US 12,087,394 B2
Synchronous input buffer control using a ripple counter
Brian W. Huber, Allen, TX (US); Scott E. Smith, Plano, TX (US); and Gary L. Howe, Allen, TX (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Sep. 8, 2022, as Appl. No. 17/930,655.
Prior Publication US 2024/0087621 A1, Mar. 14, 2024
Int. Cl. G11C 7/10 (2006.01)
CPC G11C 7/1084 (2013.01) [G11C 7/109 (2013.01); G11C 7/1093 (2013.01); G11C 7/1096 (2013.01)] 24 Claims
OG exemplary drawing
 
18. A memory device, comprising:
a command interface configured to receive write commands in an even pipeline and an odd pipeline from a host device;
a data strobe (DQS) input buffer configured to buffer a DQS signal from the host device;
a first ripple counter configured to suppress resets of the DQS input buffer while the first ripple counter is counting before reaching a threshold;
a second ripple counter configured to suppress resets of the DQS input buffer while the second ripple counter is counting before reaching the threshold; and
command handling circuitry, comprising:
clock domain shifting circuitry configured to shift commands received in the odd pipeline to a clock domain of the even pipeline;
stop count circuitry configured to stop counting in the first ripple counter or the second ripple counter if a subsequent write command is received before the respective ripple counter has reached the threshold; and
start count circuitry configured to start counting in the first ripple counter or the second ripple counter when a write command is received in the command interface.