IBUFDS_IBUFDISABLE - 2020.2 English

Primitive: Differential Input Buffer With Input Buffer Disable

PRIMITIVE_GROUP: I/O
PRIMITIVE_SUBGROUP: INPUT_BUFFER
Families: UltraScale, UltraScale+

Introduction

This primitive is a differential input buffer with input disable for additional power savings when the input data is not needed. The USE_IBUFDISABLE attribute must be set to TRUE and the SIM_DEVICE to the appropriate value for this primitive to have the expected architecture specific behavior.

I/O attributes that do not impact the logic function of the component, such as IOSTANDARD, DIFF_TERM, and IBUF_LOW_PWR, should be supplied to the top-level port via an appropriate property. For details on applying such properties to the associated port, see the Vivado Design Suite Properties Reference Guide (UG912).

Port Descriptions

Port	Direction	Width	Function
I	Input	1	Diff_p Buffer Input. Connect to top-level p-side input port.
IB	Input	1	Diff_n Buffer Input. Connect to top-level n-side input port.
IBUFDISABLE	Input	1	The IBUFDISABLE feature is not supported with this primitive in the UltraScale architecture. This port must be tied to logic '0'.
O	Output	1	Buffer output

Design Entry Method

Instantiation	Yes
Inference	No
IP and IP Integrator Catalog	No

Available Attributes

Attribute	Type	Allowed Values	Default	Description
SIM_DEVICE	STRING	"7SERIES", "ULTRASCALE"	"7SERIES"	Set the device version for simulation functionality.
USE_IBUFDISABLE	STRING	"TRUE", "FALSE"	"TRUE"	This attribute must be unspecified or set to "TRUE" if specified.

VHDL Instantiation Template

Unless they already exist, copy the following two statements and paste them before the entity declaration.

Library UNISIM;
use UNISIM.vcomponents.all;


-- IBUFDS_IBUFDISABLE: Differential Input Buffer With Input Buffer Disable
--                     UltraScale
-- Xilinx HDL Language Template, version 2020.2

IBUFDS_IBUFDISABLE_inst : IBUFDS_IBUFDISABLE
generic map (
   SIM_DEVICE => "ULTRASCALE"  -- Set the device version for simulation functionality (ULTRASCALE)
)
port map (
   O => O,                     -- 1-bit output: Buffer output
   I => I,                     -- 1-bit input: Diff_p buffer input (connect directly to top-level port)
   IB => IB,                   -- 1-bit input: Diff_n buffer input (connect directly to top-level port)
   IBUFDISABLE => IBUFDISABLE  -- 1-bit input: Buffer input disable, high=disable
);

-- End of IBUFDS_IBUFDISABLE_inst instantiation

Verilog Instantiation Template


// IBUFDS_IBUFDISABLE: Differential Input Buffer With Input Buffer Disable
//                     UltraScale
// Xilinx HDL Language Template, version 2020.2

IBUFDS_IBUFDISABLE #(
   .SIM_DEVICE("ULTRASCALE")  // Set the device version for simulation functionality (ULTRASCALE)
)
IBUFDS_IBUFDISABLE_inst (
   .O(O),                     // 1-bit output: Buffer output
   .I(I),                     // 1-bit input: Diff_p buffer input (connect directly to top-level port)
   .IB(IB),                   // 1-bit input: Diff_n buffer input (connect directly to top-level port)
   .IBUFDISABLE(IBUFDISABLE)  // 1-bit input: Buffer input disable, high=disable
);

// End of IBUFDS_IBUFDISABLE_inst instantiation

Related Information

See the UltraScale Architecture SelectIO Resources User Guide (UG571).
See the Vivado Design Suite Properties Reference Guide (UG912).