Hardware User Guide; Connectors; I/O Extension Headers - Atmel SAM4N Xplained Pro User Manual

4.

Hardware user guide

4.1

Connectors

This chapter describes the implementation of the relevant connectors and headers on SAM4N Xplained Pro
and their connection to the ATSAM4N16C. The tables of connections in this chapter also describes which
signals are shared between the headers and on-board functionality.
4.1.1

I/O extension headers

The SAM4N 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
2.54 mm.
Table 4-1. Extension header EXT1
Pin on EXT1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Table 4-2. Extension header EXT2
Pin on EXT2
1
2
3
4
5
6
7
8
9
Xplained Pro Standard Extension
SAM4N pin Function
- -
- -
PA17 AD0
PA18 AD1
PA24 GPIO
PA25 GPIO
PC23 TIOA3
PC24 TIOB3
PA0 WKUP0
PA23 GPIO
PA3 TWD0
PA4 TWCK0
PA21 RXD1
PA22 TXD1
PA11 NPCS0
PA13 SPI_MOSI
PA12 SPI_MISO
PA14 SPI_SCK
- -
- -
SAM4N pin Function
- -
- -
PA19 AD2
PA20 AD3
PC0 GPIO
PC1 GPIO
PC26 TIOA4
PC27 TIOB4
PA1 WKUP1
Header. All headers have a pitch of
Shared functionality
Communication line to ID chip on
extension board.
GND
SPARE HEADER2
SPARE HEADER2
SPARE HEADER2
EXT3
EXT3, SPARE HEADER1
EXT2, EXT3
EXT2, EXT3
EXT2, EXT3
GND
VCC
Shared functionality
Communication line to ID chip on
extension board.
GND
Atmel SAM4N Xplained Pro [USER GUIDE] 9
42104A-MCU-06/2013