Only For Training And Service Purposes - LG KF700 Service Manual

3.5.3 Front-End Module (FL100 : D5013)
This equipment uses a single antenna to support all handset operating modes, with an antenna switch
module select the operating frequency and band. UMTS operation requires simultaneous reception and
transmission, so the UMTS Rx/Tx connection is routed to a duplexer that separates receive and
transmit signals. The active connection is MSM-selected by three control lines (GPIO[9], GPIO[10], and
GPIO[11]). These GPIOs are programmed to be ANT_SEL0, ANT_SEL1, and ANT_SEL2 respectively.
GSM 850/GSM 900 TX
GSM 1800/GSM 1900 TX
WCDMA
GSM 850 RX
GSM 900 RX
GSM 1800 RX
GSM 1900 RX
3.5.4 PMIC Functional Block Diagram (U402 : PM6650-3P)
■ Input power management
- Valid external supply attachment and removal detection
- Supports unregulated (closed-loop) external charger supplies and USB supplies as input power
sources
- Supports lithium-ion main batteries
- Trickle, constant current, constant voltage, and pulsed charging of the main battery
- Supports coin cell backup battery (including charging)
- Battery voltage detectors with programmable thresholds
- VDD collapse protection
- Charger current regulation and real-time monitoring for over-current protection
- Charger transistor protection by power limit control
- Control drivers for two external pass transistors and one external battery MOSFET - MOSFET is
optional
- Voltage, current, and power control loops
- Automated recovery from sudden momentary power loss
Copyright © 2008 LG Electronics. Inc. All right reserved.

Only for training and service purposes

ANT_SEL0
H
H
H
L
L
L
L
[Table 3.2] Front End Module control logic
- 23 -
3. TECHNICAL BRIEF
ANT_SEL1 ANT_SEL2
L
H
L
L
L
H
H
LGE Internal Use Only
H
L
L
L
H
H
L