LG KT520 Service Manual page 38

G. KT520 Bluetooth Schematic
RESOUT2_n
BT_CLK
RTCCLK
ACC_GP25_BT_SPI_DAT1
ACC_GP26_BT_SPI_CLK
ACC_PCM_CLK
ACC_PCM_SYNC
ACC_PCM_DLD
ACC_PCM_ULD
VDDE_1V8
ACC_GP14_BT_SPI_INT
BT_CLKREQ_n
VDDK_2V75 VDDE_1V8
C106 C107 C108 C109
0.22u 0.22u 0.22u 0.1u
VSS_BT_ANA
• Clock
- Clock request
→ Connected to CLKREQ of DB3150 and AB3000, input to RF3000
- Fast clock : 26MHz
→ Supplied MCLK from RF3000
→ Frequency deviation : ± 20ppm
- Low power clock : 32.768kHz
→ Supplied RTCCLK from AB3000
• Power - Supplied 2.75V, 1.8V from internal regulators of AB3000
• Reset - RESOUT2_n signal of DB3150 controls STLC2500C reset.
• SPI
- Connected to SPI of DB3150
- HCI interface between DB3150 and STLC2500C
• PCM - Audio signal interface between DB3150/AB3000 and STLC2500C
• ANT - 2.4GHz, 50 ohm matching
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
U101 STLC2500C
D3
RESET_N
D6
REF_CLK_IN
G3
LP_CLK
CLK_REQ_OUT_1
C5
BT_WAKEUP
F5
UART_RXD UART_TXD
G4
UART_CTS UART_RTS
D1
PCM_CLK
C2
PCM_SYNC
D2
PCM_A
E1
PCM_B
B3
GPIO_16
C3
GPIO_8
B1
GPIO_9
C1
GPIO_10
D5
GPIO_0
E6
CLK_REQ_IN_1
G6
CLK_REQ_IN_2
F7
HOST_WAKEUP
E2
CONFIG_1
F2
CONFIG_3
F1
CONFIG_2
G7
CLK_REQ_OUT2
A6
TOUT_IP_QN
B5
TOUT_IN_QP VSS_DIG1
VSS_DIG2
G2
VDD_D
VSS_BT_ANA
G5
VDD_IO_A
F3
VDD_IO_B
R124 0
E7
VDD_CLD
VSS_ANA1
A7
VDD_HV_A VSS_ANA2
VSS_ANA3
G1
VDD_HV_D
B7
VDD_DSM
C7
VDD_N
D7
VDD_CL
A1
VDD_RF
Bluetooth
C110 C111 C112 C113
0.22u 0.1u 0.1u 0.22u
VSS_BT_RF
Figure 3-1-11. Schematic of STLC2500C
- 39 -
3. TECHNICAL BRIEF
C4
F6
ACC_GP24_BT_SPI_DAT0
F4
ACC_GP23_BT_SPI_CS0n
B2
GPIO_11
A2
VSS_RF1
A5
VSS_RF2
VSS_BT_RF
A3 FL100 DEA212450BT-7043C1
RFP
A4 5 1
RFN BP1 U_BP
4 2
BP2 BP_DC
E3
E4
VSS_BT_RF
B4
B6
C6
VSS_BT_ANA
E5
AF_PRG
ANT100 AMAA802012LG09
GND1
C105 100p
FEED GND2
L100 L101
NA NA
VSS_BT_RF
VSS_BT_RF VSS_BT_RF
LGE Internal Use Only