Specifications

Hardware Description

Power Input Module (PIM)

Apowerinputmodule(PIM)betweentheinputfusesandmainpowerbrick(‐48Vto12V

supply)providesinputpowerconditioningandthefollowingadditionalfeatures:

•Currenthandlingupto300W

• Inrushcurrentlimitprotection

•Integratedfi lterdesignedtomeetCISPRclassBEMIlimits

•11.88Wofisolatedauxi liary3.3VpowerforIPMIcircuitry.

• 750mWofisolatedauxiliary5VpowerforIPMIcircuitry.

•ORingFETsonAandB–48Vfeeds

•A/Bfeedlossalarm

•Hot‐swapcontrol

• Glitchhold‐upcircuitbasedonexternalcapacitorand72Vchargingcircuit

• Inputundervoltageandovervoltageprotection

•Overcurrentandthermalprotection

Inadditiontotheabovefeatures,thePIMincorporatescircuitr ytochargeexternalvoltage‐

holdcapacitors.Theseexternalcapacitors(1100uF/100V)chargetoanominal72Vand

provideshort‐termtransientandpowerlossprotectioninsupportofPICMG3.0

requirements.

TwointernalPIMregulators(a3.3Vswitchingsupplyanda5Vlinearsupply)sendpowerto

IPMCcomponents,theFPGAs,RTCcircuitry,theRTM,H/SLEDs,andtemperaturesensors.

Payload power supplies

Themainpowersupply(anisolatedquarterbrickDC‐DCconv ertor;thebrick)isa‐48Vto12V

convertor.Itsuppliesallofthe+12VDCpowerfortheCPM.Withtheexceptionofthe+3.3V

and+5VoutputfromthePIM,allothervoltagesontheCPMandRTMeithercomedirectly

fromorareconvertedfromthe+12Voutputsofthisbrick.RefertoFigure 6fordetailed

informationontheDC‐DCconvertorsthatconnecttothebrickoutput,thevoltages/current

developed,andtheCPMdevicesthatindividualpayloadpowersuppliesfeed.

Trusted Platform Module (TPM)

TheCPMusesanInfineonSLB9635TT1.2TrustedPlatformModule(TPM)toimplement

version1.2ofthe TrustedComputingGroupspecification.TheTPMsitsontheLPCbusand

hastheabilitytoassertaninterruptthroughthePCHSerialIRQinterface.

TheTPMisasecurekeygeneratorandkeycache

managementdevicethatsupportsindustry

standardcryptographicAPIs.TheTPMcontainssufficientcryptographicfunctionalityto

generate,store,andmanagecryptographickeysinhardwarewhileleveragingtheresourcesof

therestofthesystemplatform.

ThefivemajorfunctionsoftheTPMare:

• Publickeyfunctionsforon‐chipkeypairgenerationusing

ahardwareRNG