Altera Arria V GX Starter Board Manual de usuario descargar pdf (Pagina 30)

2–22 Chapter 2: Board Components

Clock Circuitry

Arria V GX Starter Board November 2013 Altera Corporation

Reference Manual

Off-Board Clock Input/Output

The development board has input and output clocks which can be driven onto the

board. The output clocks can be programmed to different levels and I/O standards

according to the FPGA device’s specification.

Table 2–15 lists the clock inputs for the starter board.

Table 2–16 lists the clock outputs for the starter board.

Table 2–17 lists the crystal oscillators component references and manufacturing

information.

Table 2–15. Off-Board Clock Inputs

Source

Schematic Signal

Name

I/O Standard

Arria V GX

Pin Number

Description

SMA

CLKIN_SMA_P

LVPECL —

Input to LVDS fan-out buffer (drives one REFCLK)

CLKIN_SMA_N

LVPECL —

Samtec HSMC

HSMA_CLK_IN0

2.5-V AL5

Single-ended input from the installed HSMC cable

or board.

Samtec HSMC

HSMA_CLK_IN_P1

LVDS/2.5-V AN3

LVDS input from the installed HSMC cable or

board. Can also support 2x LVTTL inputs.

HSMA_CLK_IN_N1

LVDS/LVTTL AP2

Samtec HSMC

HSMA_CLK_IN_P2

LVDS/LVTTL C1

LVDS input from the installed HSMC cable or

board. Can also support 2x LVTTL inputs.

HSMA_CLK_IN_N2

LVDS/LVTTL C2

Samtec HSMC

REFCLK3_QR1_P

LVDS R9

LVDS input from the installed HSMC cable or

board.

REFCLK3_QR1_N

HCSL R8

PCI Express

Edge

PCIE_REFCLK_P

LVDS AA27

LVDS input from the PCI Express edge connector.

PCIE_REFCLK_N

HCSL AA28

Table 2–16. Off-Board Clock Outputs

Source

Schematic Signal

Name

I/O Standard

Arria V GX

Pin Number

Description

Samtec HSMC

HSMA_CLK_OUT0

2.5V CMOS AL6 FPGA CMOS output (or GPIO)

Samtec HSMC

HSMA_CLK_OUT_P1

LVDS/2.5V CMOS AD8

LVDS output. Can also support 2x CMOS

outputs.

HSMA_CLK_OUT_N1

LVDS/2.5V CMOS AC8

Samtec HSMC

HSMA_CLK_OUT_P2

LVDS/2.5V CMOS L9

LVDS output. Can also support 2x CMOS

outputs.

HSMA_CLK_OUT_N2

LVDS/2.5V CMOS M8

SMA

CLKOUT_SMA

2.5V CMOS C3 FPGA CMOS output (or GPIO)

Table 2–17. Crystal Oscillator Component References and Manufacturing Information

Board

Reference

Description Manufacturer

Manufacturer

Part Number

Manufacturer Website

Programmable LVDS

quad-clock 125M, 409.6M,

156.25M, 100M defaults

Silicon Labs Si5338A-A01343-GM www.silabs.com

148.50 MHz LVDS voltage

controlled crystal oscillator

Silicon Labs 571FDB000159DG www.silabs.com

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