Altera Cyclone II DSP Development Board - Manual (Page 20)

2–12 Reference Manual Altera Corporation
Cyclone II DSP Development Board August 2006
User Interfaces
User-Defined Pushbuttons (SW2 Through SW5)
SW2-SW5 are user-defined momentary-contact push-button switches
used to provide stimulus to a user design on the Cyclone II DSP
development board. Each push-button is connected to the EP2C70
general-purpose I/O pin as listed in
Table 2–5 . When the switch is
pressed and held down, the device pin is set to logic 0, when the switch
is released, the device pin is set to logic 1.
Figure 2–5 shows the
push-buttons.
Figure 2–5. User-Defined Pushbuttons
Table 2–5. User-Defined Push-Button Pin-Outs
Push-Button
Name
Board Reference
Schematic Signal
Name
Cyclone II (U12)
Pin Number
PB3 SW2 USER_PB3 AE14
PB2 SW3 USER_PB2 AE22
PB1 SW4 USER_PB1 AE16
PB0 SW5 USER_PB0 AC18
SW2
PB3
SW3
PB2
SW4
PB1
SW5
PB0