Nokia RH-9 Series Ccs Technical Documentation page 20

RH-9
System Module & UI
Phone is exiting from NO_SUPPLY mode when sufficient battery voltage level is detected.
Battery voltage can rise either by connecting a new battery with VBAT > V
connecting charger and charging the battery above V
Power_off
In this state the phone is powered off, but supplied. VRTC regulator is active (enabled)
having supply voltage from main battery. Note, the RTC status in PWR_OFF mode
depends on whether RTC was enabled or not when entering PWR_OFF. From Power_off
mode UEM enters RESET mode (after 20ms delay), if any of following statements is true
(logical OR –function):
• Power_on button detected (PWROFFX)
• Charger connection detected (VCHARDET)
• RTC_ALARM detected
The Phone enters POWER_OFF mode from all the other modes except NO_SUPPLY if
internal watchdog elapses.
Acting Dead
If the phone is off when the charger is connected, the phone is powered on but enters a
state called "Acting Dead", in this mode no RF parts are powered. To the user, the phone
acts as if it was switched off. A battery charging alert is given and/or a battery charging
indication on the display is shown to acknowledge the user that the battery is being
charged.
Active
In the active mode the phone is in normal operation, scanning for channels, listening to
a base station, transmitting and processing information. There are several sub-states in
the active mode depending on if the phone is in burst reception, burst transmission, if
DSP is working etc.
In active mode the RF regulators are controlled by SW writing into UEM's registers
wanted settings: VR1A/B must be kept disabled. VR2 can be enabled or forced into low
quiescent current mode. VR3 is always enabled in active mode. VR4 -VR7 can be enabled,
disabled or forced into low quiescent current mode.
Regulator
VFLASH1
VFLASH2
VANA
Page 20
Table 21: Regulator controls
NOTE
Enabled; Low Iq mode during sleep
Not used in NHM-8, must be kept disabled
Enabled; Disabled in sleep mode
ãNokia Corporation
CCS Technical Documentation
.
MSTR+
or by
MSTR+
Issue 1 11/02