BUFH - 2021.2 English

Vivado Design Suite 7 Series FPGA and Zynq-7000 SoC Libraries Guide (UG953)

Document ID
UG953
Release Date
2021-10-22
Version
2021.2 English

Primitive: HROW Clock Buffer for a Single Clocking Region

Introduction

The BUFH primitive allows direct access to the clock region entry point of the global buffer (BUFG) resource. This allows access to unused portions of the global clocking network to be used as high-speed, low skew local (single clock region) routing resources.

Port Descriptions

Port Direction Width Function
I Input 1 Clock input.
O Output 1 Clock output.

Design Entry Method

Instantiation Yes
Inference No
IP Catalog No
Macro support No

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;

-- BUFH: HROW Clock Buffer for a Single Clocking Region
--       7 Series
-- Xilinx HDL Language Template, version 2021.2

BUFH_inst : BUFH
port map (
   O => O, -- 1-bit output: Clock output
   I => I  -- 1-bit input: Clock input
);

-- End of BUFH_inst instantiation

Verilog Instantiation Template


// BUFH: HROW Clock Buffer for a Single Clocking Region
//       7 Series
// Xilinx HDL Language Template, version 2021.2

BUFH BUFH_inst (
   .O(O), // 1-bit output: Clock output
   .I(I)  // 1-bit input: Clock input
);

// End of BUFH_inst instantiation

Related Information

  • See the 7 Series FPGAs Clocking Resource User Guide (UG472).