Kaya Instruments Komodo Fiber, Reference Manual

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Komodo Fiber Reference Guide 18
The “diff_en” signal coming from the FPGA, enables (when set to logic 1) data transfer from pins 1
- 4 on the GPIO header, to pins AH26 and AK28 on the FPGA. This signal also enables data
transfer from pins AK27 and AM26 on the FPGA to pins 5 – 8 on the GPIO header.
4.8.2 General purpose LEDs
On the Komodo Fiber there are four user-define LEDs, all are green light and active low.
Board
reference
Signal
Name
Arria V GZ
Pin Number
I/O Standard Description
D1 led[0] AB11 2.5 V (Open drain)
User-defined LEDs. Driving logic
0 on the I\O port turns the LED on;
driving high-z on the I\O turns the
LED off
D2 led[1] AE10 2.5 V (Open drain)
D3 led[2] AE11 2.5 V (Open drain)
D4 led[3] W11 2.5 V (Open drain)
Table 4: General purpose LEDs pin assignments, signal name and functions
PCI Express (Gen 3.0)
The Komodo Fiber is designed to fit entirely into a PC motherboard with a ×8 PCI Express slot that
can accommodate a full height long form factor add-in card.
The PCI Express edge connector has a connection speed of 2.5 Gbps/lane for a maximum of 20
Gbps full-duplex (Gen1) or 5.0 Gbps/lane for a maximum of 40 Gbps full-duplex (Gen2) or 8.0
Gbps/lane for a maximum of 64 Gbps full-duplex (Gen3).
The power for the board can be sourced entirely from the PCI Express edge connector when
installed into a PC motherboard.
The PCIe reference clock is a 100 MHz differential input that is driven from the PC motherboard on
to this board through the edge connector. This clock is connected directly to an Arria V GZ refclk
input pin pair using DC coupling. This clock is terminated on the motherboard and therefore, no on-
board termination is required.
JTAG signals (TCK, TDI, TDO and TMS) of the PCIe connector are not connected to the FPGA.
Board
reference
(J17)
Signal Name
Arria V
GZ Pin
Number
I/O Standard Description
A1 pcie_prsntn1n - 3.3-V LVTTL Hot plug presence detect
B17 pcie_prsntn1n_x1 - 3.3-V LVTTL Hot plug presence detect
B31 pcie_prsntn1n_x4 - 3.3-V LVTTL Hot plug presence detect
B48 pcie_prsntn1n_x8 - 3.3-V LVTTL Hot plug presence detect
A5 pcie_jtag_tck - 3.3-V LVTTL JTAG chain clock
A6 pcie_jtag_tdi - 3.3-V LVTTL JTAG chain data in
A7 pcie_jtag_tdo - 3.3-V LVTTL JTAG chain data out
Board Components