Texas Instruments OMAP36 Series, Technical Reference Manual

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PRCM Basic Programming Model
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• PM_WKST1_CORE and PM_WKST3_CORE : CORE domain modules wake-up event status
• PM_WKST_PER : Peripheral domain modules wake-up event status
• PM_WKST_WKUP : WKUP domain modules wake-up event status
• PM_WKST_USBHOST : HS USB Host subsystem wake-up control
The functional clock of the module causing the wakeup automatically restarts on the wakeup, but the
software must enable the functional clock (CM_FCLKEN_<domain_name> register) before clearing the
wake-up status bit.
NOTE:
• Software must clear this register before a new sleep transition request; otherwise, the
register prevents the sleep transition from occurring.
• If the PRM interrupt is enabled on a module wakeup, the PM_WKST_<domain_name>
must be cleared before clearing the PRM_IRQSTATUS_<processor_name> interrupt
status register.
3.6.2.5.3 PM_WKDEP_ <domain_name> (Wake-Up Dependency Register)
The wake-up dependency register allows the enabling/disabling of a wake-up dependency between power
domains. When a domain wakes up, it can wake up another domain.
The device has the following wake-up dependency registers:
• PM_WKDEP_MPU : MPU power domain wake-up dependency with the following domains:
– CORE
– IVA2
– WKUP
– DSS
– PER
• PM_WKDEP_DSS : DSS power domain wake-up dependency with the following domains:
– MPU
– IVA2
– WKUP
• PM_WKDEP_CAM : The CAM power domain has programmable wake-up dependency with the
following domains:
– MPU
– IVA2
– WKUP
• PM_WKDEP_PER : The PER power domain has programmable wake-up dependency with the
following domains:
– MPU
– IVA2
– WKUP
– CORE
The PER power domain can be wakened only by a wakeup of the L3 and D2D clock domains, not by
an L4 clock domain.
• PM_WKDEP_NEON : The NEON power domain has programmable wake-up dependency with the
following domain:
– MPU
• PM_WKDEP_IVA2 : The IVA2 power domain has programmable wake-up dependency with the
following domains:
– MPU
– PER
– WKUP
412 Power, Reset, and Clock Management SWPU177N – December 2009 – Revised November 2010
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