Agilex™ 7 Clocking and PLL User Guide: M-Series

ID 769001
Date 4/01/2024
Document Table of Contents LAB Clock Gate

The M-Series LAB register has built-in clock gating functionality. The register clock enable mechanism is a hardened data feedback, as shown in the Clock Gating and Clock Divider in M-Series Clock Network diagram. The LAB clock gate offers no associated power savings because this is a purely functional clock enable.

The Quartus® Prime Analysis & Synthesis stage of the Compiler infers a LAB clock gate from a behavioral description of clock gating in the register transfer level (RTL). If you want a physical clock gate, you must instantiate it explicitly.