Users Manual
1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2022-04-18 Sheet of
File: C:\Users\..\Bluetooth Module.SchDoc Drawn By:
DVDD
1
GPIO26
8
NC
2
NC
3
NC
4
GPIO23
5
GPIO24
6
GPIO25
7
XTALIN
16
VIO
10
NC
11
I2C_SCL
12
I2C_SDA
13
VDDLPM
14
XTALOUT
15
GPIO5
24
SCANMODE
18
RFN
19
VPP
20
NC
21
GPIO3
22
GPIO4
23
WK_OPTION
32
GPIO8
26
NC
27
HVIN
28
HVOUT
29
NC
30
VIN
31
RSTN
9
ICE
17
GPIO6
25
U3
MT3540
2
3 4
1
OSC
22pF
C3
10nF
C5
1.5pF
C7
10nF
C2
1uF
C1
GND
GND
GND
GND
GND
22pF
C4
GND
10nF
C6
GND
S2
S1
S3
GND
D1
1K
R1
0.1uF
C8
10nF
C9
GND
Vo l
＋
Vol-
Home/App switcher
BAT+
BAT+
Y2 24Mhz
ANTENNA