Altera Stratix IV GX FPGA Development Board - Manual (Page 32)

2–24 Chapter 2: Board Components
Clock Circuitry
Stratix IV GX FPGA Development Board August 2012 Altera Corporation
Reference Manual
X7 CLK_155_P J38 LVPECL
155.52 MHz oscillator which drives the
transceiver reference clock input with 100
Ω
OCT.
X8 CLKIN_50 AC34 2.5-V CMOS
50 MHz oscillator which drives the global
clock input.
SMA or X6
CLKINTOP_100_P A21
LVDS
100 MHz programmable oscillator which
drives the fan-out buffer U50 and LVDS input
to the top edge PLL input.
CLKINTOP_100_N A20
CLKINBOT_100_P AV22
LVDS
100 MHz programmable oscillator which
drives the fan-out buffer U50 and LVDS input
to the top edge PLL input.
CLKINBOT_100_N AW22
CLKINRT_100_P G2
LVDS
100 MHz programmable oscillator which
drives the fan-out buffer U50 and LVDS to the
transceiver QR2 REFCLK input.
CLKINRT_100_N G1
CLKINLT_100_P G38
LVDS
100 MHz programmable oscillator which
drives the fan-out buffer U50 and LVDS to the
transceiver QR2 REFCLK input.
CLKINLT_100_N G39
Samtec HSMC HSMA_CLK_IN0 AB34 LVTTL
Single-ended input from the installed HSMC
cable or board.
Samtec HSMC
HSMA_CLK_IN_P1 AC6
LVDS or LVTTL
LVDS input from the installed HSMC cable or
board. Can also support two LVTTL inputs.
HSMA_CLK_IN_N1 AC5
Samtec HSMC
HSMA_CLK_IN_P2 AF6
LVDS or LVTTL
LVDS input from the installed HSMC cable or
board. Can also support two LVTTL inputs.
HSMA_CLK_IN_N2 AE5
Samtec HSMC HSMB_CLK_IN0 AA35 LVTTL
Single-ended input from the installed HSMC
cable or board.
Samtec HSMC
HSMB_CLK_IN_P1 AB6
LVDS or LVTTL
LVDS input from the installed HSMC cable or
board. Can also support two LVTTL inputs.
HSMB_CLK_IN_N1 AA5
Samtec HSMC
HSMB_CLK_IN_P2 W6
LVDS or LVTTL
LVDS input from the installed HSMC cable or
board. Can also support two LVTTL inputs.
HSMB_CLK_IN_N2 W5
PCI Express
Edge PCIE_REFCLK_P AN38
HCSL
HCSL input from the PCI Express edge
connector.
PCIE_REFCLK_N AN39
Table 2–20. Stratix IV GX FPGA Development Board Clock Inputs (Part 2 of 2)
Source Schematic Signal Name Pin I/O Standard Description