US Patent 11755238 Continuous NAND data-transfer using filling rate evaluation approach

A data storage device includes a memory device and a controller coupled to the memory device. The controller is configured to deliver a continuous DQS signal, determine whether a fill rate of a write buffer or an emptying rate of read buffer is sufficient to continuously send user data to the memory device or from the memory device, evaluate timing for sending or receiving the user data, and transfer data to or from the memory device continuously with the DQS signal. The data sent to the memory device includes the user data and garbage data, where the user data and the garbage data are separately transferred. The data received from the memory device includes user data that is sampled and user data that is not sampled, where the user data that is sampled and the user data that is not sampled are separately received.