Digilent Genesys 2 Reference Manual page 22

Page 22 of 35
For more information, refer to the TUSB1210 datasheet and the USB 2.0 specifications
 
(http://www.ti.com/lit/gpn/tusb1210)
.
(http://www.usb.org/developers/docs/usb20_docs)
13. Basic I/O
The Genesys 2 board includes eight slide switches, six push buttons, and eight individual LEDs. The pushbuttons and slide
switches are connected to the FPGA via series resistors to prevent damage from inadvertent short circuits (a short circuit could
occur if an FPGA pin assigned to a pushbutton or slide switch was inadvertently defined as an output). The five pushbuttons
arranged in a plus-sign configuration are "momentary" switches that normally generate a low output when they are at rest, and
a high output only when they are pressed. The red pushbutton labeled "CPU RESET," on the other hand, generates a high
output when at rest and a low output when pressed. The CPU RESET button is intended to be used in processor designs to
reset the processor, but you can also use it as a general purpose pushbutton. Slide switches generate constant high or low inputs
depending on their position.