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Appendix A – Configuration Straps
5-6
1708C–ATARM–12-May-05
JP1
2-3
1-2
JP2
Open
Closed
JP3
Open
Closed
JP4
Closed
Open
JP8
2-3
1-2
User or Standard Boot Selection
The first half part of the Flash memory is accessible at its base address.
The second half part of the Flash memory is accessible at its base address.
This authorizes users to download their own application software in this part
and to boot on it.
Push Button Enabling
SW1-4 inputs to the AT91 are valid.
SW1-4 inputs to the AT91 are not valid. This authorizes users to connect the
corresponding PIO to their own resources via the I/O expansion connector.
User or Standard Boot Selection
The RS-232 transceivers are enabled.
The RS-232 transceivers are disabled. This authorizes users to connect the
corresponding PIO to their own resources via the I/O expansion connector.
PME Function (Protect Mode Enable)
The AT91M42800A is in Protect Mode.
This is the default mode on the AT91EB42. The AT91M42800A internal
registers are accessible in all processor modes.
Core Power Supply Selection
The AT91 core is powered by 3.3V power supply.
Not supported on the current microcontroller revision.
AT91EB42 Evaluation Board User Guide
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