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Chapter 9. Headers
9.1. Extension Headers
Table 9-1 to Table 9-4 show the microcontroller pin headers and their corresponding microcontroller connections. The
header pins connect directly to the microcontroller pin.
JN1 Extension Header
Pin
1
3
5
7
9
11
13
15
17
19
21
23
25
5VCC
3VCC
AVCC
AVREF
AN0
AN2
NC
PB9
PE1
PE3
PD22
NC
SDA
Circuit Net Name
MCU Pin
-
-
142, 145
143, 144
138
140
-
53
1
3
83
-
111
Pin
2
4
6
8
10
12
14
16
18
20
22
24
26
Ground
Ground
AGND
PD17
AN1
AN3
NC
RXD1
PE2
PA6
PDX21
NC
SCL
Circuit Net Name
MCU Pin
-
-
137, 150
78
139
141
-
11
2
103
82
-
110
Table 9-1: JN1 Extension Header
20
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