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