LG KF690 Service Manual page 22

3.4.5 Bluetooth (M100 : LBRQ-2B43A)
The ESM6270 includes BT baseband embedded BT 1.1 compliant baseband core, so the other
bluetooth components are bluetooth RF module and Antenna. [Fig. 3.6]shows the bluetooth system
architecture in the KF690.
AN T
16 BPF
GND Pa rt
GND
1 6
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Only for training and service purposes
LBRQ -2B43A
SYN C_DET/TX _EN
BCM2004
LDO Pa rt
8 2 3
15
[Fig. 3.6] Bluetooth system architecture
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3. TECHNICAL BRIEF
BlueQ Interface Pa rt
5
SBST 4
RX_BB/TX _BB
13
SBCK 11
SBDT 12
Clo ck Pa rt
CLK _REF
9
XTAL _IN 7
Supply Pa rt
10
VD D _MSM
14
VD D_BAT
MSM 6280
Bluetooth Baseband
BT_TX _RX_N
SBST
BT_DA TA
SBCK
SBDT
BT_CLK
7 TCX O
VR EG_MSMP
VD D_A
LGE Internal Use Only