AN 886: Intel® Agilex™ Device Design Guidelines

ID 683634
Date 8/26/2022
Public
Document Table of Contents

3.4. I/O Pin Count, LVDS SERDES Channels, and Package Offering

Table 16.  I/O Pin Count, LVDS Channels, and Package Offering Checklist
Number Done? Checklist Item
1   Estimate the number of I/O pins that you require.
2   Consider the I/O pins you need to reserve for debugging.
3   Verify that the number of LVDS SERDES channels are enough.
4   Evaluate fabric speed grade and the transceiver speed grade.
5   Consider I/O voltages required for chip to chip interfaces and ensure that they are compatible with supported standards.

Determine the required number of I/O pins for your application, considering the design’s interface requirements with other system blocks.

Larger densities and package pin counts offer more unidirectional LVDS SERDES channels for differential signaling; ensure that your device density-package combination includes enough LVDS SERDES channels. Other factors can also affect the number of I/O pins required for a design, including simultaneous switching noise (SSN) concerns, pin placement guidelines, pins used as dedicated inputs, I/O standard availability for each I/O bank, differences between I/O standards and speed for row and column I/O banks, and package migration options.

You can compile any existing designs in the Intel® Quartus® Prime software to determine how many I/O pins are used. Also consider reserving I/O pins for debugging.

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