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Power System Overview
2.2
Clock Domain
70
Power Management
OMAP5912 can be split into clock domains and subdomains.
As shown in Figure 20, OMAP5912 is divided into four clock domains.
The RTC clock domain is totally independent and can be isolated by hardware
from other clock domains.
The clock and reset management (CLKRST) module manages clocks for the
MPU, DSP and traffic controller. For each clock domain, it is possible to adjust
the frequency for each clock.
The DPLL1 output frequency is programmable and can be further divided
down to provide specific clock values to each domain.
Each domain is further subdivided into subdomains that can be independently
activated or deactivated.
This flexible architecture allows different power-saving mechanisms for
different users.
For a complete overview of the clock and reset module, see chapter 2
OMAP3.2 Subsystem.
SPRU753A
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