Schematics
AC6969
R10
LED2
C
3
1
0
5
1
CHG
2
GND
3
BAT
4
VCC
5
PROG
U2
R
2
3
.
6
K
1 2
LED2
RED
R3
1K
1
VCC
2
D-
3
D+
4
ID
5
GND
1
0
1
1
6 7
1
4
J1
1
X1
R6
8.2K
C10
105
C
1
1
1
0
6
C12
105
R7
100K
1
X3
1
X4
R4
56K
C7
223
1
SD
2
BYP
3
MODE
4
INN
5
VON
6
V
C
C
7
G
N
D
8
VOP
9
PG
U1
HAA2018A
1
LDO_IN/PB5
2
VBAT
3
VDDIO
4
PB1/ADC5
5
FMIP
6
BT_RF
7
BT_OSCI
8
BT_OSCO
9
ADC12/SD0CLK/PC5
10
ADC11/SD0CMD/PC4
11
ADC14/SD0DAT/PC3/USBDM
12
ADC3/PA4/USBDP
13
PA1/PA0
14
VSSIO
15
VCOM
16
DACL
U121
Y1
24MHZ
C6
105
C2
105
C5
105
1
X2
1
2
C
4
1
0
5
1
A
2
B
3
C
4
G1
5
G2
6
G3
7
G4
S2
C1
2.7PF
C8
NC
R1
NC
R5
100K
R8
10K
R9
10K
R10
10K
1
2
3
4
5
S1
N
P
C
-
5
P
-
2
.
0
1
DP
1
DM
1
V
1
GND
1
G
N
D
2
O
U
T
3
IN
U4
C
9
1
0
5
1
2
3
Q3
9014
R11
10K
12
LED5
1
2
3
Q2
9014
10K
12
LED4
1
2
3
Q1
9014
R18
10K
12
1
2
3
4
5
S3
N
P
C
-
5
P
-
2
.
0
12
LED3
12
LED6
12
LED7
BAT
MUTE
VMCU
VMCU
DACL
BT_OSCI
BT_OSCO
BT_OSCI BT_OSCO
3.3V
VMCU
DACL
MUTE
LED
BAT
VMCU
VMCU
L4
L3
L2
VMCU
L3
L2