Power Consumption And Operation Modes; Power-Off Mode; Sleep Mode; Active Mode - Nokia 7088 Troubleshooting Manual

Nokia Customer Care

Power Consumption and Operation Modes

Power-off Mode

In power-off mode, power (VPH_PWR) is supplied to the PM6610, RF PA, vibrator,
audio amplifier, keypad backlight LED, LCD backlight booster, flash light booster and
regulator to support the application of camera. During this mode, the power
consumption is approximately 200 uA.

Sleep Mode

The mobile terminal enters sleep mode only when MSM makes the request to
PM6610 through the SBI bus. PM then enters Power Saving Mode, but the
VDD_MSMC VDD_MSMP regulators remain in power-on status. The 32.768 kHz
crystals are enabled. TCXO buffers are off. All other functions and regulators are
controlled individually via SBI and are typically disabled for minimum power
dissipation.
It exits the Sleep mode either by the expiration of a sleep clock counter in the
PM6610 or by some external interrupt (generated by a charger connection, key press,
headset connection, etc.). The TCXO is shut down in sleep mode and the 32.768
kHz sleep clock oscillator is used as a reference clock for the base band.

Active Mode

In active mode, the mobile terminal operates normally. It scans channels, listens to a
base station, transmits and processes information. There are several sub-states
under the active mode. Depending on the mobile terminal's current state, there are
states such as burst reception, burst transmission, etc.
In active mode, this is a normal operating mode for PM6610 IC. VDD_MSMC,
VDD_MSMP, VDD_MSMA, VREG_RUIM, VREG_RFRX, VREG_RFTX, and
VREG_TCXO regulators are all turned on. TCXO oscillator is enabled, and TCXO
buffers are turned on. All other functions and regulators are controlled individually via
SBI.

Charging Mode

Charging mode can function in parallel with any other operating mode. A battery ID
resistor inside the battery pack indicates the battery type/ size. The resistor value
corresponds to a specific battery capacity. The PM measures the battery voltage,
Issue 1 12/2006 © 2006 Nokia Corporation
Baseband Description and Troubleshooting
Company Confidential
7088 (Flower)
Page 9