SLVSCO4D July 2015 – February 2019 TPS65917-Q1
A power sequence is an automatic preprogrammed sequence the TPS65917-Q1 device configures its resources, which include the states of the SMPSs, LDOs, 32-kHz clock, and part of the GPIOs (REGEN signals). For a detailed description of the GPIOs signals, please refer to Section 5.9.
Figure 5-3 shows an example of an OFF2ACT transition followed by an ACT2OFF transition. The sequence is triggered through PWRON pin and the resources controlled (for this example) are: SMPS3 (VIO), LDO1, SMPS2, LDO2, REGEN1, LDO5, and LDO3. The time between each resource enable and disable (TinstX) is also part of the preprogrammed sequence definition.
When a resource is not assigned to any power sequence, it remains in off mode. The user (through software) can enable and configure this resource independently when the power sequence completes.
As the power sequences of the TPS65917-Q1 device are defined according to the processor requirements, the total time for the completion of the power sequence will vary across various system definitions.