Circuit/System Description

The compass information is displayed in the driver information center (DIC). The electronic compass module interfaces with the DIC via the compass data signal circuit and the compass clock signal circuit. The two circuits function as a dedicated serial data communication link between the electronic compass module and the DIC. The communication link is a two-wire bi-directional link between the DIC and the electronic compass module only. The DIC controls the compass clock signal circuit used for reading and writing data. The compass data signal circuit is used to transmit data between the DIC and the electronic compass module. The electronic compass module internal fault detection is handled by the DIC and if the DIC does not receive a valid compass information from the electronic compass module, the DIC blanks the compass display.