Atmel AT91EB40A, User Manual

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5-2 AT91EB40A Evaluation Board User Guide
2635C–ATARM–13-May-05
CB4 Flash Reset (U1A)
Closed
(1)
The on-board reset signal NRST is connected to the Flash NRESET input.
Open The on-board reset signal NRST is not connected to the Flash NRESET
input.
CB5 Flash RDY/BUSY Pin (U1A)
Closed
(1)
The RDY/BUSY line of the Flash memory is connected to P10/IRQ1 pin.
Open The RDY/BUSY line of the Flash memory is not connected to P10/IRQ1 pin.
CB6 Push-button Enabling
Open
(1)
SW1 to SW4 inputs to the AT91 are valid.
Closed SW1 to SW4 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.
CB9 AT91 Master Clock Input
1 - 2 AT91 Master Clock input (MCKI) is connected to the on-board 66 MHz
oscillator.
2 - 3 AT91 Master Clock input (MCKI) is connected to the EBI_MCKI (B4) pin of
the EBI expansion connector. This authorizes the user to input an external
clock to the AT91.
CB10 Ground Link
Closed The electrical ground is connected to mechanical ground.
Open
(1)
The electrical ground is not connected to mechanical ground.
CB11 On-board Flash Memory Selection
1 -2 AT91 NCS0 select signal is connected to the Flash device U1A.
2 - 3 AT91 NCS0 select signal is connected to the Flash device U1B.
CB12 Flash Reset (U1B)
Closed
(1)
The on-board reset signal is connected to the Flash NRESET input.
Open The on-board reset signal is not connected to the Flash NRESET input.
CB15 Flash RDY/BUSY Pin (U1B)
Closed
(1)
The RDY/BUSY line of the Flash memory is connected to P10/IRQ1 pin.
Open The RDY/BUSY line of the Flash memory is not connected to P10/IRQ1 pin.