VCCAUX_IO - 2022.1 English

Vivado Design Suite Properties Reference Guide

Document ID
UG912
Release Date
2022-06-08
Version
2022.1 English
VCCAUX_IO

VCCAUX_IO

VCCAUX_IO specifies the operating voltage of the VCCAUX_IO rail for a given I/O.

DRCs are available to ensure that VCCAUX_IO property assignments are correct:

VCCAUXIOBT (warning): ensures that ports with VCCAUX_IO values of NORMAL or HIGH are only placed in HP banks.

VCCAUXIOSTD (warning): ensures that ports with VCCAUX_IO values of NORMAL or HIGH do not use IOSTANDARDs that are only supported in HR banks.

VCCAUXIO (error): ensures that ports with VCCAUX_IO values of NORMAL are not constrained/placed in the same bank as a port with a VCCAUX_IO value of HIGH.

Architecture Support

7 series FPGAs and Zynq-7000 SoC devices on High Performance (HP) bank I/O only.

Applicable Objects

Ports (get_ports)

Values

DONTCARE (default)

NORMAL

HIGH

Syntax

Verilog Syntax

To set this attribute, place the proper Verilog attribute syntax before the top-level output port declaration.

(* VCCAUXIO = "{DONTCARE|NORMAL|HIGH}" *)

Verilog Syntax Example

// Specifies a “HIGH” voltage for the VCCAUX_IO rail connected to this I/O

(* VCCAUX_IO = "HIGH" *) input ACT3,

VHDL Syntax

To set this attribute, place the proper VHDL attribute syntax before the top-level output port declaration.

Declare the VHDL attribute as follows:

attribute VCCAUX_IO : string;

Specify the VHDL attribute as follows:

attribute VCCAUX_IO of port_name : signal is value;

Where

port_name is a top-level port.

VHDL Syntax Example

ACT3 : in std_logic;

attribute VCCAUX_IO : string;

-- Specifies a HIGH voltage for the VCCAUX_IO rail connected to this I/O

attribute VCCAUX_IO of ACT3 : signal is “HIGH”;

XDC Syntax

set_property VCCAUX_IO value [get_ports port_name]

Where

port_name is a top-level port.

XDC Syntax Example

# Specifies a HIGH voltage for the VCCAUX_IO rail connected to this I/O

set_property VCCAUX_IO HIGH [get_ports ACT3]

Affected Steps

I/O Planning

Place Design

report_power