prcm-019
Device
Generic power
domain
Reset domain 1
reset 1
reset 2
reset n
Reset domain 2
Reset domain n
PRCM
PRM
Reset manager
Public Version
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PRCM Functional Description
3.5
PRCM Functional Description
3.5.1 PRCM Reset Manager Functional Description
3.5.1.1
Overview
The PRCM module manages the reset of all modules in the device. Resets are distributed across the 18
independent power domains (including DPLLs and SmartReflex modules).
In each power domain, one or more reset domains are defined. A reset domain is defined by a unique
reset signal that originates from the reset manager and is connected to one or more modules of the
device. All the connected modules of the reset domain are reset simultaneously when the reset signal is
asserted. Independent control of these reset domains allows sequencing the release of resets and
ensures a safe reset of the entire power domain.
is an overview of the reset manager interface with a generic power domain in the device.
Figure 3-20. Reset Manager Interface With Generic Power Domain
Resets can be generated by hardware sources or software control. For a module that can be reset by
software control, a software-reset bit is implemented in its <module name>_SYSCONFIG configuration
register. Software reset has the same effect on the module logic as a hardware reset.
Special reset control is available to reset specific reset domains when the device operates under
emulation control.
NOTE:
All reset assertion is asynchronous, and all reset signals are active low, except for the DPLL
reset signals, which are active high.
3.5.1.2
General Characteristics of Reset Signals
Reset signals can be categorized based on three criteria:
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SWPU177N – December 2009 – Revised November 2010
Power, Reset, and Clock Management
Copyright © 2009–2010, Texas Instruments Incorporated