Schematics

AC6969
OFF/ON
C
3
1
0
5
1
CHG
2
GND
3
BAT
4
VCC
5
PROG
U2
LP4054
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
B+
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
U3
Y1
24MHZ
C6
105
C2
105
C5
105
1
B-
1
2
C
4
1
0
5
C1
2.7P
1
DP
1
DM
C
9
1
0
5
12
LED1
BLUE
R7
1K
C
1
1
1
0
6
C12
105
R1
100K
1
SP+
1
SP-
R6
12K
1
SD
2
BYP
3
MODE
4
INN
5
VON
6
V
C
C
7
G
N
D
8
VOP
9
PG
U1
LTK5128
C10
223
R15
24K
R4
100K
1
B
2
E
3
C
Q2
8550
1
G
2
S
3
D
Q1
3401
R5
1K
R8
10K
R9
10K
R128
1K
R
1
2
9
4
7
K
1
G
2 S
3
D
Q3
3400
R10
10R
1
L2+
1
L1+
1
L1-
1
L2-
1
A
2
B
3
C
4
G1
5
G2
6
G3
7
G4
S1
1
V
1
GND
R
1
1
0
R
R12
47R
R
1
3
0
R
1
2
L
E
D
3
1
2
L
E
D
4
BAT
BT_OSCI
BT_OSCO
BT_OSCI BT_OSCO
3.3V
VMCU
DACL
FLED
LEDEN
L2
BLED
MUTE
VMCU
VMCU
DACL
BLED
MUTE
VMCU
LEDEN
VMCU
LEDV
BAT
VMCU
LEDA
LEDB

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