Schematics

1
1
2
2
3
3
4
4
D D
C C
B B
A A
BTANT
Y1
24MHz
BT_OSCOBT_OSCI
0603
C6
2.7pF
BT_RF
SW3
NEXT/V+
VBUS
1
D-
2
D+
3
GND
4
G2
5
G1
6
USB1
GND GND
BLUETOOTH
MCU:AC6969A
MINIUSB
ADKEY
L1
NC
GND
AGND
GND
VDDIO
1
VBAT
2
LDO_IN
3
BT_AVDD
4
PB2/ADC12
5
PB1/ADC6
6
BT_RF
7
VSSIO
8
BT_OSCI
9
BT_OSCO
10
ADC11/USBDM
11
ADC10/PA3/USBDP
12
DACR
13
DACL
14
DACVSS
15
ADC0/MIC/PA1
16
U1
AC6969A
0603
C2
474/25V
0603
C3474/25V
0603
C4222/25V
0603
C5
105
MUTE
GND
L2
NC
GND
BT_RF
GND
BT_OSCI
BT_OSCO
DACL
+3.3V
VBAT
LDOIN
BT_ACDD
POWER
ADKEY
LED_BLUE
SD
1
BYPASS
2
MODE
3
IN
4
OUT-
5
VDD
6
GND
7
OUT+
8
U2 MIX2018A
SPK1
3W/4Ω
MUTE
0603
C10
0.1uF
0603
C9
105
GND
VBAT
MIX2018A
0603
C8
105
GND
0603
R7
43K
0603
R6
100K
VBAT
DACL
SW2
PREV/V-
SW1
PP/POWER
POWER
0603
R4
3K
0603
R3
22K
ADKEY
+3.3V
BT
GND
BTLED
LED2
RED
GND
LED_BlUE
LED1
RED
Q1
9015
GND
0603
R10
1K
0603
R9
1K
VBAT
VIN
D1
5819
0603
R1
2.7R/0805
VIN
VBAT
0603
R8 1K
VBAT
GND
GND
GND
GND
PI01
PI02
PI03
PI04
PI05
PI06
CO
PIBT01
PIBT02
COBT
PIBTANT01
COBTANT
PIC201
PIC202
COC2
PIC301
PIC302
COC3
PIC401
PIC402
COC4
PIC501
PIC502
COC5
PIC601
PIC602
COC6
PIC801
PIC802
COC8
PIC901 PIC902
COC9
PIC1001
PIC1002
COC10
PID101
PID102
COD1
PIL101
PIL102
COL1
PIL201
PIL202
COL2
PILED101
PILED102
COLED1
PILED201
PILED202
COLED2
PIQ101
PIQ102
PIQ103
COQ1
PIR101
PIR102
COR1
PIR301
PIR302
COR3
PIR401
PIR402
COR4
PIR601
PIR602
COR6
PIR701 PIR702
COR7
PIR801
PIR802
COR8
PIR901
PIR902
COR9
PIR1001
PIR1002
COR10
PISPK101
PISPK102
COSPK1
PISW101
PISW102
COSW1
PISW201
PISW202
COSW2
PISW301
PISW302
COSW3
PIU101
PIU102
PIU103
PIU104
PIU105
PIU106
PIU107
PIU108
PIU109
PIU1010
PIU1011
PIU1012
PIU1013
PIU1014
PIU1015
PIU1016
COU1
PIU201
PIU202
PIU203
PIU204 PIU205
PIU206
PIU207
PIU208
COU2
PIY101
PIY102
COY1