GF82.00-P-2001T Wake-Up Function

GF82.00-P-2001T Wake-Up Function

Since the transmitting and receiving diodes are automatically shut off if they are not needed (sleep mode), a command from the radio control panel and navigation unit (A2/56) or a wake-up pulse, which activates the system, is required to start a new data transfer
This is accomplished via the separate wake-up line. For this purpose the audio gateway control unit (N93/1) actuates a wake- up signal (electrical signal), which allows the voltage in the wakeup line to decrease to a defined value. A chip in the components recognizes by the duration of the signal that it is a wake-up signal and the MOST is activated.
A wake-up can be activated for instance by the telephone system through an incoming telephone call during the run-on phase.

Diagnose Wake-up
In order to diagnose the wake-up circuit in the components the audio gateway control unit (N93/1) can be prompted via STAR DIAGNOSIS to actuate a wake-up diagnosis signal. This signal differs from the wake-up signal by the fact that it has a significantly longer duration. The components react with a signal on the wake-up line (message to the audio gateway control unit (N93/1)).

This allows the audio gateway control unit (N93/1) to recognize, which components received the long wake-up pulse. The diagnostic wake-up can only be actuated when the optical ring cannot be activated due to an error. If all components answer the audio gateway control module (N93/1), the voltage supply is correct.