Standbye Mode; Active Mode; Active Locked Mode; Ignition Off Mode - Nokia 616 Service Manual

TFE-4/RV-1
TF5 Technical Information
Description of the Powerstates
The Powerup/Powerdown-Behaviour for Nokia 610/616 is done as follows:
Standby
mode
Carbattery
fails
Phoneengine
sets
POWEROFFX
low
Ignition-off
Mode
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.
Page 8a-10
Company Confidential
IGNITION
high
Carbattery
valid
Carbatt-Fail
Mode
Carbattery
Carbattery
fails
fails
Ignition
off
Ignition on
Figure 3: Powerstates of the TFE-4/RV-1 RU
Copyright © 2005 Nokia Corporation.
Company Confidential
Nokia Customer Care
POWERONX
Mode
Carbattery
fails
Carbattery
fails
Ignition
off
B2BPOWEROFFX
Active-Locked
Mode
Poweronx
time elapsed
Active
Mode
set high
Issue 2.0 Mar/2005