US 12,148,502 B2
Drive strength calibration for multi-level signaling
Peter Mayer, Neubiberg (DE); Wolfgang Anton Spirkl, Germering (DE); Michael Dieter Richter, Ottobrunn (DE); Martin Brox, Munich (DE); and Thomas Hein, Munich (DE)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on May 26, 2023, as Appl. No. 18/202,584.
Application 18/202,584 is a continuation of application No. 17/882,478, filed on Aug. 5, 2022, granted, now 11,688,435.
Application 17/882,478 is a continuation of application No. 17/241,876, filed on Apr. 27, 2021, granted, now 11,443,779, issued on Sep. 13, 2022.
Application 17/241,876 is a continuation of application No. 16/538,376, filed on Aug. 12, 2019, granted, now 10,998,011, issued on May 4, 2021.
Claims priority of provisional application 62/720,287, filed on Aug. 21, 2018.
Prior Publication US 2023/0386527 A1, Nov. 30, 2023
Int. Cl. G11C 7/22 (2006.01); G11C 5/14 (2006.01); G11C 7/10 (2006.01); G11C 11/22 (2006.01); G11C 11/56 (2006.01)
CPC G11C 5/147 (2013.01) [G11C 5/148 (2013.01); G11C 7/1063 (2013.01); G11C 7/1069 (2013.01); G11C 7/109 (2013.01); G11C 7/1096 (2013.01); G11C 11/221 (2013.01); G11C 11/2273 (2013.01); G11C 11/56 (2013.01); G11C 11/5657 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method, comprising:
determining, by a memory device based at least in part on performing a first type of calibration procedure that uses a calibration resistor, a first drive strength for a driver that communicates over a data line according to a modulation scheme that includes at least a first voltage level and a second voltage level higher than the first voltage level;
increasing, based at least in part on determining the first drive strength for the driver using the first type of calibration procedure and as part of performing a second type of calibration procedure for the second voltage level that involves feedback from a host device, a drive strength of the driver from an initial level until the host device coupled with the driver indicates, via the feedback, that a voltage output by the driver is greater than a target voltage level; and
determining, for the driver, a second drive strength for the second voltage level based at least in part on the host device indicating that the voltage output by the driver is greater than the target voltage level.