LG HB620 Service Manual page 34

3.5.8 Bluetooth (M701 : LBDA23QJS0)
The MSM6280 includes BT baseband embedded BT 1.1 compliant baseband core, so the other
bluetooth components are bluetooth RF module and Antenna. [Fig. 3.8] shows the bluetooth system
architecture in the HB620T.
AN T
BPF
16
GND Pa rt
GND GND
1 1 6 6
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Only for training and service purposes
LBRQ -2B43A LBRQ -2B43A
SYN C_DET/TX _EN SYN C_DET/TX _EN
RX_BB/TX _BB RX_BB/TX _BB
BCM2004
LDO Pa rt
8 8 2 2 3 3
15 15
[Fig. 3.8] Bluetooth system architecture
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3. TECHNICAL BRIEF
BlueQ Interface Pa rt
5 5
4 4
SBST SBST
13 13
SBCK SBCK 11 11
SBDT SBDT 12 12
Clo ck Pa rt
CLK _REF CLK _REF
9 9
XTAL _IN XTAL _IN 7 7 7
Supply Pa rt
VD D _MSM VD D _MSM 10 10
14 14
VD D_BAT VD D_BAT
MSM 6280
Bluetooth Baseband
BT_TX _RX_N
SBST
BT_DA TA
SBCK
SBDT
BT_CLK
TCX O
VR EG_MSMP
VD D_A
LGE Internal Use Only