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4. TROUBLE SHOOTING
4.7 BT Trouble
TEST POINT
U201
U203
CIRCUIT DIAGRAM
BLUETOOTH
2V8_VMEM
U203
MAX4717EBC-T
B4
V+
C2
PCM_EN
IN1
NO1
A2
IN2
NO2
C3
USC_1
COM1
NC1
A3
USC_2
COM2
NC2
GND
R203
B1
47K
VBAT
2V8_VBT
U200
VIN
VOUT
C3
C1
GND
B2
C200
0.01u
BYPASS
VEN
A3
A1
LP3985IBLX-2.8
C202
C203
1u
0.1u
(GPIO 8)
2V8_VBT
U201
C4
PCM_RX
TC7SH08FS
5
A4
1
VCC
PCM_TX
PCM_TX
C1
3
USC1
USC3
GND
2
A1
USC2
C216
0.1u
Figure 4-7
(GPIO 2)
BT_EN
C204
C205
1u
15p
16
_BT_RST
RESETB
C207
1
PIO0
2
NA
PIO1
7
PIO2
8
PIO3
9
U202
PIO4
10
PIO5
LBMA-2C67B2
C211
0.1u
28
NC
4
13
PCM_SYNC8
SPI_CLK
14
SPI_CSB
12
SPI_MOSI
15
SPI_MISO
- 76 -
U202
U200
ANT201
NC1
FEED
NC2
SNGF0016701
FL201
LFB212G45SG8A166
2V8_VBT
22
VDD_1_8V
21
L200
VDD_DIG
3
VDD_VREGIN
22nH
C208
C209
4
GND1
6
15p
2.2u
GND2
11
GND3
25
GND4
(GPIO 33)
27
UART_TX
DEBUG_RX
24
UART_RX
DEBUG_TX
23
(GPIO 34)
UART_RTS
26
UART_CTS
19
PCM_IN
PCM_TX
17
PCM_OUT
PCM_RX
18
PCM_SYNC
PCM_SYNC8
20
PCM_CLK
USC0
C210
2.2u
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