Control Flow - LG lg530g Service Manual

3.4 Control Flow

3.4 Control Flow
The access side of the digital baseband controller controls the overall radio system. In both EDGE/GSM/GPRS
and W-CDMA air interface mode, the digital baseband controller controls the radio system through a serial
bus .The digital baseband controller also manages PA band control and the antenna switch mechanism in the
front end module.
The EDGE/GSM/GPRS RF system requires control, which is temperature dependent.
The temperature within the RF system is estimated by a voltage measurement performed by the analog
baseband controller. The control flow for the RF system is shown in Figure 3.4.1.
FEM
LGE Internal Use Only
Amplitude Control
WCDMA PAM
Power Control
GSM/GPRS/EDGE
PAM
Antenna Switch Control
Figure 3.4.1 Block diagram of FEM
Figure 3.4.1 Block diagram of FEM
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3. TECHNICAL BRIEF
PA Control
Band Select
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG530G
QSC62X0
Baseband controller
+
Transceiver
+
Receiver
+
PMIC