Primitive: General Clock Buffer with Clock Enable and Output State 1
- PRIMITIVE_GROUP: CLOCK
- PRIMITIVE_SUBGROUP: BUFFER
- Families: UltraScale, UltraScale+
Introduction
This design element is a general clock buffer with a single gated
input. When clock enable (CE) is Low (inactive), its O output is 1.
When CE is High, the I input is transferred to the O
output.
Logic Table
| Inputs |
Outputs |
| I |
CE |
O |
| X |
0 |
1 |
| I |
1 |
I |
Port Descriptions
| Port |
Direction |
Width |
Function |
| CE |
Input |
1 |
Clock buffer active-High enable. |
| I |
Input |
1 |
Clock input. |
| O |
Output |
1 |
Clock 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 |
"ULTRASCALE", "ULTRASCALE_PLUS", "ULTRASCALE_PLUS_ES1", "ULTRASCALE_PLUS_ES2"
|
"ULTRASCALE" |
|
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;
-- BUFGCE_1: General Clock Buffer with Clock Enable and Output State 1
-- UltraScale
-- Xilinx HDL Language Template, version 2024.2
BUFGCE_1_inst : BUFGCE_1
generic map (
SIM_DEVICE => "ULTRASCALE_PLUS"
)
port map (
O => O, -- 1-bit output: Clock output.
CE => CE, -- 1-bit input: Clock buffer active-High enable.
I => I -- 1-bit input: Clock input.
);
-- End of BUFGCE_1_inst instantiation
Verilog Instantiation Template
// BUFGCE_1: General Clock Buffer with Clock Enable and Output State 1
// UltraScale
// Xilinx HDL Language Template, version 2024.2
BUFGCE_1 #(
.SIM_DEVICE("ULTRASCALE_PLUS")
)
BUFGCE_1_inst (
.O(O), // 1-bit output: Clock output.
.CE(CE), // 1-bit input: Clock buffer active-High enable.
.I(I) // 1-bit input: Clock input.
);
// End of BUFGCE_1_inst instantiation