User's Manual

Power Interface
Rev 1.12.4 Oct.09 Proprietary and Confidential 17
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
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.
Normal state
Note: This is the default state
when VCC3.3 is first applied in
the absence of W_Disable#
control.
Thisistheactivestateofthemodule.Inthisstate:
• Themoduleisfullypowered.
• Themoduleiscapableofplacing/receivingcallsorestab‐
lishingdataconnectionsonthewirelessnetwork.
• TheUSBinterfaceisfullyactive.
Low power mode
Inthisstate,RF(bot hRxandTx)isdisabledinthemodule,but
theUSBinterfaceisstillactive.Thislowpowermode
(ʺairplanemodeʺ)iscontrolledbysoftwarecommands
throughthehostinterface.
Forinstructionsonusingthecommands,refertoATCommand
SetforUserEquipment
(UE)(Release6)(+CFUN=0command),
CDMACnSReference(Document2130754)
(CNS_RADIO_POWER[0x1075]command),orMC87XX
ModemCnSReference(Document2130602)(DisableModem
command).
Usage models
Usagemodelscanbeusedtocalculate expectedcurrent
consumption.AsampleusagemodelisprovidedinTable2‐1.
Table 2-1: Power consumption of a sample application
Used by a field worker
(data only)
Used for remote data
logging
Upload (module
Tx)
1000 kB/day 40 kB/h
Download
(module Rx)
500 kB/day 100 kB/day
Coverage / data
rate
1X / 80 kbps IS-95 / 14.4 kbps