Altera Arria V GX Starter Board - Manual (Page 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
U4
Programmable LVDS
quad-clock 125M, 409.6M,
156.25M, 100M defaults
Silicon Labs Si5338A-A01343-GM www.silabs.com
X1
148.50 MHz LVDS voltage
controlled crystal oscillator
Silicon Labs 571FDB000159DG www.silabs.com