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Event Management Through Interrupts
4
Event Management Through Interrupts
4.1
INT_STS_REG.VMBHI_IT
The INT_STS_REG.VMBHI_IT bit indicates that the supply (VBAT) is connected (leaving the BACKUP or
NO SUPPLY state), the system must be initialized. (See
Section 3
, First Initialization.)
4.2
INT_STS_REG.PWRON_IT
INT_STS_REG.PWRON_IT is triggered when the PWRON button is pressed. If device is in the OFF or
SLEEP state, this acts as a wake-up event and resources are reinitialized.
4.3
INT_STS_REG.PWRON_LP_IT
INT_STS_REG.PWRON_LP_IT is the PWRON long-press interrupt. This interrupt is generated when the
PWRON button is pressed for 6 seconds. The application processor can make a decision to acknowledge
the interrupt. If this interrupt is not acknowledged in the next 2 seconds then the device interprets this as a
power-down event.
4.4
INT_STS_REG.HOTDIE_IT
INT_STS_REG.HOTDIE_IT indicates that the temperature of die is reaching the maximum limit. Software
must take action to decrease the power consumption before automatic shutdown.
4.5
INT_STS_REG.VMBDCH_IT
INT_STS_REG.VMBDCH_IT indicates that the input supply is low and the processor must prepare a
shutdown to prevent losing data. This interrupt is linked to VBAT but does not apply to a system where the
PMIC is connect to 5-V rails and not directly to VBAT.
4.6
INT_STS2_REG.GPIO_R/F_IT
INT_STS2_REG.GPIO_R/F_IT is the GPIO interrupt event and can be used to wake up the device from
SLEEP state. This can be an interrupt coming from any peripheral device or alike. This wake-up event is
not valid for transitions from the OFF state.
4.7
INT_STS_REG. RTC_ALARM_IT
INT_STS_REG. RTC_ALARM_IT is triggered when the RTC alarm set time is reached.
11
SWCU093C – August 2011 – Revised May 2013
TPS65910Ax User's Guide For AM335x Processors
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