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HPDesignjetT520/T120PrinterCertificate
ofVolatility
Introduction
Thefollowingisastatementregardingthevolatilityofcustomerdatastoredinmemorydevicesandharddisk
drivesoftheHPDesignjetT520/T120ePrinter.
Theprinterusesvolatilememorytostorecustomerdataduringtheprintingprocess.Whentheprinteristurned
off,thisvolatilememoryiserased.Theprinterusesnon-volatilememorytostoredeviceconfiguration
information.Thisnon-volatileinformationisusedtoinitializethevolatilememorywhentheprinteristurnedon
andatthebeginningofaprintjob.Theprinteralsocontainsaharddiskdrivethatretainsdataaftertheprinter
ispoweredoff.
Volatilememory
‐MainSDRAM(DDR3):1GBinT520and256MBinT120.Usedassystemmemory.Allinfoiserasedwhen
printerispoweredoff.
‐MainICcache:embeddedRAMintheMainintegratedcircuitusedforitsinternalprocessandoperation.
Nonvolatilememory
‐NVM-Main:16KBytesSerialCMOSEEPROMwithBIOSparameters.
‐NVM-Backup:32Kbytes.ContainsacopyoftheNVM-MainandisaccessedincasethisMainPCAis
changed(Serviced).
‐SPIFlashIC:1GBforbootloaderstorage
‐NVMinthePrintheadassembly:someKBforPHAinformationstorage
‐NVMinthesupplies(x4):someKBforsuppliesinformationstorage
USBThumbdrive
2GBytesunitfor:
‐Firmwarestorage(non-volatilepart,thisinformationremainsalwaysinsidetheThumbdriveandisnot
accessiblebyuser)
‐Printjobsmanipulationandprocess(usedwhenprintingplotswithspecialneedsandhigh
computationalcapacity)
ThisstatementprovidesagenericviewofmemorydevicesvolatilityofthestatedDesignjetprinters.Itshouldnotbeuseasasupportingdocumentdirectlyorindirectlyforany
claimsagainstHewlett-Packard.H
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