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 1. Extension Header EXT1
Pin on EXT1 SAM4E pin Function Shared functionality
1 - Communication line to ID chip on extension board  
2 - GND  
3 PB2 AFE AD0  
4 PB3 AFE AD1  
5 PA24 GPIO  
6 PA25 GPIO  
7 PA15 TIOA1  
8 PA16 TIOB1  
9 PA11 WKUP7  
10 PD25 GPIO  
11 PA3 TWD0 EXT2, EXT3, LCD connector, and EDBG
12 PA4 TWCK0 EXT2, EXT3, LCD connector, and EDBG
13 PA21 RXD1  
14 PA22 TXD1  
15 PB14 NPCS1  
16 PA13 MOSI EXT2 and EXT3
17 PA12 MISO EXT2 and EXT3
18 PA14 SPCK EXT2 and EXT3
19 - GNC  
20 - VCC  
Table 2. Extension Header EXT2
Pin on EXT2 SAM4E pin Function Shared functionality
1 - Communication line to ID chip on extension board  
2 - GND  
3 - -  
4 - -  
5 PE2 GPIO VBUS Sense and EDBG DGI
6 PB5 GPIO EDBG TRACESWO
7 PD21 PWMHI1  
8 - -  
9 PD29 GPIO ETHERNET
10 PB4 GPIO  
11 PA3 TWD0 EXT1, EXT3, LCD connector, and EDBG
12 PA4 TWCK0 EXT1, EXT3, LCD connector, and EDBG
13 PA5 URXD1 EXT3
14 PA6 UTXD1 EXT3
15 PD23 GPIO  
16 PA13 MOSI EXT1 and EXT3
17 PA12 MISO EXT1 and EXT3
18 PA14 SPCK EXT1 and EXT3
19 - GND  
20 - VCC  
Table 3. Extension Header EXT3
Pin on EXT3 SAM4E pin Function Shared functionality
1 - Communication line to ID chip on extension board  
2 - GND  
3 PA17 AD0  
4 PC13 AD6  
5 PD28 GPIO  
6 PD17 GPIO  
7 PD20 PWMH0  
8 PD24 PWML0  
9 PE1 GPIO  
10 PD26 GPIO  
11 PA3 TWD0 EXT1, EXT2, LCD connector, and EDBG
12 PA4 TWCK0 EXT1, EXT2, LCD connector, and EDBG
13 PA5 URXD1 EXT2
14 PA6 UTXD1 EXT2
15 PD30 GPIO  
16 PA13 MOSI EXT1 and EXT2
17 PA12 MISO EXT1 and EXT2
18 PA14 SPCK EXT1 and EXT2
19 - GND  
20 - VCC  
Parent topic: Connectors