Method and apparatus for refreshing a memory cell

A method comprising:

• storing retention time profile information at dedicated data storage of a memory device;
• receiving refresh commands from a memory controller, wherein the refresh commands are received at a rate based at least partially on the retention time profile information;
• and
• refreshing memory cells within the memory device in response to receiving a refresh command.

A method comprising:

• reading, at a memory controller, retention time profile information from dedicated data storage of a memory device;
• generating refresh commands at a rate based at least partially on the retention time profile information;
• and
• sending the refresh commands to the memory device via a command bus, wherein the refresh commands instruct the memory device to refresh memory cells.

A method comprising:

• detecting, at a memory controller, a first rate of first pulses from a first memory device over a first sideband channel, wherein the first rate is associated with a refresh rate of first memory cells in the first memory device;
• detecting a second rate of second pulses from a second memory device over a second sideband channel, wherein the second rate is associated with a refresh rate of second memory cells in the second memory device;
• and
• sending refresh commands to the first memory device and to the second memory device at the first rate or at the second rate, wherein the refresh commands instruct the first memory device to refresh the first memory cells, and wherein the refresh commands instruct the second memory device to refresh the second memory cells.