7.7.5 PRIME: Read TX confirm Information (Buffer 0)

When message transmission is complete, the PL360 device reports the status of the last transmission. For that purpose, IRQ is used to notify the PL360 Host Controller that an event has occurred.

Figure 7-14. PRIME TX Confirm Information SPI Sequence

In the figure above, the following can be seen:

  • IRQ is used to notify of PL360 events
  • First SPI transaction corresponds to the retrieval of event information from the PL360 device
  • Second SPI transaction corresponds to the retrieval of confirmation data from the PL360 device (if needed)