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Nokia 616 Service Manual: Description Of The Uem-states

Carkit phone (tfe-4/rv-1).
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List of Status-Change Reasons
1 VBAT < V
2 VBAT < V
3 VBAT
4 VBAT > V
5 VBAT
6 PWRONX = '0' or VCHAR
7 VBAT > V
8 DELAY2 elapses → Go to DELAY3
9 VBAT > C
10 DELAY4 elapses → Go to PWR_ON
11 SLEEPX = '0' → Go to SLEEP
12 SLEEPX = '1' → Go to PWR_ON
13 VBAT
14 No change
15 VBAT > V
16 PWRONX
17 Watchdog elapses (approx. 100 µs) → Go to PWR_OFF
18 Thermal shutdown → Go to PWR_OFF
19 PwrKeyWatchdog (4 sec.) elapses → Go to PWR_OFF

Description of the UEM-States

The different states of the UEM are explained further below:
No supply
In the NO_SUPPLY mode the UEM has no supply voltage (VBAT < V
V_BU
). This mode is due to the fact, that both supply voltages, the main battery and
COFF-
the backup battery, are either disconnected or both discharged to a low voltage level.
The UEM will recover from NO_SUPPLY into RESET mode if the VBAT voltage level rises
above the V
MSTR+
Issue 2.0 Mar/2005
Company Confidential
and VBACK > V_BU
MSTR
and VBACK < V_BU
MSTR
V
. VBACK < V_BU
MSTR+
. DELAY1 elapses → Go to RESET
MSTR
V
. VBACK > V_BU
MSTR+
VCHAR
→ Go to DELAY2
COFF+
. DELAY3 elapses → Go to DELAY4
OFF+
V
and VBAT > V
COFF-
MSTR-
→ Stay in PWR_OFF
MSTR
detection during DELAY2 → Go to PWR_OFF
level by either reconnecting the main battery or charge it to such level.
Copyright © 2005 Nokia Corporation.
Company Confidential
TF4 Technical Information
→ Go to BACK_UP
COFF
→ Go to NO_SUPPLY
COFF
→ Go to DELAY1
COFF
→ Go to DELAY1
COFF
or ALARM = '1' → Go to DELAY1
DET+
→ Go to PWR_OFF
TFE-4/RV-1
and VBACK <
MSTR
Page 8b-9

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