SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The DeepSleep oscillator circuit is used to control the main oscillator by disabling it during deep sleep and enabling during active/wakeup. By default, during reset, the oscillator is enabled and the oscillator control circuit comes up disabled (in-active). In order to activate the oscillator control circuit for DeepSleep, a register must be programmed. Once this is set and whenever the Device Manager enters DeepSleep, the oscillator control will disable the oscillator causing the clock to be shut OFF. Any event from the wakeup sources will cause the oscillator control to re-enable the oscillator after a programmed period in a register.
The Device Manager will always be powered up. But when the main oscillator is in power down / OFF state, the Device Manager will not receive any clock.