User's Manual
Table Of Contents
2
Rev 1.8.1 May.08 Proprietary and Confidential 11
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
2: Power Interface
Overview of operation
Note: This chapter contains information for CDMA (MC57xx) and
GSM (MC87xx) modules.
Information that is unique to specific module types is clearly
identified.
Themoduleisdesignedtousea3.3V(nominal)powersupply,
providedbythehost.Itisthehost’sresponsibilitytoprovide
safeandcontinuouspowertothemoduleatalltimes;the
moduledoesNOThaveanindependentpowersupply,or
protectioncircuitstoguardagainstelectricalissues.
Themodule’spowerstateiscontrolledbythehost’sassertion/
de‐assertionoftheW_Disable#signal.Themodulealso
monitorsitssupplyvoltageandrequestsshutdownifthe
supplyisinsufficient.
Power signals
Themodulemustbeconnectedtoa3.3Vpowersupply(as
describedinPCIExpressMiniCardElectromechanicalSpecifi
‐
cationRevision1.1).
TheMC87xxhasmorepowerpinsthantheMC57xxdueto
higherpeakcurrentrequirementsforGSMdevices.
Fordetailedpinoutandvoltage/currentrequirementsofthese
modules,seetheProductSpecificationDocumentforyour
MiniCard.
Electrostatic discharge (ESD)
Youareresponsibleforensuringthatthehosthasadequate
ESDprotectionondigitalcircuitsandantennaports:
• (Operational)RFport(antennalaunchandRFconnector):
IEC‐61000‐4‐2—Level(ElectrostaticDischargeImmunityTest)
• (Non‐operational)Hostconnectorinterface:
JESD22‐A114 ‐B
+/‐1kVHumanBodyModeland
JESD22‐C101
+/‐125VChargedDeviceModel
Specificrecommendationsareprovidedwhereneededinthis
guide,however,thelevelofprotectionrequireddependson
yourapplication.