Schematics
MARK
Bluetooth
M1 M2
1
2
MIC1
L
E
D
3
蓝色
R3
M3
POWER
4*4*1.7MM
B1
BT_RF
M4
L
E
D
2
红色
SP+
SP-
R4
33K
C
8
1
0
4
C
7
1
0
5
1
PE7/ADC9
2
AGND
3
PE0
4
VUSB
5
VDDIO
6
VBAT
7
DGND
8
VDDBT
9
PWRKEY
10
BT_ANT
11
BT_OSCI
12
BT_OSCO
13
ADC5/PB3
14
ADC10/MICL/PF2
15
VCMBUF
16
DACL
U1
AB5357H
C
2
1
0
5
C
1
1
0
5
B+
B-
1
SHDN
2
PASS
3
+IN
4
-IN
5
VO-
6
VDD
7
GND
8
V0+
U2
IC_8002
R
3
0
5
K
1
C
6
0
104
R
6
0
R
R
1
1
0
0
K
G
+
5
V
V
O
L
-
4*4*1.7MM
R
1
3
8
2
0
K
P
/
P
4*4*1.7MM
R
5
1
5
0
K
V
O
L
+
4*4*1.7MM
R
2
4
7
K
C
A
L
L
4*4*1.7MM
R
8
1
2
k
Q1
8050
R
9
4
7
k
R
1
2
2
2
R
L
E
D
-
L
E
D
+
Y
1
26M
C
4
104
C
1
3
N
C
C
5
104
C
3
1
0
1
C
1
4
104
C
6
3
3
0
P
L
E
D
1
L
E
D
4
L
E
D
5
L
E
D
6
MIC
BTOSCO
BTOSCI
DACL
MIC
BTOSCO
BTOSCI
BT_RF
VBAT
DACL
CHRG_LED
VUSB
BT_RF
PWRKEY
MUTE
VDDIO
VBAT
L
E
D
W
VUSB
VBAT
MUTE
VBAT
VDDIO
LED
PWRKEY
LEDW
VBAT