SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The PMIC drives three external enable-output signals, which allows switching on some external resources at different stages of the power-up sequence:
The PMIC companion chip can receive two power resource requests: ENABLE1 and NSLEEP. These pins allow an external device to request PMIC internal resources. The PMIC companion power behavior when pins are activated must be programmed after the first boot (resources and ENABLE pins allocated by group, resource behavior upon group activation, and so forth).
The use of NSLEEP is especially required when PMIC chip is in sleep mode, because it cannot handle an I2C command. Any device that requires the PMIC companion resource to wake up must first activate its associated ENABLE signal. All power-management chip power regulators are off or in sleep mode when it is in sleep mode.