LAT System Initialization: A Beginning
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1.7. LSI Timing Diagram

The sequencing described in the previous sections is presented here as timing diagrams.

1.7.1. PCI Crate Initialization Timing Diagram

The sequencing of PCI module initialization during PCI crate initialization is shown below. Note the Actor SBC wait for the "LCB Ready IRQ" before accessing the LCB.

Figure 1-7. Timing of PCI module configuration during PCI crate initialization

1.7.2. Single Actor SBC Reboot Timing Diagram

The rebooting of a single Actor SBC is shown below in Figure 1-8. This covers the case when the PCI crate is previously configured, but one of the Actor SBC is rebooted. In this case the LCB is already configured when the Actor SBC reboots.

The Actor SBC determines the LCB is already configured by reading the Memory Access Enable bit of the PCI Configuration space Command register. In this case the Actor SBC can proceed to use the LCB without waiting.

Figure 1-8. Timing of Actor SBC rebooting

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