188.8.131.52.2. D3Hot Exit Initiated by EP
For the Endpoint to exit the D3hot state, the PME_en bit in the Power Management Control and Status register needs to be set first by the Host (prior to the D3hot entry). The Application Layer can then request a wake-up event by asserting apps_pm_xmt_pme_i, which causes the IP core to transmit a PM_PME message. In addition, the IP core sets the PME_status bit in the Power Management Control and Status register to notify software that it has requested the D3hot exit transition.
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