Schematics

C18
2.4NH
L2
ESD
BT_OSCO
1
3
2
4
Y1
24M
BT_OSCI
L3
2.4NH
BT_RF
C8
C9
BA_AVDD
C16
+5V
PWKEY
BT_RF
BT_OSCO
BT_OSCI
USBDM
USBDP
MIC
DACL
DACR
VCOM
AK
D3
B
LEDB/R
AK
D4
R
LEDR
A
1
A4
A
1
A5
BAT+
C10
A
1
A3
DACR
A
1
A2
DACL
MIC
C5
NC
C4
NC
+3V3
R1
1K
+3V3
LEDB/R
BAT+
A
1
A8
A
1
A9
+5VA
1
A7
USBDMA
1
A6
USBDP
1 2
MIC3
MIC
VDDIO
1
VBAT
2
LDOIN
3
BT_AVDD
4
PB3/ADC6
5
PB1/ADC5
6
BT_RF
7
VSSIO
8
BT_OSCI
9
BT_OSCO
10
ADC_11/DM
11
MIC/ADC10/DP
12
DACR
13
DACL
14
AGND
15
ADC1/MIC/PA1
16
IC1
K1
3.3*3.3*1.5
PWKEY
ANT
1
2
P1
CON2
1 2
D2
NC
1 2
D1
NC
AC6969