Multi-level receiver with termination-off mode

A method, comprising:

• receiving, at a first receiver from a memory device via a channel, a first signal modulated according to a first scheme that includes two levels;
• generating, at the first receiver, a first output based at least in part on a first comparison of a voltage of the first signal to a first reference voltage;
• receiving, at a set of receivers comprising a second receiver and a third receiver from the memory device via the channel, a second signal modulated according to a second scheme that includes three or more levels;
• generating at the second receiver, a second output based at least in part on a second comparison of a voltage of the second signal to a second reference voltage;
• and
• generating, at the third receiver, a third output based at least in part on a third comparison of the voltage of the second signal to a third reference voltage.

An apparatus, comprising:

• a first receiver coupled with a channel for a memory device;
• a set of receivers comprising a second receiver and a third receiver, the set of receivers coupled with the channel;
• and
• a controller coupled with the first receiver, the set of receivers, and the channel, the controller operable to cause the apparatus to:
• receive, at the first receiver from the memory device via the channel, a first signal modulated according to a first scheme that includes two levels;
• generate, at the first receiver, a first output based at least in part on a first comparison of a voltage of the first signal to a first reference voltage;
• and
• receive, at the set of receivers from the memory device via the channel, a second signal modulated according to a second scheme that includes three or more levels;
• generate, at the second receiver, a second output based at least in part on a second comparison of a voltage of the second signal to a second reference voltage;
• and
• generate, at the third receiver, a third output based at least in part on a third comparison of the voltage of the second signal to third reference voltage.