Asynchronous state machine for managing deep sleep state

A system comprising a power management integrated circuit (PMIC) and an asynchronous state machine (ASM) associated with a device, the ASM configured to wake up the device from a deep sleep state, the ASM further configured to:

• automatically detect a request to wake up the device based on either a change in a status of a power user-interface element associated with the device or upon a detection of an attachment of an external power source to the device;
• in response to the request to wake up the device, automatically initiate a wake-up sequence including turning on a battery pack associated with the device;
• automatically detect whether a power management function associated with the device is enabled and if the power management function is not enabled then enable the power management function;
• and
• automatically transfer control of a remaining portion of the wake-up sequence to the power management function and pass the status of the power user-interface element to the power management function if the detecting the request to wake up the device is based on the change in the state of the power user-interface element associated with the device.