The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2001
Filed:
Sep. 23, 1998
Martin Daiber, Ostfildern-Ruit, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method of initializing a control unit connected to a diagnostic bus by a trigger word using signals on the diagnostic bus over the RXD line of a microcontroller having a port register and a receive buffer register. According to this method, information is sampled from the port register for the low/high logic state with a predetermined sampling cycle to detect the trigger word, and a readout of the receive buffer register and an analysis of the status information are performed. To prevent unintentional initialization or triggering of the control unit, a check at the sampling time during input of the trigger word is performed to determine whether the receive buffer register is full or whether there is a transition from the high logic signal level to the low logic signal level on the K line of the diagnostic bus, in which case a trigger word causes a framing error in this test. Further, an initialization of the control unit is accepted if there is a framing error; otherwise, the initialization is discarded and another transition from, for example, a high logic signal level to a low logic signal level is waited for.