Digital and bidirectional data transmission arrangement e.g. for private motor vehicle electric windows - uses bidirectional single-wire interface between transceiver units, interface being provided with third signal level to enable data interruption without requiring extra control line

摘要

A data transmission arrangement for digital and bidirectional data transmission between first- (FH) and second- (TSG) transceiver units, where these units (FH,TSG) are inter- joined via a digital, bidirectional single-wire interface to a single signal line (2). The single-wire interface has, in addition to two binary signal levels for the data transmission, a third signal level in order that the data transmission can be interrupted without an additional control line and/or the direction of data transfer can be reversed. Both binary signal levels are specifically recessive and the additional, third signal level is dominant.