Schematics

6963
MCU CHRAG
SPK
MIC
±
LED
TOUCH
BT_RF
BTOSCO
GND DP
DC_5V P/P/POWER
BTOSCO
BTOSCI
GND
DM
BTOSCI
DACR
DACL
DVDD
DC_5V
BAT+
AGND 3.3V MIC
L/R_DET
LED_B/R
BT_AVDD
DM BAT+
DPBT_RF
GND
MIC
3.3V
LED_B/R
LR_SEL
DACL
DACR
P/P/POWER
3.3V BAT+ DC_5V BT_AVDD DVDD
BAT+
DC_5V
3.3V
B-
B-
1
L6
120NH
C5222 C4105
GND GND
1
L2 0R
ANT1
3216
B+
B+
1
C9104
L1
NC
C11 15P
D1 B
C7NC
D2 R
L-
L-
1
L7
120NH
U1
AC
DACL
1
DACR
2
PB7/ADC9
3
PB6/ADC8
4
PB4/ADC7
5
LDO_IN/PB5
6
VBAT
7
BT_AVDD
8
PB1/ADC5
9
BT_RF
10
VSSIO
11
BT_OSCI
12
BT_OSCO
13
DVDD
14
PC1/USBDM
15
ADC4/PA6/USBDP
16
MIC_BISA/PA2
17
ADC1/MIC/PA1
18
VDDIO
19
DACVSS
20
PAD
0
BAT BAT
1
C12 15P
U2
VM6233
QC/QD
1
GND
2
TCH
3
AHLB
4
VDD
5
TOG
6
R1 0R
L+
L+
1
DC+DC+
1
C6105
T1
T1
1
L3
0.5P
DM DM
1
Y1
24MHZ
1
32
4
L56.8P
TAP1
C3105
SW1
SW
3 4
1 2
DP DP
1
DC-
DC-
1
C2105