
deferredreplyprotocol. The400-MHzprocessorsystembususesSource-SynchronousTransfer
(SST)ofaddress anddatatoimproveperformancebytransferringdatafourtimes perbus clock(4X
datatransferrate,as inAGP4X).Alongwiththe4Xdatabus,theaddress bus candeliveraddresses
twotimesperbusclockandisreferredtoasa “double-clocked”or2Xaddress bus.Working
together,the4Xdatabusand2Xaddress busprovideadatabusbandwidthofup to3.2
Gbytes/second. TheprocessorsystembususesAdvancedGunning TransceiverLogic(AGTL+)
signaltechnology, avariantofGTL+signalling technologywithlowpowerenhancements.
Note: ThetermAGTL+hasbeenusedforAssistedGunning TransceiverLogictechnologyonother
Intelproducts.
TheprocessorfeaturesEnhancedIntelSpeedSteptechnology, whichenablesreal-timedynamic
switchingbetweenmultiplevoltageandfrequencypointsinsteadoftwopointssupportedon
previousversionsofIntelSpeedSteptechnology. Thisresultsinoptimalperformance without
compromising lowpower.TheprocessorfeaturestheAutoHalt, Stop-Grant,DeepSleep, and
DeeperSleeplowpowerstates.
TheIntelPentiumMprocessorutilizessocketableMicroFlip-ChipPinGridArray
(Micro-FCPGA)andsurface mountMicroFlip-ChipBallGridArray(Micro-FCBGA)package
technology. TheMicro-FCPGApackageplugsintoa479-hole,surface-mount, ZeroInsertionForce
(ZIF)socket, whichisreferredtoas themPGA479Msocket.
ThisdocumentincludesspecificationsfortheIntelPentiumMprocessoratHighestFrequency
Mode(HFM)corefrequenciesof1.30, 1.40, 1.50, 1.60 and1.70 GHz, theLowVoltageIntel
PentiumM processoratHFM corefrequencyof1.10 and1.20 GHzandtheUltraLowVoltageIntel
PentiumMprocessoratHFMcorefrequencyof900MHzand1.00 GHz.
B. NorthBridge –MCH855PM
Intel Centrino™mobiletechnologywithintegratedwirelessLANcapabilitieswasdesigned
specificallyforwirelessnotebookPCs –deliveringoutstandingmobileperformance andenabling
extendedbatterylifeandthinner,lighterdesigns.
TheIntel 855PMMemoryControllerHub(MCH)isanIntel Centrino™mobiletechnology
component. TheMCHmanagestheflowofinformationbetweenitsfourinterfaces:theprocessor
sidebus(communicationwiththeIntel Pentium Mprocessor),memoryinterface,AGPinterface,
TECHNICAL SERVICE MANUAL PrestigioNobile159W
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