Accessing data stored in a command/address register device

摘要

A register not connected to a data bus is read by transferring data across an address bus to a device connected to the data bus, from which the data is read by a device connected to the data bus. The register resides in a register device connected via the address bus to a memory device that is connected to both the address bus and the data bus. A host processor triggers the register device to transfer information over the address bus to a register on the memory device. The host processor then reads the information from the register of the memory device.

主权项

1. An apparatus comprising:
a dynamic random access memory (DRAM) comprising at least one page having at least one multipurpose register (MPR) and comprising:
a first interface that, when operatively coupled to an address bus, is to receive a control word (CW) and provide the CW to a particular MPR anda second interface communicatively coupled to the at least one page having at least one MPR, wherein:the at least one page having at least one MPR to be written-to using the first interface during a coupling of the first interface to the address bus and to be read-from using the second interface during a coupling of the second interface to a data bus.