System aware transmitter adaptation for high speed serial interfaces

摘要

A high-speed serial interface includes a transmitter having an output module with settings that select an output impedances of the output module and a tuning value for the output impedance, and a receiver having a plurality of compensation modules each to provide a selectable level of equalization to a data bitstream from the transmitter, and a control module that directs the transmitter to successively select each of the tuning values, that directs the compensation modules, for each tuning value, to successively select each of the levels of equalization, that evaluates an indication of a performance level of the receiver for each of the successively selected levels of equalization and for each of the tuning values, and that selects a particular tuning value based upon the indications of the performance level of the receiver.

主权项

1. A high-speed serial interface, comprising:
a transmitter having an output module with a first setting that selects an output impedance from among a plurality of output impedances of the output module, and a second setting that selects a tuning value from among a plurality of tuning values for the output impedance; and a receiver having:
a plurality of compensation modules each to provide a selectable level of equalization to a data bitstream from the transmitter; anda control module that directs the transmitter to successively select each of the tuning values, that directs the compensation modules, for each tuning value, to successively select each of the levels of equalization, that evaluates an indication of a performance level of the receiver for each of the successively selected levels of equalization and for each of the tuning values, and that selects a particular tuning value based upon the indications of the performance level of the receiver.