Agilex™ 3 FPGA and SoC C-Series Development Kits User Guide

ID 851698
Date 9/02/2025
Public
Document Table of Contents

A.3.1. PCI Express* ( PCIe* ) Interface

For PCIe* applications, the power for the Agilex™ 3 FPGA/FPGA and SoC C-Series development board must be sourced by an external USB-PD Type-C power adapter as the board is not designed to receive power from the PCIe* host system.

The board is designed to fit entirely into a PCIe* host system with a x1 PCI Express* slot that can accommodate a full height, 1/2 length form factor add-in card when the optional Altera PCIe* 3.0 x1 gold finger daughter board is installed. The supported data rate for this application is 8 Gbps ( PCIe* 3.0) using the Agilex™ 3 FPGA's PCI Express* hard IP block, saving logic resources for the user logic application.

Table 20.   PCI Express* ( PCIe* ) Pin Assignments with Gold Finger Daughter Board
Gold Finger Pin Number Schematic Signal Name FPGA Pin Number I/O Standard Description
A1 PRSNT1_N Card present
A11 RPI_PCIE_X1_RST_B AG26 3.3 V LVCMOS PCIe* reset
A13 RPI_PCIE_REFCLK_P To Si5332 clock generator (U23) HCSL Host PCIe* clock
A14 RPI_PCIE_REFCLK_N To Si5332 clock generator (U23) HCSL Host PCIe* clock
A16 RPI_PCIE_X1_PETP P30 True Differential PCIe* receive lane 0
A17 RPI_PCIE_X1_PETN P29 True Differential PCIe* receive lane 0
B5 FRU_ID_EEPROM_SCL

FRUID EEPROM

(U1 on Altera PCIe* 3.0 x1 gold finger board)

3.3 V SMB clock
B6 FRU_ID_EEPROM_SDA

FRUID EEPROM

(U1 on Altera PCIe* 3.0 x1 gold finger board)

3.3 V SMB data
B11 EDGE_PCIE_X1_WAKE AH27 3.3 V PCIe* wake
B12 RPI_PCIE_X1_CLKREQ_N AK19 3.3 V PCIe* Clock request
B14 RPI_PCIE_X1_PERP K30 True Differential PCIe* transmit lane 0
B15 RPI_PCIE_X1_PERP K29 True Differential PCIe* transmit lane 0
B17 PRSNT1_N Card present