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3. TECHNICAL BRIEF
3.2.2 Power Block
CSPORT interface, power management control interface and the circuit that generates power up
RESET pulses (RESET2P8 and RESET1P8) for use by the DBB chip.
All regulators except the USB interface regulator are powered from the main battery.
The USB regulator is powered from USB VBUS.
And the user presses KEYON which puts the AD6855 power management system into ACTIVATION
state (see definitions below) and signals DBB software that it's time to wake up and operate using the
KEYOUT signal.
LGE Internal Use Only
Figure. 3-2-2 AD6855 POWER BLOCK DIAGRAM
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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