Altera Cyclone V GT FPGA Development Board Manual de usuario descargar pdf (Pagina 29)

Chapter 2: Board Components 2–21

General User Input/Output

September 2014 Altera Corporation Cyclone V GT FPGA Development Board

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 S1, S2, and S3 are push buttons for controlling the FPGA designs that

loads into the Cyclone V GT 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.

Samtec HSMC

HSMB_CLK_IN0

2.5-V A22

Single-ended input from the installed HSMC cable

or board.

HSMB_CLK_IN_P1

LVDS/2.5-V K25

LVDS input from the installed HSMC cable or

board. Can also support 2x LVTTL inputs.

HSMB_CLK_IN_N1

LVDS/LVTTL J25

HSMB_CLK_IN_P2

LVDS/LVTTL J20

LVDS input from the installed HSMC cable or

board. Can also support 2x LVTTL inputs.

HSMB_CLK_IN_N2

LVDS/LVTTL K19

PCI Express

Edge

PCIE_REFCLK_P

HCSL W11

HCSL input from the PCI Express edge connector.

PCIE_REFCLK_N

HCSL V10

Table 2–12. Off-Board Clock Inputs (Part 2 of 2)

Source

Schematic Signal

Name

I/O Standard

Cyclone V GT

Pin Number

Description

Table 2–13. Off-Board Clock Outputs

Source

Schematic Signal

Name

I/O Standard

Cyclone V GT

Pin Number

Description

LVDS SMA

CLKOUT_SMA_P

LVPECL —

Driven from LVDS clock buffer U3

CLKOUT_SMA_N

LVPECL —

Samtec HSMC

HSMA_CLK_OUT0

2.5V CMOS F10 FPGA CMOS output (or GPIO)

HSMA_CLK_OUT_P1

LVDS/2.5V CMOS C1

LVDS output. Can also support 2x CMOS

outputs.

HSMA_CLK_OUT_N1

LVDS/2.5V CMOS B1

HSMA_CLK_OUT_P2

LVDS/2.5V CMOS B18

LVDS output. Can also support 2x CMOS

outputs.

HSMA_CLK_OUT_N2

LVDS/2.5V CMOS A18

Samtec HSMC

HSMB_CLK_OUT0

2.5V CMOS D25 FPGA CMOS output (or GPIO)

HSMB_CLK_OUT_P1

LVDS/2.5V CMOS L22

LVDS output. Can also support 2x CMOS

outputs.

HSMB_CLK_OUT_N1

LVDS/2.5V CMOS K22

HSMB_CLK_OUT_P2

LVDS/2.5V CMOS F26

LVDS output. Can also support 2x CMOS

outputs.

HSMB_CLK_OUT_N2

LVDS/2.5V CMOS G26

SMA

SMA_CLKOUT

2.5V CMOS AF33 FPGA CMOS output (or GPIO)

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 65 66

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