User's Manual
Table Of Contents
Power Interface
Rev 1.8.1 May.08 Proprietary and Confidential 13
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Normal state
Note: This is the default state
when VCC3.3 is first applied in
the absence of W_Disable#
control.
Thisistheactivestateofthemodule.Inthisstate:
• Themoduleisfullypowered.
• Themoduleiscapableofplacing/receivingcallsorestab‐
lishingdataconnectionsonthewirelessnetwork.
• TheUSBinterfaceisfullyactive.
Low power mode
Inthisstate,RF(bot hRxandTx)isdisabledinthemodule,but
theUSBinterfaceisstillactive.Thislowpowermode
(ʺairplanemodeʺ)iscontrolledbysoftwarecommands
throughthehostinterface.
Forinstructionsonusingthecommands,refertoATCommand
SetforUserEquipment(UE)(Release6)(+CFUN=0command),
AirCard595U/595/MC5725/MC5725VMiniCardCnSReference
(Document2130754)(CNS_RADIO_POWER[0x1075]
command),orMC87XXModemCnSReference(Document
2130602)(DisableModemcommand).
Usage models
Usagemodelscanbeusedtocalculate expectedcurrent
consumption.Asampleusagemodelisprovidedin
Table2‐1.
Thisexamplemodelappliestoabattery‐operateddevice.In
practice,becausethemoduleisisolat edfrom thebattery(the
hostdevicemanagesthepowersource),themAhratings
dependonthedevice’ssupplyefficiency.
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
Hours of
operation
8/day (off 16 hrs/day) 24/day
Total power
consumed over
24 hours
60 mAh 200 mAh