Schematics

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
C3 224
C5 225
C4 106
C12
475
C6 NC
GND
L1
10uH
GND
PWRKEY
L2
0R
L3
NC
L4
NC
GND GND
1 2
BT-ANT1
ANT
GND
Y1 26MHz
C9
NC
GND
GND
MICIN
BLUE_LED
CHRG_LED
DACL
DACL#
C2 104 C1 105
AB5376A_QFN20
VDDBT
VUSB
VDDIO
VBAT
GND
MICIN
R2
6K8
C11
104
+
M1
VDDDAC
C13
NC/102
LED3 BLUE
CHRG_LED
BLUE_LED
1
J4
L+
1
J5
L-
C15
15P
C14
15P
GND
GND
DACL
DACL#
R3
0R
VUSB
1
J7
VBAT
1
J8
GND
VBAT
GND
R6
0R
AGND
POWER LED DAC
MIC
VDDDAC
VDDBT
C10
105
OSCO
OSCI
1
J3
+5V
1
J6
GND
GND
E-GND
0
DACL
18
BT_OSCO
12
BT_OSCI
11
AGND
1
PWRKEY
8
DGND
6
VDDBT
7
LX
5
VDDDAC
19
ADC2/PA7
15
ADC6/PB4
13
ADC5/PB3
14
VDDBT
10
BT_ANT
9
VUSB
2
VDDIO
3
VBAT
4
ADC10/MIC/PF2
16
VCMBUF
17
VDDPA
20
*1
AB5376A
GND
R1
NC
LED1 RED
L5
1000R@1GHZ
L6
1000R@1GHZ
C18
33P