Intel® MAX® 10 FPGA Design Guidelines

ID 683196
Date 10/19/2020
Public
Document Table of Contents

1.6.2.6. Verify that all voltage-referenced signals in each I/O bank are intended to use the bank's VREF voltage (for devices that support VREF pins)

  • To accommodate voltage-referenced I/O standards, each bank supports either a shared VREF pin or an individual VREF pin. Set the VREF pins to the correct voltage for the I/O standards in the bank. For more information, refer to the Intel® MAX® 10 General Purpose I/O User Guide or Intel® MAX® 10 Device Pin-Outs.
  • The voltage-referenced I/O standards are not supported in the following I/O banks of these device packages:
    • All I/O banks of V36 package of 10M02 device
    • All I/O banks of V81 package of 10M08 device
    • Banks 1A and 1B of E144 package of 10M50 device
  • Each I/O bank can only have a single VCCIO voltage level and a single VREF voltage level at a given time. If you use a shared VREF pin, you must supply a common VCCIO voltage to the I/O banks which share the same VREF pin. If the VREF pins are not used as voltage references, the pins can be used as regular I/O pins.
  • An I/O bank, including single-ended or differential standards, can support voltage-referenced standards as long as all voltage-referenced standards use the same VREF setting.
  • For performance reasons, voltage-referenced input standards use their own VCCIO level as the power source. You can place voltage-referenced input signals in a bank with a VCCIO of 2.5 V or below.
  • Voltage-referenced bidirectional and output signals must drive out at the VCCIO voltage level of the I/O bank.