GF82.00-P-2000RA Data Transfer, Function

GF82.00-P-2000RA Data Transfer, Function

Data Transfer In MOST
The audio gateway control unit (N93/1) makes it possible to provide all the information on the interior CAN (CAN-B) to the respective components connected to the MOST ring . It acts as an interface (gateway). The unit converts the incoming signals in such a way that they can be transferred from the MOST ring to the interior CAN (CAN-B) and vice-versa. The electrical signals are converted into light pulses and back again by the optical transmit and receive diodes that are integrated into every MOST ring component.

The audio gateway control unit (N93/1) is the pulse generator that transmits blocks of information on the MOST ring. A block consists of 16 data frames. A data frame contains source data (voice, video, etc.) that are transmitted synchronously and control data (commands, etc.) that are transmitted asynchronously.

The sequence of many data frames then contains the complete information for the operation of the components connected to the MOST ring.

Data frames are transferred from one component to the next on the MOST ring. Each of them has an address (code) that specifies the MOST ring component for which the information is intended. Within the component the data frames are accepted by the receiver (RX), which checks the current address and, if this address does not coincide with the component address, the information is placed back onto the MOST ring and relayed to the next component.

Data frames that are read in by the component are assembled into information blocks and undergo further processing.
The transmit and receive units are switched to standby mode if they are not needed (no data frame) in order to reduce quiescent current consumption (sleep mode).
They are switched into operating mode by an optical wake-up signal.