Apparatus and method for data transmission and to switch between different modes of operation of a transducer

Device for data transmission between a constructed as position measuring sensor (1; 21; 31) and a processing unit (2; 22; 32) over a plurality of signal transmission lines (3, 4; 23, 24; 33, 34) (with the transducer is 31), wherein the sensor (1; 1; 21 21; 31) is switchable between at least two different operating modes, of which a measuring mode and a programming mode, wherein in the measurement mode a of measuring data to the processing unit (2; 22; 32 ) is carried out and the programming mode, a read and write cycles of memory regions (6.1, 6.2, 6.3;. 26.1, 26.2, 26.3) of the transducer (1; 21; 31), wherein - on a first signal transmission line (4; 24; 34) transmission of signals to the processing unit takes place and (2; 32; 22) occurs and the serial transmission of data on the first signal (31 1; 21) on a second signal transmission line (3; 23; 33) - in the measurement mode a transmission of clock signals from the processing unit (2; 22; 32) to the transducer transmission line (4; ...