GX500 Operational Description Revision A
LG Electronics 71/143 LGE Property
3.21 Front End Module control
Implemented in the S-Gold3 (FL600) are two outputs which are FE1, FE2 for direct control of front end
modules with two logic input pins to select RX and TX mode as well as low and high band operation. FEM
need 2V85_VRF supply.
Table 3-15 FEM Control Logic
MODE Tx 1GHz
Tx 2GHz Rx 1GHz Rx 2GHz
VDD ON
ON ON ON
VC1 OFF ON OFF ON
VC2 ON ON OFF OFF
Figure 3-35 FEM schematic
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