User's Manual

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
12 Proprietary and Confidential 2130114
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Note: ESD protection is highly recommended for the USIM connector
at the point where the contacts are exposed, and for any other signals
from the host interface that would be subjected to ESD by the user of
the product.
Module power states
Note: The module unit defaults
to the Normal state when
VCC3.3 is first applied in the
absence of W_Disable# control.
Themodulehasfourpowerstates:
• Disconnected
Nopowertothemodule.
• Off
Powertothemodule,butthemodule ispoweredoff.
• Normal
Themoduleisactive.Severalmodesarepossible(Receive,
Transmit,Sleep,Shutdown).
• Low power (“airplane mode”)
Themoduleisactive,butRFisdisabled.
Statemachinesareimplementedinthemoduletomonitorthe
powersupplyandoperatingtemperature.
Disconnected state
Note: The difference between
the Disconnected and Off states
is that, in the Off state, the
module is still connected to the
power source and draws minimal
current.
Thisstateoccurswhenthereisnopowertothemodule—the
hostpowersourceisdisconnectedfromthemoduleandall
voltagesassociatedwiththemoduleareat0
V.
Whetherthehostdeviceisalsopoweredoffdependsonthe
powerraildesign.Iftheconnectionbetweenthepowerrail
andthemoduleiscontrolledbythehost,thehostcanstay
poweredonandcutthepowertoputthemodemintothe
disconnectedstate.Ifthepowerrail
issharedbetweenthehost
deviceandthemodule,thehostispoweredoffwhenthe
moduleispoweredoff.
Off state
Inthisstate,thehostispoweredupandthemoduleis
powereddown(butstillconnectedtothepowersource).
Thehostkeepsthemodulepoweredoffbydrivingthe
W_Disable#signallow.Inthisstate,themoduledrawsminimal
current.