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Page 21
R8
10K
VCC-3.3
C3
100nF
T1
BUTTON
T2
BUTTON
RST
VCC-3.3
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
C2
22pF
C1
22pF
X1
32.768kHz
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
ATxmega128A1
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PE0
VCC
GND
PD7
PE7
PE6
PB0
PB1
PB2
PB3
PJ4
PJ3
PJ2
PH2
VCC
GND
GND
VCC
PH0
PH1
PF
0
PF
1
XTA
L2/PR
0
RESET/PDI
PDI
GND
PQ3
PQ2
GND
VC
C
AVCC
GND
PA3
PA2
PA1
PA0
AV
CC
XTA
L1/PR
1
PB7
PD3
GND
PC7
PC6
PC5
PC4
PC3
PJ6
PJ5
PF7
PF6
VCC
PB6
PB5
PE3
PA4
PA5
PA6
PA7
PD2
PD1
PD0
VCC
PF
4
PF
5
PJ1
PH6
PF
2
PF
3
PH3
PE4
PE2
PH4
PH7
TOSC2/PQ1
PC2
PC1
PC0
PE1
PE5
PH5
PJ0
TOSC1/PQ0
PD6
PD5
PD4
GND
PB4
GND
VCC
PJ7
PK3
PK1
GND
VCC
PK0
PK2
PK4
PK5
PK6
PK7
U1
C35
100nF
VCC-3.3
AVCC
PQ1/TO
SC2
PQ0/TO
SC1
R7
100
RST
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
HDR2
M1X26
VCC-3.3
RST
Figure 4-3: Reset circuit schematic