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TFE-4/RV-1
Company Confidential
TF5 Technical Information
Nokia Customer Care
Page 8a-10
Copyright
©
2005
Nokia Corporation.
Issue 2.0 Mar/2005
Company Confidential
Description of the Powerstates
The Powerup/Powerdown-Behaviour for Nokia 610/616 is done as follows:
Figure 3: Powerstates of the TFE-4/RV-1 RU
Standby Mode
When the car is standing inactive (ignition is switched off), TFE-4/RV-1 shall be in
Standby mode. In this mode TFE-4/RV-1 is not operating. This mode is characterized by
very low power consumption (less than 1mA). This state will be reached when TFE-4/RV-
1 is connected to Carbattery first time
Active Mode
In active mode the engine-power supply is on and poweronx line is toggled by the pow-
eronx generator. Here the phone is generally full active from Power supply point-of-view.
After a short time (determined by Software) the UPP sets the B2BPOWEROFFX line high
and this initiates the transition to Active-Locked Mode. In case that Ignition signal is
going to low before that, direct transition to sleep mode will happen and the phone
engine will be powered off immediately.
Active Locked Mode
The active locked power mode is same as the active mode but UPP holds
B2BPOWEROFFX line high. If the the Ignition signal is going from high to low now, the
TFE-4/RV-1 will remain active but a transfer to the ignition-off mode will take place.
Standby
mode
POWERONX
Mode
Active
Mode
Ignition-off
Mode
Carbatt-Fail
Mode
IGNITION
high
Ignition
off
Phoneengine
sets
POWEROFFX
low
Carbattery
fails
Carbattery
fails
Carbattery
fails
Carbattery
fails
Carbattery
valid
Active-Locked
Mode
Ignition
off
B2BPOWEROFFX
set high
Carbattery
fails
Ignition on
Poweronx
time elapsed