Altera Cyclone V GX FPGA Development Board - Manual (Page 28)

2–20 Chapter 2: Board Components
General User Input/Output
Cyclone V GX FPGA Development Board May 2013 Altera Corporation
Reference Manual
Table 2–13 lists the clock outputs for the development board.
General User Input/Output
This section describes the user I/O interface to the FPGA, including the push buttons,
DIP switches, LEDs, and character LCD.
User-Defined Push Buttons
The development board includes three user-defined push buttons. For information on
the system and safe reset push buttons, refer to
“Setup Elements” on page 2–16 .
Board references S3, S4, and S5 are push buttons for controlling the FPGA designs that
loads into the Cyclone V GX device. When you press and hold down the switch, the
device pin is set to logic 0; when you release the switch, the device pin is set to logic 1.
There are no board-specific functions for these general user push buttons.
Table 2–14 lists the user-defined push button schematic signal names and their
corresponding Cyclone V GX device pin numbers.
User-Defined DIP Switch
Board reference SW2 is a four-pin DIP switch. This switch is user-defined and
provides additional FPGA input control. When the switch is in the OFF position, a
logic 1 is selected. When the switch is in the ON position, a logic 0 is selected. There
are no board-specific functions for this switch.
Table 2–13. Off-Board Clock Outputs
Source
Schematic Signal
Name
I/O Standard
Cyclone V GX
Pin Number
Description
Samtec HSMC HSMA_CLK_OUT0 2.5V CMOS J19 FPGA CMOS output (or GPIO)
Samtec HSMC
HSMA_CLK_OUT_P1 LVDS/2.5V CMOS B26
LVDS output. Can also support 2x CMOS
outputs.
HSMA_CLK_OUT_N1 LVDS/2.5V CMOS A26
Samtec HSMC
HSMA_CLK_OUT_P2 LVDS/2.5V CMOS A25 LVDS output. Can also support 2x CMOS
outputs.
HSMA_CLK_OUT_N2 LVDS/2.5V CMOS A24
SMA CLKOUT_SMA 2.5V CMOS F9 FPGA CMOS output (or GPIO)
Table 2–14. User-Defined Push Button Schematic Signal Names and Functions
Board Reference
Schematic Signal
Name
Cyclone V GX Pin
Number
I/O Standard Description
S3 USER_PB0 AF29 1.5-V
User-defined push buttons S4 USER_PB1 AF30 1.5-V
S5 USER_PB2 AE28 1.5-V