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

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ID 683780
Date 6/14/2022
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2.5.14. GPIO Pins During Power Sequencing

Intel® Agilex™ devices do not support hot-socketing and require a specific power sequence. Design your power supply solution to properly control the complete power sequence.

Adhere to the these guidelines to prevent unnecessary current draw on the I/O pins located in the GPIO banks. These guidelines apply for unpowered, power up to power-on reset (POR), POR delay, POR delay to configuration, configuration, initialization, user mode, and power down device states.

  • The I/O pins in the GPIO banks can be tri-stated, driven to ground, or driven to the VCCIO_PIO level.
  • While the Intel® Agilex™ device is powering up or down:
    • The input signals of an I/O pin, at all times, must not exceed the I/O buffer power supply rail of the bank where the I/O pin resides.
    • If you use a pin in a GPIO bank with 1.5 V VCCIO_PIO, the pin voltage must not exceed the VCCIO_PIO rail or 1.2 V, whichever is lower.
  • While the Intel® Agilex™ device is powering up, powering down, or not turned on, the GPIO pins can tolerate a maximum of 10 mA per pin and a total of 100 mA per GPIO bank.
  • After the Intel® Agilex™ device fully powers up, the voltage levels for the GPIO pins must not exceed the DC input voltage (VI) value.
Table 18.  Guideline Examples
Condition Guideline
The VCCIO_PIO pin ramps up and at period X, the VCCIO_PIO voltage is 1.1 V. At period X, keep the signals driven by the device connected to the GPIO I/O pin at a voltage of 1.1 V or lower.
The 1.5 V VCCIO_PIO pin ramps up and the voltage continues to rise pass the 1.2 V level. Keep the GPIO pin voltage at 1.2 V or lower until the Intel® Agilex™ device fully powers up.

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