Datasheet

Page 32
Page 33
C32
100nF
C33
100nF
VCC-3.3
R12
10K
R13
10K
VCC-3.3
1 2 3
J1
ACC ADDRESS
1
2
3
VCC
GND
Res
4
GND
5
GND
6
VCC
7
CS
8
INT1
9
INT2
10
NC
11
Res
12
ADD
13
SDA
14
SCL
U9
ADXL345
VCC-3.3
VCC-3.3
VCC-3.3
SCL1-RG2
SDA1-RG3
VCC-3.3
VREF-1.8
C31
22pF
C30
22pF
X3
32.768KHz
C2
22pF
C1
22pF
X1
8MHz
E9
10uF
SDA1-RG3
SCL1-RG2
SOSCO
SOSCI
CLKO
CLKI
30 29 28 27 34 33
58
57
56
55
54
53
52
46 36 35 42 43 44 45 37 50
9
48 49
11
12
32
72
69
68
67
66
65
64
63
4
3
78 77
24
23
18
17
16
15
14
13
5
6
7
8
10
79 80
1
2
22
21
20
19
62
61
60
59
38 39 40 41 47
71
31
51
70
26
25
76
75
74
73
dsPIC33FJ256GP710A
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
RB11 RB10/AN10 RB9/AN9 RB8/AN8 RB13 RB12
RE7
RC1
RC2
RC3
RA15
SCL1/RG2
RB15 RB14
SDO1/RF8
SDI1/RF7
SCK1/RF6
SDA1/RG3
GND VCC
RA6
RG0 RG1
RE0
RF1
RF0
RD7 RD6
RE6
RE5
RE2
RG13 RG12 RG14
RE1
RA7
RG8/SDO2
RA9/Vref-
RB1
RB2/AN2
RB3
RB4
RB5
RA13
RD9
RD8
U1RX/RF2
U1TX/RF3
GND
RG7/SDI2
RG6/SCK2
RA1
RE3 RE4
RG15
VCC
RB7/PGED1
RB6/PGEC1
RB0
RF4
RF5
RA14
RA5
RD14 RD15
RA2
RF13
VCC
RA3
VCC
VCC
RA12
RA0
VCC
GND RF12
RA4
GND
VCAP
AGND AVCC RA10/Vref+
MCLR
RC4
CLKI/RC12
CLKO/RC15
RD10
RD3
RD1
SOSCI/RC13
SOSCO/RC14
GND
RD2
RD12 RD13
RD4 RD5
RG9
RD11
RD0
U1
C5
100nF
C6
100nF
C7
100nF
E8
10uF
VCC-3.3
VCC-3.3
VCC-3.3VCC-3.3
C8
100nF
VCC-3.3
decoupling capacitors
10. Accelerometer
On board ADXL345 accelerometer is used to
measure acceleration in three axis: x, y and z. The
accelerometer’s function is dened by the user in the
program loaded into the microcontroller. Communication
between the accelerometer and the microcontroller is performed
via the I
2
C 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