US 12,067,261 B2
Serial presence detect logging
Aws Shallal, Cary, NC (US); and Chen Chen, Cupertino, CA (US)
Assigned to Rambus Inc., San Jose, CA (US)
Filed by Rambus Inc., San Jose, CA (US)
Filed on Jul. 5, 2022, as Appl. No. 17/857,252.
Claims priority of provisional application 63/270,977, filed on Oct. 22, 2021.
Claims priority of provisional application 63/222,298, filed on Jul. 15, 2021.
Prior Publication US 2023/0014101 A1, Jan. 19, 2023
Int. Cl. G06F 12/00 (2006.01); G06F 3/06 (2006.01)
CPC G06F 3/0622 (2013.01) [G06F 3/0644 (2013.01); G06F 3/0683 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A serial presence detect memory device, comprising:
a password register;
a first plurality of nonvolatile memory locations to store serial presence detect information according to a serial presence detect standard; and
a second plurality of nonvolatile memory locations to store first data, the second plurality of nonvolatile memory locations subject to write access protection that is configurable and the write access protection is to become not configurable based on the serial presence detect memory device receiving a first write command to write a first value stored in the password register and in succession to the first write command, receiving a second write command to write a second value that is not stored in the password register.