User manual

Evaluation Kit Hardware
SAM3N-EK Development Board User Guide 4-13
11080C–ATARM–30-Mar-11
4.4.4 Assigned PIO Lines, Disconnection Possibility
As pointed out in previous interface descriptions, 0-Ohm resistors have been inserted on the PIO lines
receiver path of the SAM3N-EK. Some PIO lines are connected to an external driver on the board. The
0-Ohm resistors allow disconnecting each of these for custom usage (through PIO expansion connec-
tors, for example). This feature gives the user an added level of versatility for prototyping a system of his
own. See the table below.
TP5 Ring Hook GND
TP6 Pad UTXD0
TP7 Pad URXD0
Table 4-5. Test Points (Continued)
Designation Part Description
Table 4-6. Disconnection Possibility
Designation Default Assignment PIO
R2 XIN PB9
R3 XOUT PB8
R9, R5 XIN32 PA7
R4, R10 XOUT32 PA8
R17 EN_LCD PC13
R39 URXD0 PA9
R40 UTXD0 PA10
R47 ZB_RSTN PC23
R48 IRQ1_ZBEE PC25
R49 IRQ0_ZBEE PC24
R50 SLP_TR PC26