Patent ID: 11870612
Assignee: INTEL CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. An apparatus comprising:
a first input-output (IO) interface including,
a first transmitter with a first adjustable transmitter termination resister (Rtx); and
a first receiver with a first adjustable receiver termination resister (Rrx);

wherein the first IO interface is configured to be coupled to a second IO interface in a second apparatus having a second transmitter and a second receiver via a bi-directional communication link comprising a first channel coupled between the first transmitter and the second receiver and a second channel coupled between the second transmitter and the first receiver, and wherein the first IO interface is configured to:
calibrate the first Rrx during link training of one of the first and second channels; and
following calibration of the first Rrx, transmit the calibrated resistance value for the Rrx to the second receiver,
wherein the calibrated resistance value for the first Rrx is used to set a resistance value of an adjustable transmitter termination resister in the second transmitter.