US 11,989,430 B2
Memory module with persistent calibration
Thomas Vogelsang, Mountain View, CA (US); and Brent Steven Haukness, Sunnyvale, CA (US)
Assigned to Rambus Inc., San Jose, CA (US)
Filed by Rambus Inc., San Jose, CA (US)
Filed on Apr. 14, 2022, as Appl. No. 17/721,176.
Claims priority of provisional application 63/201,169, filed on Apr. 15, 2021.
Prior Publication US 2022/0334738 A1, Oct. 20, 2022
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0629 (2013.01) [G06F 3/0604 (2013.01); G06F 3/0679 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A memory module comprising:
one or more memory devices;
a memory interface chip coupled to the one or more memory devices via one or more internal communication links, the one or more internal communication links comprising a shared command/address line coupled between the memory interface chip and each of the one or more memory devices and one or more respective data lines coupled between the memory interface chip and each respective memory device; and
a persistent memory storing one or more sets of training and calibration settings corresponding to communication over the one or more internal communication links, the one or more sets of training and calibration settings comprising a first set of training and calibration settings corresponding to the shared command/address line and a second set of training and calibration settings corresponding to the one or more respective data lines, wherein the one or more sets of training and calibration settings are stored in the persistent memory before operation of the memory module and used to configure one or more components of the memory interface chip during the operation of the memory module.