John David Dombrowski

6907503, Jun 14, 2005

Sep 27, 2001

09/965490

Michael R Lindsay - Commerce Township MI, US
John R Dombrowski - Dearborn Heights MI, US
David R DeRain - Walled Lake MI, US
Alan R Ward - Troy MI, US
Mary Joyce - Farmington Hills MI, US
Michael D Hesse - Dearborn Heights MI, US
Madhu B Banerjee - Bloomfield Hills MI, US

DaimlerChrysler Corporation - Auburn Hills MI

G06F012/00

711149, 711156, 709213, 701115

An apparatus for determining the validity of a data signal communicated between two microprocessors by a dual port RAM includes a sender for providing a data signal and an initialization status indicator and a dual port RAM in communication with the sender for receiving the data signal and the initialization status indicator. The RAM has a first location for storing the data signal and a second location for storing the initialization status indicator. The sender performs initialization on the RAM at the beginning of a data transfer cycle which includes a plurality of data transfer from the sender to a receiver. The sender updates the initialization status indicator as the initialization progresses. The receiver reads the initialization status of the RAM from the second location and subsequently reads the data signal from the first location in association with the initialization status of the RAM.