AT91EB55 datasheet(15/37 Pages) ATMEL

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AT91EB55 Evaluation Board User Guide

5-1

Section 5

Appendix A – Configuration Straps

5.1

Configuration

Straps (CB1 – 15,

JP1 – 9)

By adding the I/O and EBI expansion connectors, users can connect their own peripher-

als to the evaluation board. These peripherals may require more I/O lines than available

while the board is in its default state. Extra I/O lines can be made available by disabling

some of the on-board peripherals or features. This is done using the configuration straps

detailed below. Some of these straps present a default wire (notified by the default men-

tion) that must be cut before soldering the strap.

CB1

On-board NCS4 Signal

Closed

(1)

NCS4 signal is connected to the EBI expansion connector (P1 – B21)

Open

NCS4 signal is not connected to the EBI expansion connector (P1 – B21).

This authorizes users to connect the EBI expansion connector of this board to

the MPI expansion connector of an AT91EB63 evaluation board without conflict

problems.

CB2

ADC0 Trigger Input Command

Closed

(1)

ADC0 trigger input (AD0TRIG) is controlled by the PA4 PIO line.

Open

ADC0 trigger input (AD0TRIG) is not connected to the PA4 PIO line. This

authorizes users to connect the corresponding lines to their own resources via

the I/O expansion connector.

CB3

ADC1 Trigger Input Command

Closed

(1)

ADC1 trigger input (AD1TRIG) is controlled by the PA7 PIO line.

Open

ADC1 trigger input (AD1TRIG) is not connected to the PA7 PIO line. This

authorizes users to connect the corresponding lines to their own resources via

the I/O expansion connector.

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