Active termination control
AssigneeMicron Technology, Inc.
InventorJeffery W. Janzen
Life of this patent
Estimating the term…
Abstract
A method and apparatus are provided for active termination control in a memory. The memory turns on active termination based on information programmed into one or more mode registers of the memory. The memory maintains the active termination in an on state for a predetermined time based on information programmed into one or more mode registers of the memory.
Claims23
A method for active termination control in a memory comprising:
- receiving an active termination control signal at the memory;
- turning on active termination in the memory, based on information in one or more mode registers in the memory, in response to receiving the active termination control signal;
- and
- controlling on-timing and off-timing of the active termination, the on-timing and off-timing directly correlated to data retrieval parameters stored in the one or more mode registers.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- and
- turning on active termination, based on information in one or more mode registers, in response to receiving the active termination control signal, wherein turning on active termination occurs at a CAS latency less two clock cycles plus an additive latency after receiving the active termination control signal.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- turning on active termination, based on information in one or more mode registers, in response to receiving the active termination control signal;
- and
- maintaining the active termination on for a predetermined time, wherein maintaining the active termination on for a predetermined time includes a predetermined time of about a burst length divided by two plus one and a half clock cycles.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- and
- turning on active termination, based on information in one or more mode registers, in response to receiving the active termination control signal, wherein the method includes in response to receiving another active termination control signal while the active termination is on, maintaining the active termination on for a predetermined time set relative to the last active termination control signal received.
A method for active termination control in a memory comprising:
- receiving an active termination control signal at the memory;
- turning on active termination, based on information in one or more mode registers in the memory, in response to receiving the active termination control signal;
- controlling on-timing of the active termination, the on-timing directly correlated to a data retrieval parameter stored in the one or more mode registers;
- and
- maintaining the active termination on for a predetermined time correlated to a burst length.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- turning on active termination, based on information in one or more mode registers, in response to receiving the active termination control signal;
- and
- maintaining the active termination on for a predetermined time correlated to a burst length, wherein maintaining the active termination on for a predetermined time correlated to a burst length includes providing an off time of about three and one-half cycles after turning on.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- turning on active termination, based on information in one or more mode registers, in response to receiving the active termination control signal;
- and
- maintaining the active termination on for a predetermined time correlated to a burst length, wherein the method includes in response to receiving another active termination control signal while the active termination is on, maintaining the active termination on for a predetermined time set relative to the last active termination control signal received.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- turning on active termination, based on information in one or more mode registers, in response to receiving the active termination control signal;
- and
- maintaining the active termination on for a predetermined time correlated to a burst length, wherein the method includes having the active termination on for at least a portion of time in the memory on a first memory module during which an active termination is on in another memory on a second memory module, the first memory module and the second memory module using a common data bus.
A method for active termination control in a memory comprising:
- receiving an active termination control signal;
- ignoring the received active termination control signal;
- and
- turning on active termination in response to receiving a write command, based on information in one or more mode registers.
Dependencies are inferred from the claim text.