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3.2.1 General Description
The AD6855 baseband transmit section supports the following mobile station GMSK modulation power
classes:
GSM 900/850 power classes 4 and 5,
DCS 1800 power classes 1 and 2, and
PCS 1900 power classes 1 and 2.
The AD6855 baseband transmit section supports the following mobile station 8-PSK modulation power
classes:
GSM 900/850 power classes E2 and E3,
DCS 1800 power classes E2 and E3, and
PCS 1900 power classes E2 and E3.
The AD6855 baseband receive section supports GMSK and 8-PSK applications.
The AD6855 auxiliary section provides a voltage reference, an automatic frequency control DAC, an
auxiliary ADC, and light controllers. The auxiliary ADC provides two channels for measuring
temperature using discrete external devices placed in critical locations. The AD6855 audio section
provides 8 kHz and 16 kHz sampling rates for voiceband data input and output and provides nine
standard sample rates ranging from 8kHz to 48 kHz for personal audio output on two PCM Audio serial
ports. The two Audio serial ports allow support for concurrency. The AD6855 power management
section provides voltage regulators for digital and analog components, a battery charger, battery
protection circuitry, and power supply activation logic. The AD6855 digital processor interface provides
serial ports for control data, baseband transmit and receive data, and two for audio data.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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LGE Internal Use Only
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