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SCH12 BT 02
From the page of MTK8502
MT_TX
BT_WAKE_8502
TO the page of MTK8502
MT_RX
SF CS
R42
33Ω
1
1
SF CK
R41
33Ω
2
2
SF DO
R40
33Ω
3
3
4
4
BT_CON
XP2
BT_CON
4pin/1.25mm
BT_RX
BT_STATES
BT_STATES
BT_WAKE_8502
Y7
Y6
Y5
BT_TX
SD_DAT
R7
33Ω
SD_CLK
R9
33Ω
SD_CMD
R11
33Ω
STB_5V
Q2
R12
10
NPN_3DG3904M
3.8v
R14
150
R15
C13
120
0.1UF
ZD1
BZV55C3V9
BT VDD
R220
NC/0
Q23
R219
C221
10K
0.1UF
R218
1K
Q20
R221
3DG3904M
10K
BT_PCON
BT_PCON
R976
47K
U1
C3
NC/33pF/50V/NP0
R2
1
16
AGND
SPI_CLK
2
17
33
BT_STATES
MICINR
SPI_SS
3
18
MICINL
GPIOB11
4
19
VRO
GND
BT_ANT
5
20
AOUTL
BT_ANT
R974
6
21
AOUTR
RTCVDD
BT_WAKE_8502
33
7
22
VRO_S
ONOFF
8
23
A_GND
BAT
R975
4.7K
BT_VCC
9
24
Y1
Y2
GND
GND
BT_VCC
10
25
VCC
DC5V
BT_RX
11
26
GPIOA21
GND
R4
33
SD_DAT
12
27
SPDIF_BT
GPIOA23
GND
BT_TX
13
28
SD_CMD
GPIOA22
AUX0R
14
29
GPIOA16
AUX0L
SF DO
15
30
SPI_MOSI
AVCC
2823
SF 3V3
FB2
500/200mA
BT_VCC
BT VDD
SF 3V3
C11
C12
0.1UF
R13
4.7K
0.1UF
Y3
U2
SF CS
1
8
CS
VCC
2
7
DO
HOLD
3
6
R16
33
WP
CLK
4
5
Y4
R17
GND
DI
GD25Q32C
C15
NC/10pF/50V/NP0
BT_3V6
20
CON2
RFB00
3
3
2
2
TP1
R39
NC/0
R1
0
BT_ANT
C1
C2
NC
NC
SF CK
SF CS
BT_3V6
SD_CLK
FB1
1K
500/200mA
C4
R5
1M
Q1
R6
3DG3904M
BT_CON
R10
47K
R8
560K
100K
SF 3V3
SF CK
33
SF DO
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