Drive strength calibration for multi-level signaling

An apparatus, comprising:

• a memory controller, the memory controller operable to cause the apparatus to:
• determine, using a sense component of a memory device, a first difference between a reference voltage and a first voltage on a data channel electrically between the memory device and a memory controller, the reference voltage corresponding to a symbol level of a pulse amplitude modulation scheme;
• transmit to the memory controller a first feedback signal indicating the first difference between the first voltage and the reference voltage;
• and
• determine a second difference between the reference voltage and a second voltage on the data channel based at least in part on transmitting the first feedback signal to the memory controller.

An apparatus, comprising:

• a memory controller comprising a driver, the memory controller operable to cause the apparatus to:
• generate, by a first device using a first drive strength, a first voltage on a data channel coupled between the first device and a second device;
• receive, from the second device, an indication of a difference between the first voltage on the data channel and a reference voltage;
• and
• generate, by the first device using a second drive strength based at least in part on the indication, a second voltage on the data channel.