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6.2 Power Domain and Module Topology
sysclk2
domain
PLL0
sysclk3
domain
sysclk4
domain
sysclk5
domain
sysclk6
domain
sysclk7
domain
sysclk8
domain
sysclk9
domain
sysclk1
domain
sysclkbp
domain
Alwayson
powerdomain
PLL1
sysclk1
domain
Power
24MHZosc
domain
www.ti.com Power Domain and Module Topology
The DM646x DMSoC system includes only one power domain (Always On) and multiple separate
modules, as shown in Figure 6-2 and summarized in Table 6-1 . The Always On power domain is always in
the ON state when the chip is powered-on. The Always On domain is powered by the CV
DD
pins of the
DM646x DMSoC (see the device-specific data manual). All of the DM646x DMSoC modules reside within
the Always On power domain. See the device-specific data manual for details on the clock domains.
Table 6-1 shows the state of each module after chip power-on/hard reset. The default state of the DSP
module is determined by the DSP boot source (DSPBOOT) pin. If the DSP is selected to self-boot at reset
via this signal, the DSP module is enabled by default. The ARM, Timer2, and System Module are always
enabled.
Figure 6-2. TMS320DM646x DMSoC Power Domain and Module Topology
SPRUEP9A – May 2008 Power and Sleep Controller (PSC) 63
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