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3. TECHNICAL BRIEF
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Only for training and service purposes
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LG530G
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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.
Figure 3.4.1 Block diagram of FEM
FEM
WCDMA PAM
GSM/GPRS/EDGE
PAM
QSC62X0
Baseband controller
+
Transceiver
+
Receiver
+
PMIC
Amplitude Control
PA Control
Power Control
Band Select
Antenna Switch Control
3.4 Control Flow
Figure 3.4.1 Block diagram of FEM