Frequency division clock alignment

Abstract

Generating a clock signal includes: at a root node of a clock distribution network, receiving a first clock signal; at a first leaf node of the clock distribution network, detecting a reference event and generating a synchronizing signal based on the detection of the reference event; passing the synchronizing signal along a synchronizing signal path from the first leaf node to the root node via one or more clocked storage cells, each storage cell being clocked from a corresponding point within the clock distribution network; at the root node, generating a second clock signal from the first clock signal synchronized to the synchronizing signal received at the root node, and distributing the second clock signal to the leaf nodes of the clock distribution network, the generating of the second clock signal resulting in the second clock signal received at the first leaf node being synchronized to the detected reference event.