Schematics

C
B
A
C
D
6 5 4 3 2 1
D
B
A
C3
105
1
PE7/ ADC9
2
AGND
3
PE0
4
VUSB
5
VDDIO
6
VBAT
7
DGND
8
VDDBT
16
DACL
15
DACR
14
ADC10/ MI CL/ PF2
13
ADC5/ PB3
12
BT_OSCO
11
BT_OSCI
10
BT_ANT
9
PWRKEY
U1
Y1
26 M
L1
0R
L2
NC
L3
NC
BT- ANT
ANTENNA_PIFA
D1
BLUE
C4
NC
D2
RED
L+
L-
S1
POWER/ PP/ P HONE
1
+
2
-
M1
DC+
DC-
VBAT
GND
R1
NC
VDDIO
VBAT
MICIN
OSCO
OSCI
BT_ANT
PWRKEY
+5V
PWRKEY
LED
VDDIO
LED
VUSB
VBAT
MICIN
AB5357T