SPRUGZ8D Datasheet, PDF (449/3016 Pages) Texas Instruments – Technical Reference Manual

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Power Reset Clock Management Structure
Table 2-13. PRCM Functional Interfaces (continued)
Interface
Description
Device control signals
Clocks control signals
Resets signals
This interface provides PRM management of several device-level features which are
not specific to any single power domain. This PRCM interface controls signals to/from
the device for global control:
• Device type coding
• I/Os isolation control
This interface gathers all clock inputs and outputs managed by PRCM modules.
This interface gathers all resets inputs and outputs managed by PRCM module.
Modules or subsystems in the device are split over two categories:
• Initiator: an initiator is a module able to generate traffic on the device
interconnects (typically: processors, MMU, eDMA...). The PRCM module handles
all initiator modules' power management interfaces: MStandby signal MWait
signal.
Modules Power Management Control
• Target: a target is a module that cannot generate traffic on the device
interconnects, but that can generate interrupts or DMA request to the system
(typically, peripherals). PRCM handles a power management handshake protocol
with each module or subsystem. This protocol allows performing proper clock and
power transition, taking into account each module activity or state. PRCM module
handles all target modules' power management interfaces: SIdleReq signal,
SIdleAck signal, FCLKEN signal. It also handles all target modules' wake-up:
SWakeup signal ⁽¹⁾.
(1) _{Only USB and PCIe support SWakeUp.}
SPRUGZ8D – 14 November 2011 – Revised April 2013
Power, Reset, and Clock Management (PRCM) Module 449
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