ZHCSI09S June 2010 – August 2018 TPS65911
When none of the device SLEEP-disable conditions are met, a falling edge (default, or rising edge, depending on the programmed polarity) of this signal causes an ACTIVE-to-SLEEP state transition of the device. A rising edge (default, or falling edge, depending on the programmed polarity) causes a transition back to the ACTIVE state. This input signal is level-sensitive and no debouncing is applied.
While the device is in the SLEEP state, predefined resources are automatically set in their low-power mode or off. Resources can be kept in their active mode (full-load capability) by programming the SLEEP_KEEP_LDO_ON and the SLEEP_KEEP_RES_ON registers. These registers contain 1 bit per power resource. If the bit is set to 1, then that resource stays in active mode when the device is in the SLEEP state.
32KCLKOUT is also included in the SLEEP_KEEP_RES_ON register and the 32-kHz clock output is maintained in the SLEEP state if the corresponding mask bit is set.
The status (low or high) of GPO0, GPO6, GPO7, and GPO8 are also controlled by the SLEEP signal, to allow enabling and disabling of external resources during sleep.