External Memory Interfaces Intel Agilex® 7 M-Series FPGA IP User Guide

ID 772538
Date 4/03/2023

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6.2.3. Pin Guidelines for Intel Agilex® 7 M-Series FPGA EMIF IP

The Intel Agilex® 7 M-Series FPGA contains I/O banks on the top and bottom edges of the device, which can be used by external memory interfaces.

Intel Agilex® 7 M-Series FPGA I/O banks contain 96 I/O pins. Each bank is divided into two sub-banks with 48 I/O pins in each. Sub-banks are further divided into four byte-lanes, where each byte-lane is a group of twelve I/O ports.

Intel Agilex® 7 M-Series FPGAs do not support flexible DQ group assignments. Only specific byte-lanes can be used as Address/Command lanes or data lanes. As you increase the interface width, only specific byte-lanes can be used. Refer to Pin Placement for Intel Agilex M-Series FPGA DDR4 IP for more information.

The I/O bank, byte-lane, and pairing pin for every physical I/O pin can be uniquely identified by the following naming convention in the device pin table:

  • The I/O pins in a bank are represented as P#, where:
    • P# represents the pin number in a bank. It ranges from P0 to P95, for 96 pins in a bank. Because an IO96 bank comprises two IO48 sub-banks, all pins with P# value less than 48 (P# <48) belong to the bottom I/O sub-bank. All other pins belong to the top IO48 sub-bank.
  • The Index Within I/O Bank value falls within one of the following ranges: 0 to 11, 12 to 23, 24 to 35, or 36 to 47, and represents one of byte-lanes 0, 1, 2, or 3, respectively.
  • To determine whether I/O banks are adjacent, you can refer to Architecture: I/O Bank in the Product Architecture chapter. In general, the two sub-banks within an I/O bank are adjacent to each other when there is at least one byte-lane in each sub-bank that is bonded out and available for EMIF use.
  • The pairing pin for an I/O pin is in the same I/O bank. You can identify the pairing pin by adding 1 to its Index Within I/O Bank number (if it is an even number), or by subtracting 1 from its Index Within I/O Bank number (if it is an odd number).