BUFGCE Clock Buffers

UltraScale Architecture Clocking Resources User Guide (UG572)

Document ID
UG572
Release Date
2023-02-01
Revision
1.10.2 English

BUFGCE is a clock buffer with one clock input, one clock output, and a clock enable line ( This Figure ). This buffer provides glitchless clock gating. BUFGCE can directly drive the routing resources and is a clock buffer with a single gated input. Its O output is 0 when CE is Low (inactive). When CE is High, the I input is transferred to the O output.

Figure 2-18: BUFGCE Buffer

X-Ref Target - Figure 2-18

X16679-bufgce-buffer-block.jpg

Table: BUFGCE Pins lists the BUFGCE pins.

Table 2-5: BUFGCE Pins

Pin Name

Type

Invertible

Description

CE

Input

TRUE

Clock enable

I

Input

FALSE

Clock buffer

O

Output

FALSE

Clock buffer

Table: BUFGCE Attributes shows the BUFGCE attributes.

Table 2-6: BUFGCE Attributes

Attribute Name

Values

Default

Type

Description

CE_TYPE

SYNC, ASYNC

SYNC

STRING

Sets the clock enable behavior where SYNC allows for glitchless transition while ASYNC allows immediate transition.

This Figure shows the BUFGCE timing diagram.

Figure 2-19: BUFGCE Timing Diagram

X-Ref Target - Figure 2-19

X16680-bufgce-timing.jpg