Data clock synchronization in hybrid memory modules

Abstract

Disclosed herein are techniques for implementing data clock synchronization in hybrid memory modules. Embodiments comprise a clock synchronization engine at a command buffer to generate a synchronized data clock having a phase relationship with data signals from a non-volatile memory controller that compensates for various synchronous and/or asynchronous delays to facilitate latching of the data signals at certain DRAM devices (e.g., during data restore operations). Other embodiments comprise a divider to determine the frequency of the synchronized data clock by dividing a local clock signal from the non-volatile memory controller by a selected divider value. Some embodiments comprise a set of synchronization logic that invokes the generation of the synchronized data clock signal responsive to receiving a certain local command and/or frame pulse from the non-volatile memory controller. In other embodiments, certain fixed and/or programmable delay elements can be implemented to compensate for various asynchronous delays.