Datasheet

Page 33
R87 100K
R86 100K
C107
2.2uF
C114 2.2uF
VCC-3.3V
Vbat_mcu
I2C1_SCL
I2C1_SDA
ACCEL-INT
OSC_IN
OSC_OUT
144 143
142
141 140 139 138 137 136 135 134 133 132
131 130
129 128
127 126 125
124 123 122
121 117 118 119
120
116 115 114
113 112
111
110
109
106
108
107
102
103
104
105
73
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
STM32F407ZG
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PA1
PA0
VDDA
VREF+
PA6
PA5
PE6
VBAT
PC13
PC14
PB10 PE15
PE14
PG0
PC4 PA7
VDD PF13
PF14
PF15 PC5 PB0
PG6
PG5
PG4
PG8
PG3
PG2
VDD
VSS
PE5
PE4
PC8
PC7
PC6
VDD
VSS
PG7
PF2
PC2
PH0
PF10
PF9
PF8
PF7
PF6
VCAP1
PB11 PE12
PF4
PF1
PF0
VSS
PC9
PA8
PE2
PE3
PC1
PC0
NRST
PH1
PF11 PF12 PE13 PE9
PB1
PB2 PG1 VDD PA3
PE7
VSS
PD15
VDD
VSS
PF5
PA2
PA4 PE8
PE11
PD14
VSSA
VDD
PC3
PF3
PC15
VDD PE10
VDD
PD9
PB15
PB12
PB13
PB14
PD8
PD10
PD11
PD12
PD13
PA9
PA11
VDD
VSS
VCAP2
PA13
PA12
PA10
PG12
PG11 PG10
PG14
PG9
PD7
VSS
PD5
PB4
PB3
PG15
VDD
VSS
PG13
PB5
PB6
PD6
VDD
PD0
PC11
PA14
PA15
PC10 PC12
PD1 PD2 PD3
PD4
PB7
PB8
VDD
PDR_ON
PE1 PE0
PB9
BOOT0
101
VSS
U18
BAT1
3000TR
OSC32_IN
OSC32_OUT
X5
25MHz
C111
22pF
C110
22pF
X4
32.768KHz
C108
10pF
C109
10pF
OSC32_IN
OSC32_OUT
OSC_IN
OSC_OUT
VCC-3.3V
VCC-3.3V
VCC-3.3V
C118 100nF
C123 100nF C124 100nF C125 100nF C126 100nF
C127 100nF
C130 10nF C131 1uF
C134 4.7uF
VCC-3.3V
C115 100nF
C116 100nF
C117 100nF
C119 100nF
C120 100nF
C121 100nF C122 100nF
C98
100nF
ACCEL-ADR
1
2
3
J3
VCC-3.3V
VCC-3.3V
ACCEL-INT
VCC-3.3V
ACCEL-INT
R66
10K
VCC-3.3V
8
10
9
11
12
13
14
1
2
3
4
5
6
7
VCC
GND
Res
GND
GND
VCC
CS
INT1
INT2
NC
Res
ADD
SDA
SCL
U14
ADXL345
C133
100nF
VCC-3.3V
I2C1_SDA
I2C1_SCL
I2C1_SDA
I2C1_SCL
Figure 11-2: Accelerometer connection schematic