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There are four startup scenarios that requires synchronization between the Host and Module:

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First Time Startup Configuration First Time Startup Configuration

 Figure 1: First Time Startup Configuration Sequence

Figure (2) illustrates the sequence when the Module initializes before the Host (described in scenario (2)). In this scenario the Module starts sending Startup Sync Request periodically(every 5 seconds) to ensure that the Host receives the message even if the Host starts up slower than the Module. You can see in the figure, the Host Startup Ready command is sent after the Startup Sync Request. The Module is required to send a final Startup Sync Request after receiving the Host Startup Ready command. The Host can now start the Configuration sequence.

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Subsequent Startup Sequence Subsequent Startup Sequence

Figure  Figure 3:Subsequent Startup Configuration Sequence

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