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

ID 683841
Date 3/06/2023
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5.3.4. User Autoprecharge Commands

The autoprecharge read and autoprecharge write commands allow you to indicate to the memory device that this read or write command is the last access to the currently open row. The memory device automatically closes or autoprecharges the page it is currently accessing so that the next access to the same bank is quicker.

This command is useful for applications that require fast random accesses.

Since the HPC II controller can reorder transactions for best efficiency, when you assert the local_autopch_req signal, the controller evaluates the current command and buffered commands to determine the best autoprecharge operation.