Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
KEY
+5V
3.3V
3.7V
VDDDAC
B_LED
LED2
LED1
B_LED
KEY
R_LED
B_LED
R_LED
LED1
LED2
AGND
3.7V
AGND
+5V
AGND
AGND
VDDDAC
R1 6.8K
BT-ANT1
C7 NC
B-
S2
POW ER/PP
DACL+
BAT1
3.7V
12
D2 RED_LED
IC1
AB5335B
8 9 10
5
7
6
1
2
3
4
16
15
14
13
12 11
20 19
18
17
24 23 22 21 25
VDDBT PWRKEY BT_RFGND
VBAT
DGND
LX
AGND
PE7/ADC9
VUSB
VDDIO
ADC5/PB3
ADC6/PB4
BT_OSCO
BT_OSCI
BT_AVDD BT_ANT
DACR#
DACR
ADC10/MIC/PF2
ADC2/PA7
VDDDAC12
VDDDAC
VCMBUF/DACL#
DACL
E_GND
D5 LED
C8 2.7P
DACL-
C3 104
J1
USB2.0
6 7 8
9
5
4
3
2
1
6 7 8
9
D3 LED
K
DACR-
D6
LED
C5 104
C1104
D1 BLUE_LED
J2
MIC1
1
2
DACR+
D4
LED
S1
PREV/V-
L110UH
1 2
C2225
B+
R26.8K
Y1
26MHz
S3
NEXT/V+
R3
12K
C6 104
R5
47K
C10225 C11225