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AT91SAM9XE-EK Evaluation Board User Guide 4-1
6311A–ATARM–04-Feb-08
Section 4
Configuration
4.1 Jumpers
Notes: 1. These jumpers are provided for power consumption measurement. By default, they are
closed. To use this feature, the user has to open the strap and insert an ammeter.
Table 4-1. Jumpers Configuration
Designation Default Setting Feature
J2 Closed 3.3V Jumper
(1)
J3 Closed
Forces power on.
To use the software shutdown control, J3 must be opened. 3V
battery backup must be present.
J6 Closed VDDPLL Jumper
(1)
J7 2-3
Erase/Normal operation mode
1-2: Erase entire flash chip
2-3 or open: Normal operating mode
J9 2 - 3
Slow Clock OSCSEL
1-2: Internal RC Oscillator
2-3: External Crystal Oscillator
J10 Closed VDDBU Jumper
(1)
J12 Closed VDDCORE Jumper
(1)
J15 Closed Enables Ethernet Auto MDIX control
J32 Closed Enables the use of the embedded NANDFLASH device (MN6xx)
J33 Closed Enables the use of the embedded DATAFLASH device (MN9)