US 11,922,171 B2
Temperature based decision feedback equalization retraining
Doug S. Winterberg, Austin, TX (US); Wan-Ju Kuo, Xindian District (TW); and Bhyrav Mutnury, Austin, TX (US)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by DELL PRODUCTS L.P., Round Rock, TX (US)
Filed on Oct. 26, 2022, as Appl. No. 17/973,807.
Application 17/973,807 is a continuation of application No. 17/386,799, filed on Jul. 28, 2021, granted, now 11,513,807.
Prior Publication US 2023/0046702 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 11/00 (2006.01); G06F 9/4401 (2018.01); G06F 11/22 (2006.01); H04L 25/03 (2006.01); G06F 11/14 (2006.01)
CPC G06F 9/4401 (2013.01) [G06F 11/2284 (2013.01); H04L 25/03057 (2013.01); G06F 11/1417 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An information handling system comprising:
a memory subsystem including a plurality of dual-inline memory modules, a memory channel, and memory controller circuitry; and
a basic input/output system (BIOS) to communicate with the memory subsystem, during a power on self test of the information handling system, the BIOS to:
perform a first training of the memory subsystem; and
store a first set of tap values; and
during a runtime of the information handling system, the memory controller circuitry to:
determine whether a temperature of the information handling system has changed by a predetermined amount; and
in response to the temperature changing by the predetermined amount, to automatically update tap values based on derating values in a derating table, wherein each of the derating values corresponds to a respective tap value at a respective temperature.