Intel® Agilex™ General-Purpose I/O and LVDS SERDES User Guide

ID 683780
Date 10/29/2021
Public

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2.2. Programmable I/O Element (IOE) Features in Intel® Agilex™ Devices

The SDM and HPS I/O buffers in Intel® Agilex™ devices support different I/O standards and programmable I/O features than the general-purpose I/O buffers.
Table 6.  Programmable IOE Feature Settings for Intel® Agilex™ GPIO BankThis table lists the supported IOE features for each I/O standards in the GPIO banks.
I/O Standard Programmable IOE Feature
Slew Rate Control I/O Delay Open-Drain Output Bus-Hold Weak Pull-up Resistor Pre-emphasis De-emphasis3 Differential Output Voltage
1.2 V LVCMOS
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • On
  • Off (Default)
  • On
  • Off (Default)
  • On
SSTL-12
  • Fast (Default setting for GPIO implementation)
  • Medium (Default setting for EMIF implementation)
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
HSTL-12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
HSUL-12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
POD-12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
Differential SSTL-12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
Differential HSTL-12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
Differential HSUL-12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
  • Low constant impedance
  • Medium constant impedance
  • High constant impedance
Differential POD12
  • Fast (Default)
  • Medium
  • Slow
Refer to the device data sheet
  • Off (Default)
  • Low
  • Medium
  • High
1.5 V True Differential Signaling Refer to the device data sheet
  • Off
  • Low power (Default)
  • Constant impedance
  • Low
  • Medium low
  • Medium high (Default)
  • High
Table 7.   Programmable IOE Feature Settings for Intel® Agilex™ HPS I/O BankThis table lists the supported IOE features for each I/O standards in the HPS I/O banks.
I/O Standard Programmable IOE Feature
Current Strength Slew Rate Weak Pull-up/Pull-down Schmitt Trigger/TTL Input Open-Drain
1.8 V LVCMOS
  • 2 mA
  • 4 mA
  • 6 mA
  • 8 mA (Default)
  • Slow
  • Fast (Default)
  • Disabled
  • Weak pull-up with 20 kOhm resistor (Default)
  • Weak pull-up with 50 kOhm resistor
  • Weak pull-up with 80 kOhm resistor
  • Weak pull-down with 20 kOhm resistor
  • Weak pull-down with 50 kOhm resistor
  • Weak pull-down with 80 kOhm resistor
  • Schmitt Trigger (Default)
  • TTL
  • Enabled
  • Disabled (Default)
3 Only available if you use the Fast slew rate setting.

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