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Nokia Customer Care
TF5 Technical Information
Company Confidential
TFE-4/RV-1
Issue 2.0 Mar/2005
Copyright
©
2005
Nokia Corporation.
Page 8a-19
Company Confidential
Signalname
Description
Range
When Error then .......
Outputs
SMPSon
Signal from Powercontrol
block that switches the
Powersupplies for active
Powermode
Low: (sleepmode)
0..1V
high (active
mode):
4..5V
Unit will not wakeup (when
always low)
or Sleepmode current will be
too high
(when always high)
B2BPOWERONX Reset signal that is toggled
by the POWEROX block dur-
ing startup
Opendrain out-
put (with exter-
nal pull-up to
2.7V):
Active : 0V
inactive: 2.7V
Phone-Engine will not
wakeup (when always low or
always high)
POWEROK
Output signal of the VCAR-
Check Block
4..5V if VCAR is
within operating
range (9..15V),
0..1V when VCAR
is out of range
Unit will not wakeup (when
always low)
or SMPSon will not be deac-
tivated if VCAR is out of
range
(when always high)
IGNS5V
To 5V Logic level translated
Ignition Signal
0V when Sense =
off, else
5V 5%
Unit will not wakeup (when
always low)
or SMPSon will not be deac-
tivated
(when always high)
B2BIGNS
To 1.8V Logic level translated
Ignition Signal
0V when Sense =
off, else
1.6..1.8V
Phoneunit will malfunction
BSI
Opendrain Output which
switches 47kR load to
Ground when Powerok is
active
0V when Pow-
erok, else
high impedance
Phoneunit will malfunction
(SIM cannot be read), Phone
always in Localmode