Texas Instruments TMS320DM646x Computer Hardware User Manual


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6.2PowerDomainandModuleTopology
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
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PowerDomainandModuleTopology
TheDM646xDMSoCsystemincludesonlyonepowerdomain(AlwaysOn)andmultipleseparate
modules,asshowninFigure6-2andsummarizedinTable6-1.TheAlwaysOnpowerdomainisalwaysin
theONstatewhenthechipispowered-on.TheAlwaysOndomainispoweredbytheCV
DD
pinsofthe
DM646xDMSoC(seethedevice-specificdatamanual).AlloftheDM646xDMSoCmodulesresidewithin
theAlwaysOnpowerdomain.Seethedevice-specificdatamanualfordetailsontheclockdomains.
Table6-1showsthestateofeachmoduleafterchippower-on/hardreset.ThedefaultstateoftheDSP
moduleisdeterminedbytheDSPbootsource(DSPBOOT)pin.IftheDSPisselectedtoself-bootatreset
viathissignal,theDSPmoduleisenabledbydefault.TheARM,Timer2,andSystemModulearealways
enabled.
Figure6-2.TMS320DM646xDMSoCPowerDomainandModuleTopology
SPRUEP9A–May2008PowerandSleepController(PSC)63
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