Specifications
Altera Corporation 19
EPXA1 Development Board Hardware Reference Manual
Switch Interfaces
The EPXA1 development board provides eight user-definable, active-low
switches in a dip-switch block, four debounced push-button switches, and
two dedicated reset switches. Table 10 documents the interface
characteristics of the dip-switch block, SW6.
Tables 11 and 12 detail the push-button switches on the development
board.
Table 10. SW6 Dip Switch Connections (Active-Low)
Switch Name EPXA1 I/O Pin Signal Voltage (V)
SW6_1 V20 USER_SW7 3.3
SW6_2 V19 USER_SW6 3.3
SW6_3 V18 USER_SW5 3.3
SW6_4 V17 USER_SW4 3.3
SW6_5 V16 USER_SW3 3.3
SW6_6 U21 USER_SW2 3.3
SW6_7 U20 USER_SW1 3.3
SW6_8 U19 USER_SW0 3.3
Table 11. Push-Button Switches
Push Button EPXA1 I/O
Pin
Signal Use Voltage
(V)
SW1 H1 NPOR Active-low switch that generates a full power-on reset
when pressed for more than two seconds
3.3
SW7 R4 N_CONFIG Active-low switch that generates a warm reset 3.3
Table 12. User-Definable Push-Button Switches
Push Button EPXA1 I/O Pin Signal Voltage (V)
SW2 U18 USER_PB0 3.3
SW3 U17 USER_PB1 3.3
SW4 U16 USER_PB2 3.3
SW5 T18 USER_PB3 3.3