Table of Contents
Advertisement
4. TROUBLE SHOOTING
4.18 Bluetooth trouble
Bluetooth control signals are generated by STN8810.
Those signal's path are : STN8810 → AP_VDD_IO_1.8V and AP_VDD_BT_2.7V is asserted →
CLK32K is asserted → Bluetooth ON → BT_RESETN is High CLK_REQ_OUT_1 is High →
REF_CLK_IN is asserted → transmit/receive data/control through UART → transmit/receive voice data
through PCM I/F
AP_VDD_BT_2.7V
X400
BT_RESETN
X400 CSC3M192000EEVRS00
4
3
VDD
OUT
1
2
TRI_OPEN
GND
19.2MHz
C401
0.1u
UTXD0
URTS0N
PCMCLK
PCMSYNC
PCMDATAIN
PCMDATAOUT
AP_VDD_BT_2.7V
AP_VDD_IO_1.8V
LGE Internal Use Only
U401
TP400
D3
RESET_N
D6
REF_CLK_IN
G3
CLK32K
LP_CLK
CLK_REQ_OUT_1
C5
BT_WAKEUP
F5
UART_RXD
G4
UART_CTS
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
R401
E2
CONFIG_1
0
F2
CONFIG_3
F1
CONFIG_2
G7
CLK_REQ_OUT2
A6
TOUT_IP_QN
B5
TOUT_IN_QP
G2
VDD_D
G5
VDD_IO_A
F3
VDD_IO_B
E7
VDD_CLD
0
A7
VDD_HV_A
R715
G1
VDD_HV_D
B7
VDD_DSM
C7
VDD_N
D7
VDD_CL
A1
VDD_RF
Figure. Schematic of Bluetooth Interface
PON
STLC2500C
C4
F6
UART_TXD
F4
UART_RTS
B2
GPIO_11
A2
VSS_RF1
FL400
A5
VSS_RF2
DEA212450BT-7043C1
A3
RFP
5
A4
RFN
BP1
4
BP2
E3
VSS_DIG1
E4
VSS_DIG2
B4
VSS_ANA1
B6
VSS_ANA2
C6
VSS_ANA3
E5
AF_PRG
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 152 -
AP_+VPWR
U400
U400
MIC5219-2.7YM5
1
5
IN
OUT
2
GND
3
4
EN
BYP
C402
1u
URXD0
UCTS0N
ANT400
FL400
ANT400
NC1
R404
1
U_BP
FEED
NC2
0
2
BP_DC
R404
Only for training and service purposes
AP_VDD_BT_2.7V
C403
C400
470p
33u
Advertisement
Table of Contents
