SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
To enter extended duration sleep mode, the system host first signals the EVE subsystem (through systemlevel mailbox and interrupt) that it is entering this mode. In parallel, the PRCM asserts an SIdleReq request to the EVE subsystem. ARP32 performs any software book-keeping necessary to transition the EVE subsystem to a quiescent state. This can include:
If the EVE_SYSCONFIG[5:4] STANDBYMODE bit field is set accordingly, then the EVE hardware transitions to IDLE state and signals the desire to enter powerdown state to the device through the STANDBY and Idle protocols. After handshakes are completed internal EVE clocks are gated.
Figure 8-20 depicts the extended duration sleep software/hardware sequence.