Power Management User Guide: Agilex™ 5 FPGAs and SoCs

ID 813161
Date 7/08/2024
Public
Document Table of Contents

3.2.1. Guidelines for I/O Pins in HSIO, HVIO, HPS IO, and SDM IO Banks During Power Sequencing

Agilex™ 5 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 following guidelines to prevent unnecessary current draw on the I/O pins located in the HSIO, HVIO, HPS IO, and SDM IO banks. These guidelines are applicable for unpowered, power up to POR, POR delay, POR delay to configuration, configuration, initialization, user mode, and power down device states.

  • The I/O pins in these banks can be in one the following states:
    • HSIO banks—tri-stated, driven to ground, or driven to the VCCIO_PIO level.
    • HVIO banks—tri-stated, driven to ground, or driven to the VCCIO_HVIO level.
    • HPS banks—tri-stated, driven to ground, or driven to the VCCIO_HPS level.
    • SDM banks—tri-stated, driven to ground, or driven to the VCCIO_SDM level.
  • While the Agilex™ 5 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 HSIO bank with 1.3 V VCCIO_PIO, the pin voltage must not exceed the VCCIO_PIO rail or 1.2 V, whichever is lower.
    • The input signals of an HVIO pin at all times must not exceed the VCCIO_HVIO rail.
  • While the Agilex™ 5 device is powering up, powering down, or not turned on, the HSIO, HVIO, SDM IO, and HPS IO pins can tolerate a maximum of 10 mA per pin and a total of 100 mA per I/O bank.
  • While the Agilex™ 5 device is not turned on, tri-state the I/O pin and do not drive the pin with any external voltage.
  • After the Agilex™ 5 device fully powers up, the voltage levels for the HSIO, HVIO, HPS IO, and SDM IO pins must not exceed the DC input voltage (VI) value.
Table 4.  Guideline Examples
Condition Guideline
The VCCIO_SDM pin ramps up and at period X, the VCCIO_SDM voltage is 0.9 V. At period X, keep the signals driven by the device connected to the SDM I/O pin at a voltage of 0.9 V or lower.
The VCCIO_HPS pin ramps up and at period X, the VCCIO_HPS voltage is 0.9 V. At period X, keep the signals driven by the device connected to the HPS I/O pin at a voltage of 0.9 V or lower.
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 HSIO I/O pin at a voltage of 1.1 V or lower.
The 1.3 V VCCIO_PIO pin ramps up and the voltage continues to rise pass the 1.2 V level. Keep the HSIO I/O pin voltage at 1.2 V or lower until the Agilex™ 5 device fully powers up.