resource usage. This is shown in a small footprint and moderate resources needed. An application development with KAIstack relieves the burden of early decisions in the design process by simple configurability of the stack. It helps increase system reliability and improves device stability. Hardware and software components of KAI can be adapted according to given conditions. KAIstack is KNX certified.

Evaluation board for KAIstack with Atmel® AVR®

The evaluation boards for KAIstack with ATMEGA64, ATMEGA644, ATMEGA128 or ATMEGA128L MCU provides everything necessary to develop efficient KNX devices. The introduction of “Media-modules” gives the possibility to change the communication media used, during product development or even later. For the supported media KNX-TP, KNX-RF and KNX-IP we offer several different modules per media:TP: TP-UART, TP-UART galvanic isolation ,TPUART2, E981.03, NCN5110, KAIphys RF: SX1211 others in preparation.
Pushbuttons, LEDs and all MCU signals routed on pin header with standardized connections to “Media-modules”, provide an excellent development and test platform.
Equipped with the state of the art software from TAPKO, your product success is on the tip of your hand.

. Rapid product prototyping
. Basic user interface keys and LEDs on board
. Additional application program traceability
. Full hardware flexibility
. Interchangeable Physical / Link Layer with Media-modules
. Support for different media


KNX 20 Jahre