Schematics
1
1
2
2
3
3
4
4
5
5
6
6 7 8
D
C C
B B
A A
3.3V
+5V
1
2
3
4
5
6
CN1
R7
10K
ANT1
2.4G
WiFi-BLE
LED
MCU
2 1
MIC1
MIC
R20
4.7K
C26
1uF
VCC
VCC
C24
100nF
1
2
3 4
5
U3
LM321
R12
1K
R15
240K
C25
0.1uF
SOUND
R10
3.3K
R9
240K
VCC
R16
100K
C11
1.0PF/50V
L2
0.3NH/500mA
C6
1.0PF/50V
C17
104/6.3V
C23
104/6.3V
L3
3NH/500mA
C12
1PF/50V
P1
SMB
XI
1
GND
2
XO
3
GND
4
*1
Y-3225 SMD
C4
2.7PF/50V
C1
2.7PF/50V
TP3
3.3V
1
2
J1
24V
+24V
L1
4.7UH
R2
10K
C9
104
C10
106/35V
R3
49.9KFD1
M7F
C13
104
C14
47uF/10V
C15
47uF/10V
R24
16.2KF
BST
1
GND
2
FB
3
EN
4
IN
5
SW
6
U2
RY8310
C20
10nF
GND
C27
10uF
R21
100R
3.3V
1
2
3
1
IR_IN
VCCRXRE
1
ANT
2
VCCPA
3
VCCPAD
4
VCCIF
5
VSYS
6
VDDDIG
7
NC
8
VBAT
9
P28/ADC4/RXEN
10
P14/SD_CLK/SCK/ANT0
11
P16/SD_CMD/MOSI/ANT2
12
P15/CSN/ANT1
13
P17/SD_D0/MISO/ANT3
14
P26/ADC1/IRDA/PWM5
15
P24/ADC2/LPO_CLK/PWM4
16
P23/ADC3/TDO/F_SO
17
P22/ADC5/CLK_26M/TDI/TXEN/F_SI
18
P21/ADC6/I2C1_SDA/TMS/F_CSN
19
P20/I2C1_SCL/TCK/F_SCK
20
CEN
21
P6/CLK13M/PWM0
22
P7/WIFI_ACTIVE/PWM1
23
P8/BT_ACTIVE/PWM2
24
P9/BT_PRIORITY/PWM3
25
P10/DL_RX/UART1_RXD
26
P11/DL_TX/UART1_TXD
27
P1/UART2_RXD/I2C2_SDA
28
P0/UART2_TXD/I2C2_SCL
29
XI
30
XO
31
VCCPLL
32
33
33
U1
BK7231N
R5
18R
C5
105/6.3V
C8
1.2PF/50V
R1
0R
C7
0.5PF/50V
R4
0R
C19
4.7uF/50V
C212.2uF/50V
C18
4.7uF/50V
GND
3.3V
C224.7uF/50V
NC
NC
P28
P14
P16
P15
P17
PWM5
PWM4
SOUND
TDI_F_SI
TMS_F_CSN
TCK_F_SCK
CEN
PWM0
PWM1
PWM2
XO
XI
C2
105/6.3V
C3 105/6.3V
TP4
TP5
GND
3.3V
RX1
TX1
GND
3.3V
CEN
TP8
TMS_F_CSN
K1
GND
P9
P9
RX1
TX1
RX2
TX2
XI
XO
NC NC
NC
NC
R8
10K
RX2
DO
G
R
B
W
R6
10K
3.3V
IR_IN
GND