Altera Arria GX Development Board - Manual (Page 27)

Altera Corporation Reference Manual 2–17
October 2007 Arria GX Development Board
Board Components
General User
Interfaces To allow you to fully leverage the I/O capabilities of the Arria GX device
for debugging, control, and monitoring purposes, the following general
user interfaces are available on the board:
■ Push buttons
■ User DIP switch
■ User LEDs
■ Board-specific DIP switch
■ Board-specific LEDs
■ Status LEDs
Push Button Switches (S1, S2, S4)
Board references S1, S2, and S4 are push-buttons allowing general user
I/O interfaces to the Arria GX device.
The push buttons connect directly to user I/O pins for user
programming. Although the USER_RESET push button’s purpose is
programming, its special label is intended to encourage its use as a logic
reset signal for FPGA designs so that user designs are reset in a consistent
manner.
1 All push buttons are a logic 1 until depressed.
Table 2–13 lists the board references, schematic signal names and
corresponding Arria GX pin numbers.
125 MHz oscillator (X2) HSMA_REFCLK1_P LVDS J1
HSMA_REFCLK1_N J2
Notes to Table 2–12 :
(1) Select between using the 100 MHz oscillator or the SM_CLK using CLK_SEL on the configuration DIP switch (S6).
Pin 7 in the 0n position selects SMA_CLK.
(2) CLK2_P and CLK2_N are connected to TP3 and TP4 respectively.
Table 2–12. Arria GX Development Board Clock Distribution (Part 2 of 2)
Source
Schematic
Signal Name
I/O Standard
Arria GX Pin
Number
MAX II Pin
Number
Table 2–13. Push-Button Switch Signal Names and Functions (Part 1 of 2)
Board Reference
Schematic
Signal Name
Arria GX Pin Number
S1 USER_PB0 A19