External Memory Interface Handbook Volume 3: Reference Material: For UniPHY-based Device Families

ID 683841
Date 3/06/2023
Document Table of Contents

3.4.1. Clocking

The ports on the MPFE can be clocked at different frequencies, and synchronization is maintained by cross-domain clocking logic in the MPFE.

Command ports can connect to different clocks, but the data ports associated with a given command port must be attached to the same clock as that command port. For example, a bidirectional command port that performs a 64-bit read/write function has its read port and write port connected to the same clock as the command port. Note that these clocks are separate from the EMIF core generated clocks.