Intel Corporation

Ee Loon Teoh

Eng Hun Ooi

Christopher P Mozak

Roger K Cheng

Brian R Mcfarlane

In one embodiment, a link training controller is to train a link. The link training controller may be configured to: update a first link parameter of a link setting for the link to a first value; write data to the memory; read the data from the memory using the first value of the first link parameter; and in response to a determination that the data read from the memory does not match the data written to the memory, send an in-band link recovery command to the memory via the link to cause the memory to participate in a link recovery protocol with the apparatus. Other embodiments are described and claimed.

System, apparatus and method for recovering link state during link training

An I/O interface supports scrambling, where the scrambling can include nonlinear scrambling of the scrambling code, or dynamic bus inversion of the scrambling code, or selective switching of selected bits of the scrambling code, or a combination of these. The transmitting device includes a scrambler and the receiving device includes a descrambler. Both the scrambler and the descrambler generate a linear feedback scrambling code modified by applying one or more of the techniques mentioned above. The modified scrambling code may cause fewer than half of the scrambled output bits to be toggled with respect to a previous scrambled output. The scrambler applies the modified scrambling code to a signal to transmit. The descrambler applies the modified scrambling code to a received signal.

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Shrewsbury, MA, United States of America

Ee Loon Teoh