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A
CIRCUIT DIAGRAM-MAIN BOARD
BT_3V3
BT_3V3
XP22
1
1
BT_UART_TX
1
2
2
BT_UART_RX
3
3
4
4
NC/4PIN/2.0mm
Uart0 Debug Interface
R342
BT_I2C_SDA
BT_I2C_SCL
2
3
STB_3V3
R1048 10K
R963
1K
8
Power_Off_Ready
4
A
B
BT MODULE CIRCUIT
R338
0
2
C210
C211
2
3
3
J3
RF_3P_2GNDS
TP54
BT_3V3
BT_3V3
C212
C213
10UF/6.3V/X5R
100pF/50V/NP0
R343
NC/4.7K
NC/4.7K
Debug/Upgrade interface
1
RF_3V3
BT_UART_TX
R344
33
2
BT_UART_RX
UART0_TX
R345
33
3
UART0_RX
4
I2C_DAT/UART1_TX
5
R1220
NC/0
I2C_SCL/UART1_RX
6
R1221
NC/0
GPIO_10
7
GPIO_22
8
U30
GPIO_07
9
GPIO_03
10
GPIO_02
11
GPIO_01
BT_WAKE
12
BM20IK
BT_WAKE
GPIO_00
TP2
BT_1.8V
13
I2S1_BCLK
VANA
R357
33
14
I2S1_DATA_OUT
I2S_CLK
R358
33
15
I2S_OUT
I2S_DATA4
16
R359
33
I2S_IN
I2S1_LRCLK
R360
33
17
I2S_ws
18
GND
BT_3V3
19
VBAT
20
VBAT_SENSE
C225
0.1uF/16V/X7R
TP24
TP25
R366
USB_D-
UART_TX
R369
NC/0
33
USB_D+
UART_RX
R370
NC/0
VREG_EN
C229
C230
15pF/50V/NP0
15pF/50V/NP0
TP27
ADC detect<1.2V
BT_3V3
R1157
NC/0
R382
Q39
NC/100K
TP3
BT_3V3
P_AP2305
8
VREG_EN
S
D
C240
C241
R386
C244
Q20
G
NC/N_2SK3018
NC/470K/1%
C245
0.1uF/16V/X7R
B
C
Party box200:R1262=0ohm
Party box300:R1262=NC
R1262
NC/0
54
GPIO35
53
LED2
52
LED1
51
GND
50
MIC4_P
49
MIC4_N
48
MIC3_P
47
MIC3_N
46
VMIC_1
45
MIC1_P
44
MIC1_N
43
VMIC_2
42
MIC2_P
41
MIC2_N
40
GND
39
SPK_RP
38
SPK_RN
37
SPK_LN
36
SPK_LP
35
GND
R368
33
C239
NC/0.22μF/25V/X7R
R387
NC/470K/1%
C
D
E
I2S_DATA4 8
I2S_DATA4
AD_DATA2 8
AD_DATA2
AD_DATA1 8
AD_DATA1
BT_I2C_SDA
BT_I2C_SDA
BT_I2C_SCL
BT_I2C_SCL
I2S1_LRCLK
I2S1_LRCLK
I2S1_BCLK
I2S1_BCLK
I2S1_DATA_OUT
I2S1_DATA_OUT
BT_UART_RX
BT_UART_RX
BT_UART_TX
BT_UART_TX
D
E
1
10
8
10
10
10
8,9
8,9
2
3
4
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