Method for operating an active input element and corresponding input element, input arrangement and computer program product

A method for operating an active input element of an input arrangement wherein the active input element comprises a clock counter, a shift register, and a data processing unit, and wherein the method is carried out by the data processing unit and comprises the steps:

• a) set value of clock counter to 0;
• b) increase value of clock counter by 1 and shift data in the shift register by one bit, when detecting a clock information;
• c) compare value of the clock counter with a cycle length CLL, and return to step b) if comparison result is negative or proceed to step d) if comparison result is positive;
• d) read data from the shift register;
• e) compare said read data from the shift register with predetermined first data value, and
• proceed to step if comparison result is positive or proceed to step a) or g) if comparison result is negative;
• f) write data derived from analog input device into shift register and return to step a),
• g) compare said read data from shift register with predetermined second data value, and
• proceed to step h) if comparison result is positive or proceed to step a) if comparison result is negative;
• h) read data from shift register for next following v read cycles, wherein v=1 to 5;
• i) evaluate said read data and control input element according to said read data.