4.1.1 Xplained Pro Extension Headers

The SAM4E Xplained Pro headers EXT1, EXT2, and EXT3 offers access to the I/O of the microcontroller in order to expand the board e.g. by connecting extensions to the board. These headers all comply with the standard extension header specified in Xplained Pro Standard Extension Header. All headers have a pitch of 2.54mm.

Table 4-1. Extension Header EXT1
Pin on EXT1SAM4E pinFunctionShared functionality
1-Communication line to ID chip on extension board
2-GND
3PB2AFE AD0
4PB3AFE AD1
5PA24GPIO
6PA25GPIO
7PA15TIOA1
8PA16TIOB1
9PA11WKUP7
10PD25GPIO
11PA3TWD0EXT2, EXT3, LCD connector, and EDBG
12PA4TWCK0EXT2, EXT3, LCD connector, and EDBG
13PA21RXD1
14PA22TXD1
15PB14NPCS1
16PA13MOSIEXT2 and EXT3
17PA12MISOEXT2 and EXT3
18PA14SPCKEXT2 and EXT3
19-GNC
20-VCC
Table 4-2. Extension Header EXT2
Pin on EXT2SAM4E pinFunctionShared functionality
1-Communication line to ID chip on extension board
2-GND
3--
4--
5PE2GPIOVBUS Sense and EDBG DGI
6PB5GPIOEDBG TRACESWO
7PD21PWMHI1
8--
9PD29GPIOETHERNET
10PB4GPIO
11PA3TWD0EXT1, EXT3, LCD connector, and EDBG
12PA4TWCK0EXT1, EXT3, LCD connector, and EDBG
13PA5URXD1EXT3
14PA6UTXD1EXT3
15PD23GPIO
16PA13MOSIEXT1 and EXT3
17PA12MISOEXT1 and EXT3
18PA14SPCKEXT1 and EXT3
19-GND
20-VCC
Table 4-3. Extension Header EXT3
Pin on EXT3SAM4E pinFunctionShared functionality
1-Communication line to ID chip on extension board
2-GND
3PA17AD0
4PC13AD6
5PD28GPIO
6PD17GPIO
7PD20PWMH0
8PD24PWML0
9PE1GPIO
10PD26GPIO
11PA3TWD0EXT1, EXT2, LCD connector, and EDBG
12PA4TWCK0EXT1, EXT2, LCD connector, and EDBG
13PA5URXD1EXT2
14PA6UTXD1EXT2
15PD30GPIO
16PA13MOSIEXT1 and EXT2
17PA12MISOEXT1 and EXT2
18PA14SPCKEXT1 and EXT2
19-GND
20-VCC