Charger Initiated Power Up Procedure

0. INITIAL CONDITIONS:

- all components except DC/DC converter and CCONT RTC powered off

- all resets active

- battery connected

1. CHARGER ADDED:

1.1 The PSCC starts charging the battery with initial current. When the battery voltage reaches the switcher startup voltage level, the switcher will start up and supply the CCONT 1, which identifies the charger presence (vCHAr)

1.2 CCONT waits until Vdc_out exceeds 3.0 V 2

1.3 CCONT powers on its digital logic and sets the PWM output to100%

1.4 CCONT releases the reset of its digital logic after 50 us setup time

2. CCONT RELEASES BB, VCXO and COBBA-ANALOG 3REGULATORS:

2.1 CCONT releases SLEEPX/VXOEna signal

2.2 CCONT waits 62 ms 4

3. AFTER 62 ms DELAY CCONT RELEASES POWER UP RESET

(PURX) AND SETS CCONT_INT SIGNAL ACTIVE:

This may take some seconds depending upon the battery / switcher being able to supply sufficient current, if the battery is almost empty,

If charger is connected to empty battery this may take some seconds

VCXO regulator is controlled by SLEEPX/VXOEna signal. The regulator for the COBBA analog parts must follow the VCXO regulator to enable the AFC

62 ms setup time is used for VCXO settling

System Module

Technical Documentation

3.1 MAD takes over the system control

3.2 the SLEEPX signal control switches to MAD

3.3 MAD notices the CCONT_INT active

3.4 MAD reads the CCONT interrupt register, identifies the charger interrupt and starts to control the charging

In the end of the power up procedure initialized by adding the charger the phone goes to "POWER ON ACTING DEAD" state. In this state the only indication to the user are the battery charging alert and the scrolling battery mark in the display. In "POWER ON ACTING DEAD" state no actions against GSM network are done, the phone remains unknown to the network.

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