Rtc Alarm; Power Off; Power Consumption And Operation Modes; Power-Off Mode - Nokia RH-66 Troubleshooting Manual

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Charging is controlled by START_UP charge circuitry when it detects the VBAT level to be
below the master reset threshold (V
to rise above the charger detection threshold (VCH
charging initiates. The UEMC generates 100 mA of constant output current from the
connected charger's output voltage. The battery's voltage rises at it charges, and when
the VBAT voltage level is detected to be higher than the master reset threshold limit
(V ), the START_UP charge is terminated.
MSTR+
The charge control (CHACON) monitors the VBAT voltage level. A MSTRX='1' output reset
signal (internal to the UEMC) is given to the UEMC's reset block when the VBAT is
greater than the V
If the VBAT is detected to fall below V
cancelled. Charging restarts if a new rising edge on the VCHAR input is detected (VCHAR
rising above VCH

RTC Alarm

If the mobile terminal is in power-off mode when the RTC alarm begins, the wake-up
procedure occurs. After the baseband is powered on, an interrupt is given to the MCU.
When an RTC alarm occurs during active mode, the interrupt is generated to the MCU.

Power Off

The baseband switches to power-off mode if any of following occurs:
• Power key is pressed
• Battery voltage is too low (VBATT < 3.2 V)
• Watchdog timer register expires
The UEMC controls the power-down procedure.

Power Consumption and Operation Modes

Power-off Mode

In power-off mode, power (VBAT) is supplied to the UEMC, vibra, LED, PA, and PA drivers.
During this mode, the current consumption is approximately 35 uA.

Sleep Mode

In sleep mode, both processors (MCU and DSP) are in stand-by. The mobile terminal
enters sleep mode only when both processors make the request. When the UEMC detects
as low SLEEPX signal, the mobile terminal enters sleep mode. The VIO and VFLASH1
regulators are put into low quiescent current mode, VCORE enters LDO mode, and the
VANA and VFLASH2 regulators are disabled. All RF regulators are disabled during sleep
mode. When the SLEEPX signal is detected high by the UEMC, the mobile terminal enters
active mode and all functions are activated.
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MSTR-
and the UEMC enters into the reset sequence.
MSTR+
).
DET+
©2005 Nokia Corporation
). Connecting a charger forces the VCHAR input
), and by detection start-up
DET+
during start-up charging, charging is
MSTR
Company Confidential Issue 1 03/2005