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1
2
3
4
5
6
8
9
10
11
12
13
14
58
57
56
55
54
53
52
72
69
68
67
66
65
64
63
8
7
9
0
62
61
60
59
71
51
70
6
75
74
73
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
C32
100nF
C33
100nF
VCC-3.3
R12
10K
R13
10K
VCC-3.3
ACC ADDRESS
VCC
GND
Res
GND
GND
VCC
7
C
S INT1
INT2
NC
Res
ADD
SDA
SC
L
U9
ADXL345
VCC-3.3
VCC-3.3
VCC-3.3
VCC-3.3
AVCC
SD
A
1-
PB
7
SC
L1
-P
B6
SDA1-PB7
SCL1-PB6
1
2
3
J1
30
29
28
27
34
33
46
36
35
42
43
44
45
37
50
9
48
49
11
12
32
4
3
7
7
24
23
18
17
16
15
14
13
5
6
7
8
10
7
8
1
2
22
21
20
19
38
39
40
41
47
31
26
25
7
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
10
PE
11
PE
10
PE6
VBAT
PC13/TAMPER_RTC
PC14/OSC32_IN
PA10
PA9
PA8
PD9
PE
13
PE
12
PB13
PB14
PB15
PD8
PE
14
PE
15
PB
5
PB
4
PB
3
PB
7
PD
7
PD
6
PE5
PE4
PE
1
PE
0
PB
9
PB
8
BO
O
T0
PB
6
OSC_IN
PA0-WKUP
VDDA
VREF+
GNDA
VDD
PC3
PA12
PA11
PB12
PC8
NRST
VDD
GND
PE
7
PD
R
_O
N
(R
FU
)
VD
D
PE2
PE3
PA2
PA1
VC
A
P
VD
D
PC9
PD13
PB
10
PB
11
PD10
PE
8
PB
2
PD11
PD14
PD
5
PC2
PC1
PC0
PB
1
PE
9
PD12
PC7
OSC_OUT
PC15/OSC32_OUT
PD15
PC6
PA13
PC
10
PA
14
VCAP
GND
VDD
PA
15
PC
11
PC
12
PD
0
PA
6
PA
5
PC
4
PA
7
PC
5
PB
0
G
N
D
VD
D
PA
3
PA
4
PD
1
PD
2
PD
3
PD
4
U1
VREF-1.8
R65
100K
C41
2.2uF
C42
2.2uF
R66 100K
decoupling
capacitors
C5
100nF
C6
100nF
C7
100nF
C8
100nF
E8
10uF
VCC-3.3 VCC-3.3 VCC-3.3 VCC-3.3
VCC-3.3
C31
100nF
VCC-3.3
VCC-3.3
J3
J2
STM32F207VGT6
STM32F407VGT6
10. Accelerometer
On board
ADXL345
accelerometer is used to
measure acceleration in three axis: x, y and z. The
acceleromer’s function is defined by the user in the
program loaded into the microcontroller. Communication
between the accelerometer and the microcontroller is
performed via the
I2C
interface.
You can set the accelerometer
address to 0 or 1 by re-soldering the
SMD jumper (zero-ohm resistor) to the
appropriate position. Jumper is placed
in address 1 position by default.
Figure 10-2: Accelerometer
connection schematics
Figure 10-1:
Accelerometer
module