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Nokia Customer Care
TF-5R
BSI
DU
Connector
Vcar
Car
Connector
Powermonitor
Powerok
Within TFE-4/RV-1 there is a protection mechanism used to protect the Simcard when
the car battery is out of range. The 47K pulldown resistor on BSI will be only activated
when The car battery is in the right range. If not the BSI input of the UEM is driven
against Vflash1 by R202 on the engineboard. In this case the SIM card is disabled imme-
Issue 2.0 Mar/2005
Company Confidential
Figure 9: Nokia 610/616 specific SIM Realization
SIM
switch
Vflash1
Vflash1
R390
100k
47k
R202
100k
Copyright © 2005 Nokia Corporation.
Company Confidential
TF4 Technical Information
TF-4
SIM
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TFE-4/RV-1
Page 8b-21
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