Intel® Agilex™ F-Series and I-Series General-Purpose I/O User Guide

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ID 683780
Date 6/14/2022
Public
Document Table of Contents

2.2.3. Programmable I/O Element Features for the GPIO Bank

Table 4.  Programmable Slew Rate, De-Emphasis, and I/O DelayThis table lists the I/O standards that the feature supports and the available settings for each I/O standard.
I/O Standard Slew Rate Control De-Emphasis3 I/O Delay
SSTL-12
  • Fast (Default)
  • Medium
  • Slow
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
Refer to the device data sheet
HSTL-12
HSUL-12
Differential SSTL-12
Differential HSTL-12
Differential HSUL-12
POD-12
  • Fast (Default)
  • Medium
  • Slow
  • Off (Default)
  • Low
  • Medium
  • High
Refer to the device data sheet
Differential POD12
1.2 V LVCMOS
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
1.5 V True Differential Signaling Refer to the device data sheet
Table 5.  Programmable Open Drain Output, Bus Hold, and Weak Pull-Up ResistorThis table lists the I/O standard that the features support and the available settings.
I/O Standard Open Drain Output Bus Hold Weak Pull-Up Resistor
1.2 V LVCMOS
  • Off (Default)
  • On
  • Off (Default)
  • On
  • Off (Default)
  • On
Table 6.  Programmable Pre-Emphasis and Differential Output VoltageThis table lists the I/O standard that the features support and the available settings.
I/O Standard Pre-Emphasis Differential Output Voltage
1.5 V True Differential Signaling
  • Off
  • Low power (Default)
  • Constant impedance
  • Low
  • Medium low
  • Medium high (Default)
  • High
3 Only available if you use the Fast slew rate setting

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