公开(公告)号：US20230132306A1

公开(公告)日：2023-04-27

申请号：US17506746

申请日：2021-10-21

Applicant: Advanced Micro Devices, Inc.

Inventor： YuBin Yao ,  Eric M. Scott ,  TieFeng Liu

IPC: G06F3/06

Abstract: A method for performing read training of a memory channel includes writing a data pattern to a memory using a data bus having a predetermined number of bit lanes. An edge of a read data eye is determined individually for each bit lane by reading the data pattern over the data bus using a read bust cycle having a predetermined length, grouping data received on each bit lane over the read burst cycle to form a bit lane data group, and comparing the bit lane data group to corresponding expected data of the data pattern for each bit lane, logging a phase of each bit lane on which said edge is found, and repeating the reading, grouping, comparing, and logging until the edge is found for all of the bit lanes.

公开(公告)号：US11742043B2

公开(公告)日：2023-08-29

申请号：US17506746

申请日：2021-10-21

Applicant: Advanced Micro Devices, Inc.

Inventor： YuBin Yao ,  Eric M. Scott ,  TieFeng Liu

IPC: G11C29/00 ,  G11C29/02 ,  G06F3/06 ,  G11C7/10 ,  G11C7/22

CPC classification number: G11C29/028 ,  G06F3/0673 ,  G11C7/1066 ,  G11C7/222 ,  G11C29/023

Abstract: A method for performing read training of a memory channel includes writing a data pattern to a memory using a data bus having a predetermined number of bit lanes. An edge of a read data eye is determined individually for each bit lane by reading the data pattern over the data bus using a read bust cycle having a predetermined length, grouping data received on each bit lane over the read burst cycle to form a bit lane data group, and comparing the bit lane data group to corresponding expected data of the data pattern for each bit lane, logging a phase of each bit lane on which said edge is found, and repeating the reading, grouping, comparing, and logging until the edge is found for all of the bit lanes.