MBUFG_PS - 2021.2 English

Versal Architecture AI Core Series Libraries Guide (UG1353)

Document ID
UG1353
Release Date
2021-10-22
Version
2021.2 English

Primitive: A Multi-Output high-fanout buffer for low-skew distribution of the PS Clock signals

  • PRIMITIVE_GROUP: CLOCK
  • PRIMITIVE_SUBGROUP: BUFFER

Introduction

A Multi-Output high-fanout buffer for low-skew distribution of the PS Clock signals.

Port Descriptions

Port Direction Width Function
CLRB_LEAF Input 1 Active low clear of BUFDIV_LEAF
I Input 1 Clock buffer input.
O1 Output 1
  • I in PERFORMANCE MODE
  • I*2 in POWER MODE
O2 Output 1
  • I/2 in PERFORMANCE MODE
  • I in POWER MODE
O3 Output 1
  • I/4 in PERFORMANCE MODE
  • I/2 in POWER MODE
O4 Output 1
  • I/8 in PERFORMANCE MODE
  • I/4 in POWER MODE

Design Entry Method

Instantiation Yes
Inference No
IP and IP Integrator Catalog Recommended

Available Attributes

Attribute Type Allowed Values Default Description
MODE STRING "PERFORMANCE", "POWER" "PERFORMANCE"
Sets the mode of operation that determines the output clock generation. For PERFORMANCE MODE, the outputs are generated as follows:
  • O1 = I
  • O2 = I/2
  • O3 = I/4
  • O4 = I/8
For POWER MODE, the outputs are generated as follows:
  • O1 = I*2
  • O2 = I
  • O3 = I/2
  • O4 = I/4

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;

-- MBUFG_PS: A Multi-Output high-fanout buffer for low-skew distribution of the PS Clock signals
--           Versal AI Core series
-- Xilinx HDL Language Template, version 2021.2

MBUFG_PS_inst : MBUFG_PS
generic map (
   MODE => "PERFORMANCE"  -- PERFORMANCE, POWER
)
port map (
   O1 => O1,               -- 1-bit output: Buffer
   O2 => O2,               -- 1-bit output: Buffer
   O3 => O3,               -- 1-bit output: Buffer
   O4 => O4,               -- 1-bit output: Buffer
   CLRB_LEAF => CLRB_LEAF, -- 1-bit input: Active low clear
   I => I                  -- 1-bit input: Clock buffer input
);

-- End of MBUFG_PS_inst instantiation

Verilog Instantiation Template


// MBUFG_PS: A Multi-Output high-fanout buffer for low-skew distribution of the PS Clock signals
//           Versal AI Core series
// Xilinx HDL Language Template, version 2021.2

MBUFG_PS #(
   .MODE("PERFORMANCE")  // PERFORMANCE, POWER
)
MBUFG_PS_inst (
   .O1(O1),               // 1-bit output: Buffer
   .O2(O2),               // 1-bit output: Buffer
   .O3(O3),               // 1-bit output: Buffer
   .O4(O4),               // 1-bit output: Buffer
   .CLRB_LEAF(CLRB_LEAF), // 1-bit input: Active low clear
   .I(I)                  // 1-bit input: Clock buffer input
);

// End of MBUFG_PS_inst instantiation

Related Information

  • Versal ACAP Clocking Resources Architecture Manual (AM003)