Realtek RTL8188CE User manual

802.11b/g/nRTL8188CE miniCard
User sManual
Rev. 1.0
08 Jun 2011
Realtek SemiconductorCorp.
No. 2, InnovationRoadII, Hsinchu Science Park, Hsinchu 300, Taiwan
Tel.:[phone]. Fax:[phone]
www.realtek.com.tw
RTL8188CE, RTL8188CEAU

RTL8188CE, RTL8188CEAU
User s Manual
ii Rev.1.0
COPYRIGHT
2009 RealtekSemiconductorCorp.All rightsreserved.Nopartofthisdocumentmaybereproduced,
transmitted,transcribed,storedinaretrievalsystem,ortranslatedintoanylanguageinanyformorbyany
meanswithoutthewrittenpermissionofRealtekSemiconductorCorp.
DISCLAIMER
Realtekprovidesthisdocument “asis”,withoutwarrantyofanykind,neitherexpressednorimplied,
including,butnotlimitedto,theparticularpurpose.Realtekmaymakeimprovements and/orchanges inthis
documentorintheproductdescribedinthisdocumentatanytime.Thisdocumentcouldincludetechnical
inaccuraciesortypographicalerrors.
TRADEMARKS
RealtekisatrademarkofRealtekSemiconductorCorporation.Othernames mentionedinthis documentare
trademarks/registeredtrademarksoftheirrespectiveowners.
USING THISDOCUMENT
Thisdocumentisintendedforthesoftwareengineer’sreference andprovidesdetailedprogramming
information.
Thougheveryefforthasbeenmadetoensurethatthisdocumentiscurrentandaccurate,moreinformation
mayhavebecomeavailablesubsequenttotheproductionofthisguide.Inthatevent,pleasecontactyour
Realtekrepresentativeforadditionalinformationthatmayhelpinthedevelopmentprocess.

RTL8188CE, RTL8188CEAU
User s Manual
iii Rev.1.0
TableofContents
1. GENERALDESCRIPTION.........................................................................................................................................1
2. FEATURES...................................................................................................................................................................2
3. BLOCKDIAGRAM.....................................................................................................................................................3
4. PRODUCTSPECIFICATIONS...................................................................................................................................4
4.1. MINI PCI EXPRESS PIN ASSIGNMENT.........................................................................................................................4
4.2. MECHANICAL...........................................................................................................................................................5
4.3. ENVIRONMENTAL.....................................................................................................................................................5
4.3.1. Operating........................................................................................................................................................5
4.3.2. Storage............................................................................................................................................................5
4.4. FUNCTIONAL SPECIFICATIONS...................................................................................................................................5
4.5. WARNING ................................................................................................................................................................6
4.5.1FederalCommunication Commission Interference Statement.................................................................................6
4.5.2IndustryCanada Statement...................................................................................................................................8
4.5.3NCC 語 ...........................................................................................................................................................10
ListofTables
TABLE 1. MINI PCI EXPRESS PIN ASSIGNMENT........................................................................................................................4
TABLE 2. FUNCTIONAL SPECIFICATIONS..................................................................................................................................5
ListofFigures
FIGURE 1. RTL8188CE MINICARD APPLICATION DIAGRAM.....................................................................................................3
FIGURE 2. RTL8188CE MINICARD MECHANICAL SPECIFICATION.............................................................................................5

RTL8188CE, RTL8188CEAU
User s Manual
1Rev.1.0
1. GeneralDescription
TheRealtekRTL8188CE, RTL8188CEAUisahighlyintegratedsingle-chipWireless LAN(WLAN)
controllercompatiblewiththeIEEE 802.11nspecification.ItcombinesaMAC,a1T1Rcapablebaseband,
andRFinasinglechip.TheRTL8188CE, RTL8188CEAUprovidesacompletesolutionfora
high-performance wireless client.
TheRTL8188CE, RTL8188CEAUbasebandimplementsMultipleInput,MultipleOutput(MIMO)
OrthogonalFrequencyDivisionMultiplexing(OFDM)withonetransmitandonereceivepath(1T1R).
Featuresincludeonespatialstreamtransmission, shortGuardInterval(GI) of400ns,spatialspreading,and
supportforboth20MHzand40MHzchannelbandwidth.
Forlegacycompatibility,DirectSequence SpreadSpectrum(DSSS),ComplementaryCodeKeying(CCK)
andOFDMbasebandprocessingareincludedtosupportall IEEE 802.11b,and802.11g datarates.
Differentialphaseshiftkeyingmodulationschemes,DBPSKandDQPSKwithdatascramblingcapabilityare
available,andCCKprovidessupportforlegacydatarates,withlongorshortpreamble.Thehighspeed
FFT/IFFTpaths,combinedwithBPSK,QPSK,16QAM,and64QAMmodulationoftheindividual
subcarriers,andratecompatiblepuncturedconvolutionalcodingwithcodingrateof1/2,2/3,3/4,and5/6,
providehigherdataratesof54Mbpsand150MbpsforIEEE 802.11g and802.11nOFDMrespectively.
TheRTL8188CE, RTL8188CEAUbuildsinanenhancedsignaldetector,anadaptivefrequencydomain
equalizer,andasoft-decisionViterbidecodertoalleviateseveremulti-patheffectsandmutualinterference in
thereceptionofmultiplestreams.Robustinterference detectionandsuppressionareprovidedtoprotect
againstBluetooth, cordless phone, andmicrowaveoveninterference.
EfficientIQ-imbalance,DCoffset,phasenoise,frequencyoffset,andtimingoffsetcompensationsare
providedfortheradiofrequencyfront-end.SelectabledigitaltransmitandreceiveFIRfilters areprovidedto
meettransmitspectrummaskrequirementsandtorejectadjacentchannelinterference, respectively.
TheRTL8188CE, RTL8188CEAUsupportsfastreceiverAutomaticGainControl(AGC)withsynchronous
andasynchronouscontrolloopsamongantennas,antennadiversityfunctions,andadaptivetransmitpower
controlfunctionstoobtainbetterperformance intheanalogportionsofthetransceiver.
TheRTL8188CE, RTL8188CEAUMACsupports802.11eformultimediaapplications,802.11iforsecurity,
and802.11nforenhancedMACprotocolefficiency.Usingpacketaggregationtechniques suchas A-MPDU
withBAandA-MSDU,protocolefficiencyissignificantlyimproved.Powersavingmechanismssuchas
U-APSD,andAPSD,reducespowerwastedduringidletime,andcompensates fortheextrapowerrequired
totransmitOFDM.TheRTL8188CE, RTL8188CEAUprovidessimplelegacyand20MHz/40MHz
co-existence mechanismstoensurebackwardandnetworkcompatibility.

RTL8188CE, RTL8188CEAU
User s Manual
2Rev.1.0
2. Features
General
n48-pinQFN
nCMOSMAC, BasebandPHY andRFina
singlechipforIEEE 802.11b/g/ncompatible
WLAN
n75MbpsreceivePHY rateand75Mbps
transmitPHY rateusing20MHzbandwidth
n150MbpsreceivePHY rateand150Mbps
transmitPHY rateusing40MHzbandwidth
nCompatiblewith802.11nspecification
nBackwardcompatiblewith802.11b/gdevices
whileoperatingat802.11ndatarates
HostInterface
nComplieswithPCIExpress Base
SpecificationRevision1.1/USB2.0
StandardsSupported
nIEEE 802.11b/g/ncompatibleWLAN
nIEEE 802.11eQoSEnhancement(WMM)
nIEEE 802.11i(WPA, WPA2). Open, shared
key,andpair-wisekeyauthenticationservices
MAC Features
nFrameaggregationforincreasedMAC
efficiency(A-MSDU, A-MPDU)
nLowlatencyimmediateHigh-Throughput
BlockAcknowledgement(HT-BA)
nLongNAVformediareservationwith
CF-EndforNAVrelease
nPHY-levelspoofingtoenhance legacy
compatibility
nPowersavingmechanism
nChannelmanagementandco-existence
nMultipleBSSIDfeatureallowsthe
RTL8188CE toassumemultipleMAC
identitieswhenusedasawireless bridge
nSupportsWake-On-WLANviaMagicPacket
andWake-up frame
nTransmitOpportunity(TXOP)Short
Inter-FrameSpace (SIFS)burstingforhigher
multimediabandwidth
PeripheralInterfaces
nGeneralPurposeInput/Output(8pins)
nThree configurableLEDpins
nConfigurableBluetoothCoexistence
Interface
PHYFeatures
nIEEE 802.11nOFDM
nOneTransmitandoneReceivepath(1T1R)
n20MHzand40MHzbandwidthtransmission
nShortGuardInterval(400ns)
nDSSS withDBPSKandDQPSK, CCK
modulationwithlongandshortpreamble
nOFDMwithBPSK, QPSK, 16QAM, and
64QAMmodulation. ConvolutionalCoding
Rate:1/2, 2/3, 3/4, and5/6
nMaximumdatarate54Mbpsin802.11g, and
150Mbpsin802.11n
nSwitchdiversityforDSSS/CCK
nHardwareantennadiversity
nSelectabledigitaltransmitandreceiveFIR
filters
nProgrammablescalingintransmitterand
receivertotradequantizationnoiseagainst
increasedprobabilityofclipping
nFastreceiverAutomaticGainControl(AGC)
nOn-chipADCandDAC

RTL8188CE, RTL8188CEAU
User s Manual
3Rev.1.0
3. BlockDiagram
AntennaB
2.4GHz
PA
2.4GHz
Transceiver
TXI/Q
NVMemory
ADCDAC
SPS/LDO
Regulators
40MHz
Crystal
MAC
Configuration
Controland
Memory
Ext
Interface
Baseband
(PHY)
RTL8188CE
Host
Interface
3.3V
RXI/Q
AntennaA
LED
Radio
on/off
40MHz
Crystal
TX/RX
Matching
Circuit
Figure 1. RTL8188CE, RTL8188CEAUminiCardApplication Diagram

RTL8188CE, RTL8188CEAU
User s Manual
4Rev.1.0
4. Productspecifications
4.1.MiniPCIExpress PinAssignment
Table1. Mini PCI Express Pin Assignment
PIN# PinName PIN# PinName
1WAKE# YES 23.3Vaux YES
3COEX1 YES 4GND YES
5COEX2 YES 61.5V NC
7CLKREQ# YES 8UIM_PWR NC
9GND YES 10 UIM_DATA NC
11 REFCLK- YES 12 UIM_CLK NC
13 REFCLK+ YES 14 UIM_RESET NC
15 GND YES 16 UIM_VPP NC
17 RESERVED NC 18 GND YES
19 RESERVED NC 20 W_DISABLE# YES
21 GND YES 22 PERST# YES
23 PERn0 YES 24 +3.3Vaux NC
25 PERp0 YES 26 GND YES
27 GND YES 28 +1.5V NC
29 GND YES 30 SMB_CLK NC
31 PETn0 YES 32 SMB_DATA NC
33 PETp0 YES 34 GND YES
35 GND YES 36 USB_D- YES
37 GND YES 38 USB_D+ YES
39 +3.3Vaux NC 40 GND NC
41 +3.3Vaux NC 42 LED_WWAN# NC
43 GND YES 44 LED_WLAN# YES
45 RESERVED NC 46 LED_WPAN# NC
47 RESERVED NC 48 +1.5V YES
49 RESERVED NC 50 GND YES
51 RESERVED NC 52 +3.3Vaux YES

RTL8188CE, RTL8188CEAU
User s Manual
5Rev.1.0
4.2.Mechanical
Figure 2. RTL8188CE, RTL8188CEAUminiCard Mechanical Specification
4.3.Environmental
4.3.1.Operating
OperatingTemperature: 0to70 °C
RelativeHumidity: 5-90%(non-condensing)
4.3.2.Storage
Temperature: -55 to125 °C
RelevantHumidity: 5-95%(non-condensing)
4.4.FunctionalSpecifications
Table2. Functional Specifications
POWERSUPPLY 3.3Vdc±0.3Vdc, 365mAfromhostequipment
MODULATIONTYPE CCK, DQPSK, DBPSKforDSSS
64QAM, 16QAM, QPSK, BPSKforOFDM
MODULATIONTechnology
DSSS, OFDM

RTL8188CE, RTL8188CEAU
User s Manual
6Rev.1.0
Transferrate 802.11b:11 /5.5/2/1Mbps
802.11g:54 /48 /36 /24 /18 /12 /9/6Mbps
Draft802.11n(20MHz,
800ns GI):65 /58.5/52 /39 /26 /19.5/
13 /6.5Mbps
Draft802.11n(40MHz, 800nsGI):135 /121.5/108 /81 /54 /
40.5/27 /13.5Mbps
Draft802.11n(20MHz, 400nsGI):72.2/65 /57.8/43.3/28.9/
21.7/14.4/7.2Mbps
Draft802.11n(40MHz,400
ns GI):150 /135 /120 /90 /60 /45 /
30 /15Mbps
FREQUENCY Range 2400MHz~2483.5MHz
NUMBEROFCHANNEL 11 for802.11b, 802.11g, draft802.11n(20MHz)
7fordraft802.11n(40MHz)
4.5.Warning
4.5.1FederalCommunicationCommissionInterference Statement
ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClass Bdigitaldevice,
pursuanttoPart15 oftheFCC Rules. Theselimitsaredesignedtoprovidereasonableprotectionagainst
harmfulinterference inaresidentialinstallation. Thisequipmentgenerates, usesandcanradiateradio
frequencyenergyand, ifnotinstalledandusedinaccordance withtheinstructions, maycauseharmful
interference toradiocommunications. However, thereisnoguarantee thatinterference will notoccurina
particularinstallation. Ifthisequipmentdoescauseharmfulinterference toradioortelevisionreception,
whichcanbedeterminedbyturningtheequipmentoff andon, theuserisencouragedtotrytocorrectthe
interference byoneofthefollowingmeasures:
- Reorientorrelocatethereceivingantenna.
- Increasetheseparationbetweentheequipmentandreceiver.
- Connecttheequipmentintoanoutletonacircuitdifferentfromthat
towhichthereceiverisconnected.
- Consultthedealeroranexperiencedradio/TVtechnicianforhelp.
Thisdevice complieswithPart15 oftheFCC Rules.Operationissubjecttothefollowingtwoconditions:(1)
Thisdevice maynotcauseharmfulinterference, and(2)thisdevice mustacceptanyinterference received,
includinginterference thatmaycauseundesiredoperation.
FCC Caution:Anychangesormodifications notexpresslyapprovedbythepartyresponsibleforcompliance
couldvoidtheuser'sauthoritytooperatethisequipment.
IMPORTANT NOTE:
FCC RadiationExposureStatement:
ThisequipmentcomplieswithFCC radiationexposurelimits setforthforanuncontrolledenvironment.This
equipmentshouldbeinstalledandoperatedwithminimumdistance 20cmbetweentheradiator&yourbody.

RTL8188CE, RTL8188CEAU
User s Manual
7Rev.1.0
Thistransmittermustnotbeco-locatedoroperatinginconjunctionwithanyotherantennaortransmitter.
IEEE 802.11bor802.11g operationofthisproductintheU.S.A. isfirmware-limitedtochannels1through
11.
Thisdevice isintendedonlyforOEMintegratorsunderthefollowingconditions:
Theantennamustbeinstalledsuchthat20 cmismaintainedbetweentheantennaandusers, and
Thetransmittermodulemaynotbeco-locatedwithanyothertransmitterorantenna,
Forall productsmarketinUS, OEMhastolimittheoperationchannelsinCH1toCH11 for2.4Gbandby
suppliedfirmwareprogrammingtool. OEMshall notsupplyanytoolorinfototheend-userregardingto
RegulatoryDomainchange.
Aslongas3conditionsabovearemet, furthertransmittertestwill notberequired. However, theOEM
integratorisstill responsiblefortestingtheirend-productforanyadditionalcompliance requirements
requiredwiththis moduleinstalled(forexample,digitaldevice emissions,PCperipheralrequirements, etc.).
IMPORTANT NOTE:Intheeventthattheseconditionscannotbemet(forexamplecertainlaptop
configurationsorco-locationwithanothertransmitter), thentheFCC authorizationisnolongerconsidered
validandtheFCC IDcannotbeusedonthefinalproduct. Inthesecircumstances, theOEMintegratorwill
beresponsibleforre-evaluatingtheendproduct(includingthetransmitter) andobtainingaseparateFCC
authorization.
EndProductLabeling
This transmittermoduleis authorizedonlyforuseindevice wheretheantennamaybeinstalledsuchthat20
cmmaybemaintainedbetweentheantennaandusers.Thefinalendproductmustbelabeledinavisiblearea
withthefollowing: “ContainsFCC ID:TX2-RTL8188CE”.
ManualInformationTotheEndUser
TheOEMintegratorhastobeawarenottoprovideinformationtotheenduserregardinghowtoinstall or
removethisRFmoduleintheuser’smanualoftheendproductwhichintegratesthismodule.
Theendusermanualshall includeall requiredregulatoryinformation/warningasshowinthismanual.
IndustryCanadaStatement
This device complies withRSS-210 oftheIndustryCanadaRules.Operationis subjecttothefollowingtwo
conditions:
1)thisdevice maynotcauseinterference and
2)this device mustacceptanyinterference,includinginterference thatmaycauseundesiredoperationofthe
device
Thisdevice hasbeendesignedtooperatewithanantennahavingamaximumgainof3.45dBi.
Antennahavingahighergainis strictlyprohibitedperregulationsofIndustryCanada. Therequiredantenna
impedance is50 ohms.
Toreduce potentialradiointerference tootherusers, theantennatypeanditsgainshouldbesochosenthat
theEIRPisnotmorethanrequiredforsuccessfulcommunication.
IMPORTANT NOTE: