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DE10-Agilex
User Manual
58
www.terasic.com
January 29,
2021
p
QSFPDDB_REFCLK_n
QSFP-DD port transceiver
reference clock n
LVDS
PIN_A
P
13
QSFPDDB_INITMODE
Initialization mode
1.2V
PIN_DA18
QSFPDDB_INTERRUPT_n
Interrupt
1.2V
PIN_DC18
QSFPDDB_MOD_PRS_n
Module Present
1.2V
PIN_CY19
QSFPDDB_MOD_SEL_n
Module Select
1.2V
PIN_CR22
QSFPDDB_RST_n
Module Reset
1.2V
PIN_CU22
QSFPDDB_SCL
2-wire serial interface clock
1.2V
PIN_CY17
QSFPDDB_SDA
2-wire serial interface data
1.2V
PIN_H19
2.8
PCI Express
The FPGA development board is designed to fit entirely into a PC motherboard with
x16 PCI Express slot. Utilizing built-in transceivers on an Agilex device, it is able to
provide a fully integrated PCI Express-compliant solution for multi-lane (x1, x4, x8 and
x16) applications. With the PCI Express hard IP block incorporated in the Agilex device,
it will allow users to implement simple and fast protocol, as well as saving logic
resources for logic application.
presents the pin connection established
between the Agilex FPGA and PCI Express.
The PCI Express interface supports complete PCI Express Gen1 at 2.5Gbps/lane,
Gen2 at 5.0Gbps/lane, Gen3 at 8.0Gbps/lane and Gen4 at 16.0Gbps/lane protocol
stack solution compliant to PCI Express base specification 4.0 that includes PHY-MAC,
Data Link, and transaction layer circuitry embedded in PCI Express hard IP blocks.
Please note that it is a requirement that you connect the PCIe external power
connector 8-pin 12V DC power connector in the FPGA to avoid FPGA damage due to
insufficient power. The PCIE_REFCLK_p signal is a differential input that is driven from
the PC motherboard on this board through the PCIe edge connector. A DIP switch
(SW6) is connected to the PCI Express to allow different configurations to enable x1,
x4, x8 or x16 PCIe lane.
summarizes the PCI Express pin assignments of the signal names relative
to the Agilex FPGA.