US 12,073,084 B2
Data masking for pulse amplitude modulation
Keun Soo Song, Eagle, ID (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Aug. 23, 2022, as Appl. No. 17/821,594.
Claims priority of provisional application 63/239,673, filed on Sep. 1, 2021.
Prior Publication US 2023/0060813 A1, Mar. 2, 2023
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0613 (2013.01) [G06F 3/0629 (2013.01); G06F 3/0673 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An apparatus comprising:
an interface for a memory interconnect;
data path circuitry configured to:
implement pulse amplitude modulation (PAM) signaling for data written to or read from memory via the interface, and
implement a data mask function that is configured to:
enable data masking for a group of data bits to be transmitted via a set of data lines of the memory interconnect using the PAM signaling;
alter at least one PAM symbol of a set of PAM symbols that corresponds to the group of data bits to provide an altered set of PAM symbols with respective states that indicate data masking is enabled for the group of data bits; and
transmit, via the set of data lines of the memory interconnect, the altered set of PAM symbols with the respective states that indicate data masking is enabled for the group of data bits.