Abstract: A variety of applications do not require a high data throughput. The standardization of the interface in the field of smart cards fixes the processing width at 1 bit. Therefore, it is effective to use a programmable structure which operates with a data width of one bit. A data processing arrangement in the form of a 1-chip implementation with a processing width of 1 bit can be used in chip cards for simple control and automation functions while utilizing serial protocols. This structure features uncomplicated circuitry, a small chip surface area, a wide field of application and a low power consumption.