Memory device with a multiplexed command/address bus
AssigneeLodestar Licensing Group LLC
InventorWilliam A. Lendvay
Life of this patent
Estimating the term…
Abstract
A memory device includes a first plurality of volatile memories, a non-volatile memory, and a controller coupled to the non-volatile memory and including a first controller output. The memory device further includes a registering clock driver (RCD) including a first RCD output, and a first multiplexer including a first mux input coupled to the first RCD output, a second mux input coupled to the first controller output, and a first mux output coupled to the first plurality of volatile memories. The first multiplexer can be configured to provide command/address signals from one of the RCD and the controller to the first plurality of volatile memories.
Claims20
An apparatus, comprising:
- a volatile memory;
- a non-volatile memory;
- a controller coupled to the non-volatile memory;
- and
- a registering clock driver (RCD) configured to:
- receive command/address signals from a host system or from the controller;
- and
- provide the command/address signals from either the host system or the controller to the volatile memory.
An apparatus, comprising:
- a volatile memory;
- a non-volatile memory;
- a controller coupled to the non-volatile memory;
- and
- circuitry coupled with the controller, a host system, and the volatile memory, the circuitry configured to:
- receive first command/address signals from the host system or from the controller;
- provide the first command/address signals from either the host system or the controller to a first portion of the volatile memory;
- receive second command/address signals from the host system or from the controller;
- and
- provide the second command/address signals from either the host system or the controller to a second portion of the volatile memory.
An apparatus comprising:
- a substrate;
- a controller on the substrate, the controller configured to generate first command/address signals;
- a registering clock driver (RCD) on the substrate;
- a first memory on the substrate;
- and
- a second memory on the substrate, wherein the first memory and the second memory are each configured to:
- receive second command/address signals from a host system coupled with the apparatus through the RCD;
- and
- receive the first command/address signals from the controller without passing through the RCD.
Dependencies are inferred from the claim text.